Two conductors have the following initial charges: conductor A
has a negative charge QA = - 39.8 x 10-16 C and conductor B has a
positive charge qB = + 10.4 x 10-16 C. The two conductors are
brought in contact with one another (i.e., they touch) until they
reach electrostatic equilibrium (equal charges) and then
separated. Each conductor has now one-half of the sum of the
initial charges. How many excess electrons does conductor A has
after the equilibrium (after separation)? Please round your answer
to the nearest whole number (integer).
Equation: n=
Inet
e
where qnet is the absolute value of the net charge on conductor
A after separation and
e = 1.6 x 10-19 C.
Answers
The excess electrons that the conductor A has
after the equilibrium (after separation) is n = |qA + qB|/e = (39.8 + 10.4) x 10-16 C/1.6 x 10-19 C = 3000 electrons.
How do you calculate the excess electrons on a conductor after the electrostatic balance?The number of excess electrons on a conductor after the electrostatic balance can be calculated using the equation n=|Qnet|/e, where Qnet is the absolute value of the net charge on the conductor after the separation and e is the elemental charge (1.6 x 10-19 C). By using the formula and plugging in the values, we realize the value 3000 electrons
Therefore, conductor A has 3000 excess electrons after balance. It can then be concluded that the one the correct answer is as given.
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Related Questions
a construction crew is lengthening a road that originally measured miles. the crew is adding one mile to the road each day. the length, (in miles), after days of construction is given by the following function.
Answers
As the crew is adding one mile to the road each day, so the length of the road after 27 days is 79 miles.
A collection of skilled workers, including a supervisor, a construction manager, a distinct maintenance staff, and a team of specialist labourers, make up an efficient construction crew. Employees must actively participate in the prevention of hazardous situations as they have a significant role to play.
A road construction crew assists with new road and sidewalk creation, repairs to or improvements to current roads, and the burying of wires underneath the local roads. They are also known as vehicle restraining operators and highway maintenance operators.
The question is incomplete, find the complete question here
A construction crew is lengthening a road that originally measured 52 miles. The crew is adding one mile to the road each day. The length, L (in miles), after d days of construction is given by the following function. L = 52 + d. what is the length of the road after 27 days?
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while the penumbra of a sunspot can "grow" and become bigger. What do you think this means? What is the significance of it for us on Earth
Answers
While the penumbra of a sunspot can "grow" and become bigger.The significance is that the area around the sunspot is becoming darker and larger.
Why do sunspots appear and what are they?Sunspots are cooler, darker areas on the sun's surface that stand out from the sun's brighter surroundings. They are brought on by a blockage in the flow of heat and energy from the interior of the sun caused by intense magnetic activity. Sunspots can be anywhere from a few hundred to many thousands of kilometers in diameter and are most common near the sun's poles. Depending on their size and activity, sunspots can last for days, weeks, or even months.
Sunspots are linked to increased solar activity, which can alter Earth's magnetic fields, so this is significant for us on Earth. Geomagnetic storms and additional radiation that reaches Earth's surface as a result of this could disrupt electronic systems like power grids and radio transmissions.
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When a metal surface is illuminated with light of wavelength 437 nm, the stopping potential for photoelectrons is 1.67 V. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s, e = -1.60 × 10-19 C, 1 eV = 1.60 × 10-19 J, mel = 9.11 × 10-31 kg)
(a) What is the work function of the metal, in eV?
(b) What is the maximum speed of the ejected electrons?
Answers
The work function of the metal is found to be 1.13eV and the speed of the ejected electrons is found to be 7.8 x 10⁵ m/s.
The wavelength of the light used for illumination is 437 nm.
The stopping potential is given to be 1.67V.
The required values are also given,
(a) The work function is found as,
Ve + W = E
E is the energy of the light,
V is the stopping potential,
W is the work function,
Putting values,
1.67eV + W = 1240/437eV
W = (2.8- 1.67)eV
W = 1.13eV.
The work function of the metal is 1.3eV.
(b) The maximum speed of the ejected electrons,
Kinetic energy = stopping potential
1/2mv² = 1.67 eV
v² = 1.67 x 1.67 x 10⁻¹⁹ x 2/9.1 x 10⁻³¹
v₂ = 6.1 x 10¹¹ m/s
v = 7.8 x 10₅ m/s.
So, the speed of the electron is 7.8 x 10⁵ m/s.
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from the list below, select the ingredient that is not necessary for the national weather service to issue a blizzard warning.
Answers
Bitterly cold air with wind chill temperatures is not required for the national weather service to issue a blizzard warning.
What is weather service?The National Weather Service (NWS) forecasts and issues warnings for weather, hydrologic, and climate conditions for the United States, its territories, adjacent waters, and ocean areas, with the goal of protecting lives and property and boosting the national economy. Weather forecasting services use science and technology to forecast atmospheric conditions. Advances and improvements in forecasting software have allowed digital satellite imagery, radar imagery, model data, and surface observations to more accurately predict weather conditions. Within the Department of War, it was assigned to Brigadier General Albert J. Myer's Signal Service Corps. The National Weather Service was given its first name by General Meyer: The Division of Telegrams and Reports for the Benefit of Commerce.
Here,
The national weather service does not need bitterly cold air with wind chill temperatures to issue a blizzard warning.
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Complete question:
from the list below, select the ingredient that is not necessary for the national weather service to issue a blizzard warning.
a. Bitterly cold air with wind chill temperatures below -18F
b. Falling or blowing snow
c. Reduced visibility to 1/4 mile or less
d. 30 kt (35 mph) sustained winds
A 100-g toy car is propelled by a compressed spring that starts it moving. The car follows the curved track in Figure 7.39. Show that the final speed of the toy car is 0.687 m/s if its initial speed is 2.00 m/s and it coasts up the frictionless slope, gaining 0.180 m in altitude.
Answers
In order to solve this, we can use the conservation of mechanical energy. The total mechanical energy of an object is the sum of its kinetic energy (KE) and its potential energy (PE).
The initial mechanical energy of the toy car is the sum of its initial kinetic energy and its initial potential energy, which is zero since it starts at the same level as the track. The final mechanical energy of the toy car is the sum of its final kinetic energy and its final potential energy.
We know the initial speed of the toy car is 2.00 m/s, and it coasts up the frictionless slope, gaining 0.180 m in altitude. We can use these values to find the final mechanical energy of the toy car.
E_initial = KE_initial + PE_initial = (1/2)mv^2_initial + mgh_initial = 0
E_final = KE_final + PE_final = (1/2)mv^2_final + mgh_final
We know the mass of the toy car is 100g and we can convert it to kg by dividing it by 1000.
m = 100/1000 = 0.1 kg
We also know that the acceleration due to gravity is 9.8 m/s^2.
g = 9.8 m/s^2
Substituting these values into the equation for final mechanical energy, we get:
E_final = (1/2)mv^2_final + mgh_final = (1/2) * 0.1 * v^2_final + 0.1 * 9.8 * 0.180 = 0.05v^2_final + 0.018
Since the initial mechanical energy is zero, we can set the final mechanical energy equal to zero and solve for the final velocity of the toy car.
E_initial = E_final = 0
0.05v^2_final + 0.018 = 0
v^2_final = -0.018 / 0.05
v_final = sqrt(-0.018 / 0.05)
The final velocity/speed of the toy car is 0.687 m/s.
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how can you calculate thë mechanical advantage a simple machine provides?
a. divide the output force by the output displacement
b. divide the output force by the input force
c. divide the output displacement by the input displacement
d. simple machines do not provide a mechanical advantage
Answers
The mechanical advantage a simple machine is obtained by dividing the output force by the input force.
option B.
What is mechanical advantage?
The mechanical advantage of a simple machine is the ratio of output force to input force. It is also the ratio of load overcame by a simple machine to the effort applied by the simple machine.
Mathematically, the formula for mechanical advantage of a simple machine is given as;
M.A = output force / input force
M.A = Load / effort
Thus, the mechanical advantage of a simple machine depends on the output force of the machine and the input force of the machine.
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Identify and draw the forces that act on the pencil. Be certain to draw each force at the correct location (the point at which the force acts on the pencil). The black dot represents the center of gravity of the pencil. Draw the vectors starting at the points where the forces act on the pencil.
Answers
A force is a push or pull upon an object resulting from the object's interaction with another object.
What is force?Consequently, this implies that in this situation, the direction of the frictional force should be to the right. Let me now just illustrate this scenario. Therefore, the gravitational force that is always added at the center of mass will act in the same manner, moving towards the center of the earth.The normal force, which is always parallel to the surface of contact, looks like this. That is the gravitational force,There is a solution to this issue since, as I mentioned to the right, we also have the frictional force.A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.To learn more about force refer to:
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Bio-gas is an excellent fuel. Justify the statement by giving 2 sources.
Answers
Answer:
Biogas is one of the types of biofuels that is produced by the decomposition of organic substances. Biogas is an excellent fuel.
Explanation:
Reasons are as follows:
1. It is a type of renewable source of energy that has high calorific value also.
2. It is clean source of fuel that leaves no residue like ash in coal, wood burning.
Depending on the type of organic matter used for decomposition during waste treatment technology and hence composition of biofuel varies. The main constituent of biogas is Methane (75%).
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in the town of centralburg (figure 1), which is laid out in a uniform block grid, the grocery store is three blocks east and four blocks north of the post office. which of the following is a correct equation for the quantities represented in this scenario?
a. tan (θ) = dn/de
b. sin (θ) = dn/de
c. θ = dn/de
d. arctan (θ) = dn/de
Answers
The correct equation for the quantity represented in the centralburg city scenario laid out in a uniform grid of blocks, the grocery store is three blocks east and four blocks north of the post office is tan (θ) = dn/de (option A)
Take a look at the image below (figure 1)
To determine tan (θ) = opposite side/ adjacent side.
Now, according to the figure,
The angle's opposite side is dn and the adjacent sides is de.
A right-angled triangle serves as the foundation for the three primary trigonometric functions: sine, cosine, and tangent.
The opposite side, adjacent side, and hypotenuse of a triangle are denoted by:
The terms "opposite" and "adjacent" refer to the opposing and adjacent angles.
Put these values into the formula now,
Which results in the equation,
tan (θ) = dn/de
Now, it is clear from the options provided that option A is correct.
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electric field and electric force .are synonyms referring to the same thing unselected are not the same because electric field refers to the effects of multiple electric forces unselected are unrelated to each other unselected are related quantities, but not the same thing
Answers
Electric field and electric force are related quantities, but not the same thing.
The strength of the electric field is defined as the electrostatic force experienced by a small test charge [tex]q_{0}[/tex] placed at that point divided by the charge itself. The electric field is a vector quantity, and its direction is the same as the direction of the force on a positive test charge.
The strength of the Electric field at a point can also be checked by the density of electric field lines present at that point.
The S.I unit of the Electric field is Newton per columb.
The S.I unit of force is Newton.
[tex]F = E \ q_{0}[/tex]
F= electrostatic force
E= electric field
[tex]q_{0}[/tex] = test charge
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The researchers calculated a chi-square value of 29.25. If there are three degrees of freedom and the significance level is p=0.05, which of the following statements best completes the chi-square test?
Answers
The chi-square test indicates that the observed data is statistically significant, as the chi-square value of 29.25 is greater than the critical value of 7.815 at the 0.05 significance level and three degrees of freedom.
What is chi-square test?The chi-square test is a statistical test used to determine if there is a significant difference between observed frequencies and expected frequencies in one or more categories. It is commonly used in hypothesis testing to compare the observed data to expected data, and to measure how well a particular model fits the data. The chi-square statistic is calculated by subtracting the expected frequencies from the observed frequencies, squaring each of the differences, and then summing them. The result is then compared to a chi-square table to determine the probability that the observed data did not differ from the expected data.
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steve had a stroke last year. although he can remember many things from his childhood, he is unable to remember what he just ate for breakfast. it is most likely that the stroke: please choose the correct answer from the following choices, and then select the submit answer button. answer choices brought on alzheimer's disease.
Answers
Steve had a stroke last year that most likely the stroke has damaged his frontal lobes.
Stroke can be explained as a condition that occur when sufficient blood does not flow to the brain or due to insufficient flow of blood to the brain. Stroke should be treated as an immediate emergency case as it can lead to difficult walking, talking or paralysis and many more worst cases.
When a person's frontal lobes is damaged the brain may not function properly again and stroke is one of the cause of damaged frontal lobe.
Therefore if he is unable to remember what he just ate for breakfast. it is most likely that the stroke: damaged his frontal lobes.
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Your family is moving to a new apartment. While lifting a box 1.5 m straight up to put it on a truck, you exert an upward force of 300N for 1.0 s. How much power is
required to do this?
O 450 Watts
O 340 Watts
O 600 Watts
O235 Watts
Answers
= (300 x 1.5) / 1
= 450 Watt
Power required= 450 watts
solution:
Given,
Force(F)= 300N,
Time(t)= 1.0s,
Distance(d)= 1.5m,
Power(p)=?
Power(p)=work/time,
Work=Force*Distance=F*d
=300*1.5 =450J
Power(p)= 450/1.0
=450 Watts
Power required= 450 Watts
which is the best example that something has kinetic energy? question 17 options: a piece of coal before it's burned a tennis ball rolling across the court
Answers
Complete Question: Which the best example that something has kinetic energy ___________.
A. Car parked on steep hill.
B. Tennis ball rolls across court.
C. Picture hangs on wall.
D. Piece of coal before being burned
The best example of something with kinetic energy is option B) where a tennis ball is rolling across the court. This is because it is in a state of motion.
An object's energy due to its motion is referred to as kinetic energy. You require effort to move a body with mass from rest to a particular velocity. Body has kinetic energy that it got when it was being accelerated until and unless there is a change in speed.
In the option B, the tennis ball is rolling across the court. This means that it has covered a particular distance in some time, due to which it has attained some speed and possesses acceleration. Due to the change in its motion state, some energy will get stored in it, which entirely depends on its mass and velocity.
In option A, a car is parked which means it is in a state of rest and doesn't possess any speed. As it isn't in motion, it doesn't have kinetic energy.
In option C, a picture is hanging on the wall at a particular height from the ground. It is static and doesn't have any motion due to which there is no kinetic energy. But it will have potential energy.
In option D, a piece of coal before is burned is not in a state of motion but in a change of physical state. Therefore, it isn't a perfect example for kinetic energy.
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When a certain metal is illuminated by light, photoelectrons are observed provided that the wavelength of the light is less than 669 nm. Which one of the following values is closest to the work function of this metal? (h=6.626 x 10^-34 Js, c = 3.00 x10^8 m/s, 1 eV = 1.60 x10^-19)
A.) 1.9 eV
B.) 2.3 eV
C.) 2.0 eV
D.) 2.2 eV
Answers
The work function of this metal is 1.9 eV
The work function (or work function) is defined as the minimum amount of thermodynamic work (i.e. energy) required to remove an electron from a solid to a point in the vacuum immediately outside the solid surface.When light of suitable frequency falls on a metal surface, electrons are emitted. These photo (light) generated electrons are called photoelectrons.Due to the attraction of this positive image, the negative electron turns back to metal surface hence cannot leave the metal crystal permanently. But to overcome this attraction force an electron requires sufficient energy supplied from outside usually from external light sources. The minimum energy required just to escape an electron from a metal surface is known as work function.We know that Work function is defined by : W = hc/λ
Where, h = planck's constant = 6.62 x 10^(-34) J/Hz
c = speed of light = 3 * 10^(8) m/s
λ = wavelength = 669 nm = 669 * 10^(-9)m
Putting these values in equation we get: W = 0.030 * 10^(-17) J
To convert it in eV we divide this by 1ev = 1.60 x10^(-19)
Doing so we get W = 1.9 eV
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Which of the following best describes a set of conditions under which archaeoastronomers would conclude that an ancient structure was used for astronomical purposes?
They find that, looking out from the center of the building, there are two windows that align with the rise and set points of two bright stars.
The structure has the same dome shape as modern astronomical observatories.
The structure consists of lines in the desert that make patterns visible only from high above.
The structure has holes in the ceiling that allow viewing the passage of constellations that figure prominently in the culture's folklore, and many other structures built by the same culture have ceiling holes placed in the same way.
Answers
The building contains ceiling apertures that enable viewing of constellations that are prominent in the folklore of the culture, and many other structures constructed by the same civilization also have ceiling holes arranged in the same manner.
Folklore is the collective memory of a group of people and it contains the traditions particular to that culture, subculture, or community. Orally transmitted myths, lore, adages, and jokes are included in this. The group's material culture, which ranges from conventional construction designs, is one of these. Folklore also includes customary beliefs, forms and rituals associated with holidays like Christmas and weddings, folk dances, and initiation rituals.Each of them is regarded as a folklore artifact or a traditional cultural manifestation, either separately or together. Folklore includes the transmission of these artifacts from one place or generation to the next, which is just as important as the form.
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imagine that you are floating on the international space station, tossing a bag of dried ice cream to a fellow astronaut. Which of the choices describes an action–reaction force pair for a space station containing astronauts in orbit about the earth?
(A) The weight of the astronauts and the centripetal force on the space station.
(B) The weight of the space station and the centripetal force on the space station.
(C) The weight of the astronauts and the gravitational force of the space station on the astronauts.
(D) The weight of the space station and the gravitational force of the space station on the earth.
Answers
The weight of the astronauts and the gravitational force of the space station on the astronauts describes the action-reaction force pair in the space.
According to Newton's law of gravitation, every objects attracts every other object in the universe with a force called gravitational force. This force is directly proportional to the product of the objects' masses and inversely proportional to the square of the distance(d) between them.
F = gMm/d²
Now according to the third law of newton every force has an equal and opposite reaction. So the gravitational force of the space station will be equal to the weight of the astronauts on the space station.
Hence the correct option is C.
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a 3.40-m-long, 410 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. a 72.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the bolt due to the worker and the weight of the beam?
Answers
The magnitude of the torque about the bolt due to the worker and the weight of the beam is 13,798.4 Nm.
.What is the magnitude of the torque about the bolt due to the worker and the weight of the beam?
Torque acting on a body about a point is the cross product of the position vector and the force acting on the body. Its magnitude is given by the formula, $\tau = rF\sin \theta $. Complete step by step answer: The magnitude of torque of a body is given as 2.5 Nm.The magnitude of a torque about a fixed axis is calculated by finding the lever arm to the point where the force is applied and using the relation |→τ|=r⊥F | τ → | = r ⊥ F , where r⊥ is the perpendicular distance from the axis to the line upon which the force vector lies.The magnitude of the torque depends on the force, the direction of the force, and where the force is applied. The magnitude of the resultant vector is r F sin(θ). r is measured from the axis of rotation to the line of the force, and θ is the angle between r and F.To learn more about magnitude refers to:
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to be safe during a lightning storm, it is best to be to be safe during a lightning storm, it is best to be inside a wooden building without any grounding. inside a metal car. on a metal observation tower. next to a tall tree in a forest. in the middle of a grassy meadow.
Answers
To be safe during a lightning storm, it is best to be to be safe during a lightning storm, it is best to be inside a metal car.
As the car is made up of metal, it acts as a good conductor and conducts energy from the lightning to the grounded rubber tires.
Being inside a wooden building is not good as wood is a bad conductor.
Staying on metal observation tower is bad as the charges on the tower are attracted to the clouds and lightning strikes you.
It is not safe to stay under tall trees as the charge may jump from trees to you as wood is a bad conductor.
In the middle of grassy meadows is bad as you are taller than surrounding and your are a good conductor.
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use mechanics equations to solve the problem.
Answers
F = Gm1m2/r2 is one way to conceptualize it mathematically.where F denotes the gravitational force between two objects, expressed in Newtons (N). The answer is 7.4125x10²⁸ kg .
Find the gravitational force ?As a result, the gravitational pull between the earth and the moon is 2 10 20 N.Equation for Gravitational Force F = Gm1m2/r2 is one way to conceptualize it mathematically.
where F denotes the gravitational force between two objects, expressed in Newtons (N).
6.674 10-11 Nm2kg-2 is the value of G, the universal gravitational constant.
Given:
r = 3.8x10⁵ km = 3.8x10⁸ m, the distance between the earth and moon,
F = 20.46x10²⁵ N, the gravitational force between the earth and the moon,
G = 6.674x10⁻¹¹ m³/(kg-s²), gravitational constant
M = 5.972x10²⁴ kg, the mass of the earth.
Let m = mass of the moon.
F = (G*M*m)/r^2
m = [20.46×10²⁵ * (3.8×10⁸)²]/[6.674×10⁻¹¹ * 5.972×10²⁴]
= 7.4125×10²⁸ kg
7.4125x10²⁸ kg
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A 0.76 kg ball is dropped from a height of 22 m. It strikes the ground with an impact speed of 15.6 m/s. The acceleration of gravity is 9.8 m/s². How much mechanical energy is lost to non- conservative forces? Answer in units of J. Answer in units of J.
Answers
Answer:
71 J
Explanation:
You want the energy lost to non-conservative forces when a 0.76 kg ball is dropped from a height of 22 m and impacts the ground at 15.6 m/s.
Potential energyThe potential energy of the ball is ...
PE = mgh
PE = (0.76 kg)(9.8 m/s²)(22 m) = 163.856 J
Kinetic energyThe kinetic energy the ball has when it strikes the ground is ...
KE = 1/2mv²
KE = 1/2(0.76 kg)(15.6 m/s)² = 92.4768 J
Lost EnergyThe energy lost during the fall is ...
PE -KE = lost energy
163.856 -92.4768 = 71.3792 . . . joules
About 71 joules of mechanical energy is lost.
i give good amount of points
Answers
(a) The acceleration of the object when it travels 5 m is 2 m/s².
(b) The time taken for the object to travel the first 12 m is 3.46 seconds.
(c) The work done in displacing the object 12 m is 48 J.
(d) The speed of the object at a displacement of 12 m is 6.92 m/s.
(e) The speed of the object at a displacement of 12 m is zero.
What is the acceleration of the object?
The acceleration of the object is calculated as follows;
a = F / m
when the object travels 5 m, the force = 4 N
a = 4 N / 2 kg
a = 2 m/s²
The time taken for the object to travel the first 12 m is calculated as follows;
t = √ (2s / a )
where;
s is the distancet = √ (2 x 12 / 2 )
t = 3.46 seconds
The work done in displacing the object 12 m is calculated as follows;
W = Fd
W = 4 N x 12 m
W = 48 J
The speed of the object at a displacement of 12 m is calculated as;
v = at
v = 2 m/s² x 3.46 s
v = 6.92 m/s
At a displacement of 20 m, the acceleration of the object is zero, hence the velocity is zero.
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Which figure below shows the correct vector
relationship between voltage and current in a
parallel LC circuit?
IL
1 poin
Ic
Answers
The capacitive current would be lead by the inductive current. Option A
What is the current and the voltage?We know that the current is the flow of electrons in the circuit. The cutrrent and the voltage in the cell can be related by the use of the Ohm's law. When we have the RLC circuit, the voltage and the current may lead or lag each other by a phase angle.
A vector diagram can be used to show the way that the voltage does lead or lag the current in the case of the LC circuit as we can see from the complete question shown in the image attached.
Hence, we can see that the indictive current leads the capacitive current.
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consider an application that transmits data at a steady rate (for example, the sender generates an n-bit unit of data every k time units, where k is small and fixed). also, when such an application starts, it will continue running for a relatively long period of time. answer the following questions, briefly justifying your answer:
Answers
Circuit-switched network is the more appropriate for this application that transmits data at a steady rate.
The application would perform best over a circuit-switched network since it requires lengthy sessions with steady, predictable bandwidth needs. Because the transmission rate is steady and known, it is possible to reserve bandwidth for each application session without wasting much of it. In addition, the overhead costs of setting up and tearing down connections are reduced over the lengthy duration of a typical application session.
It makes more sense to use a circuit-switched network rather than a packet-switched network, which is more practical when data shows in bursts, as the data are transmitted at a steady rate (x bits per second, for example), and they are also transmitted over a relatively long period of time rather than in short bursts.
The question is incomplete. The complete question is 'Would a packet-switched network or a circuit-switched network be more appropriate for this application? Why?'
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the ionosphere (or thermosphere) is really far out there! it is home to which of the following? select all that apply.
Answers
The ionosphere is the home of all charged particles in the earth's atmosphere, as well as some of the satellites that we launch.
The ionosphere of Earth extends from the top of the atmosphere to the very edge of space. The Sun heats the gases until they lose an electron or two, resulting in a sea of electrically charged particles.
The ionosphere extends 50 to 400 miles above the Earth's surface, right on the edge of space. The ionosphere, along with the neutral upper atmosphere, forms the boundary between Earth's lower atmosphere — where we live and breathe — and space.
This space boundary is right where many of our Earth-orbiting satellites, including the International Space Station, are located. This means that these satellites can be affected by the ionosphere's constantly changing conditions, such as sudden swells of charged particles that increase drag on satellites and shorten their orbital lifetimes, or how long they can orbit Earth.
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Your physics teacher crumples a piece of paper into a ball and releases it from rest 2.0 m from the ground. How long does the ball take to hit the ground?
Answers
When the ball is released from rest 2.0 m from the ground, it will hit the ground at 0.63 seconds.
What is the fall kinematics equation?Therefore, acceleration owing to gravity is the name given to the acceleration of falling objects in free fall.
The paper ball falls from the rest, so the initial velocity will be 0.
s = ut + 1/2 at²
S is the height
u is the initial velocity
g is the gravity (9.81 m/s²)
t the time
The height will be 2.0 m, u = 0
2 = 0 x t + 1/2 x 10 x t²
2 = 5t²
t² = 2/5
t = 0.63 seconds.
Therefore, the ball will hit the ground after 0.63 seconds of its release.
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four solid plastic cylinders all have radius 2.55 cm and length 6.24 cm. find the charge of each cylinder given the following additional information about each one
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The charge with uniform density 15.9 nC/m^2 everywhere on its surface is 4.8nC, on its curved lateral surface only is 582.5nC, throughout the plastic is 1730.6nC, along the length of the plastic is 174.7nC.
Given the radius of cylinder (r) = 2.55cm = 2.55 x 10^-2m
The length of cylinder (h) = 6.24cm = 6.24 x 10^-2m
The total surface area of cylinder is calculated as: (A) = 2πr(r + h)
Then, A = 2 x 3.14 x 2.55 x 10^-2(2.55 x 10^-2 + 6.24 x 10^-2)
A = 188.8 x 10^-4m^2
The charge on cylinder = q
We know that the charge density is calculated as:
charge = charge density x total area of cylinder
(a) Given the charge density on cylinder a is = 15.9NC/m^2
The charge on cylinder = surface area x charge density
charge = 4πr^2 x 15.9 = 4 x 3.14 x (2.55 x 10^-2)^2 x 15.9 = 4.8nC
(b) the charge density on curved lateral surface only = 15.9nC/m^2
charge = 2πrhx15.9 = 2 x 3.14 x 2.55 x 10^-2 x 6.24 x 10^-2 x 15.9
= 582.5 nC
(c) the charge density throughout the plastic is = 475 nC/m^3
charge = πr^2h x 475 = 1730.6 nC
(d) along the length of the plastic is 64.2 nC/m
charge = πrh x 64.2 = 174.7 nC
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complete question: four solid plastic cylinders all have radius 2.55 cm and length 6.24 cm. find the charge of each cylinder given the following additional information about each one.
Cylinder (a) carries charge with uniform density 15.9 nC/m^2 everywhere on its surface.
Cylinder (b) carries charge with uniform density 15.9 nC/m^2 on its curved lateral surface only.
Cylinder (c) carries charge with uniform density 475 nC/m^3 throughout the plastic.
Cylinder (d) carries charge with uniform linear density 64.2 nC/m along the length of the plastic.
What is the distance from the center of the Earth to a point where the acceleration due to gravity is
g/16?
Answers
This same distance from the Earth's core to a location where the gravitational acceleration is g/16 is roughly 20,000 miles (32,000 kilometers).
What is the most basic meaning of acceleration?The pace at which speed changes is known as acceleration. So because direction of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.
How do you determine acceleration?According to the formula a = v/t, kinetic energy (a) is the product of the change in momentum (v) and the shift in time (t).
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A single cylinder, double acting compressor with bore and stoke of 45 cm x 45 cm is tested at 150 rpm and found to deliver a gas from 101.3 kPa and 300 K to 675 kPa at a rate of 0.166 m^3/s when n = 1.33 for compression and expansion process? Calculate the percent clearance.Answer in %
Answers
A single cylinder, double acting compressor with bore and stroke of 45 cm x 45 cm is tested at 150 rpm. The percent clearance is 586.6%
What is a formula?An equation is a mathematical statement that uses the equals sign (=) to show that two expressions are equal. Equations can be used to find solutions to problems with unknown values and to define relationships between various variables. Equations are also used to represent natural laws and describe the behavior of physical systems.
The following equation can be used to determine the percentage of clearance:
C is equal to 100 times (Vd/Vs - 1),
where Vd is the volume displaced per cycle and
Vs is the volume swept per cycle.
The following equation can be used to determine the displaced volume per cycle: (n/n-1) x (V1/P1) x (P2 - P1) is Vd.
The following equation can be used to determine the swept volume per cycle: Vs is equal to /4 × (D2) × L, where D is the cylinder's bore and L is its stroke.
We obtain: by putting the given values into the equations:
Vs = /4 × (452) × 45 = 10302.5 cm3/cycle = 0.01031 m3/cycle
C = 100 × (6.049/0.01031 - 1) = 586.6%,
which indicates that the clearance percentage is 586.6%.
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for the pulley system shown, determine the acceleration and velocity of block a after block b has fallen for 3 seconds from rest. block b accelerates at 0.5 m/s2. (0.25 m/s2, 0.75 m/s)
Answers
At the time when the Acceleration of b is 0.5 the acceleration would be 0.25 m/s2 and the velocity would be 0.75 m/s after 3 seconds of falling B.
The relation between the acceleration of 2 bodies in this situation will be as a1 = 2a2 where a1 is the acceleration of body1 and a2 is the acceleration of body2. So given the acceleration of the body at 3 seconds is 0.5 m/s2 so the acceleration of body1 would be half of the body1.
Similarly for velocity using v= u+ at ....(i). we can find the velocity of body1 as we have acceleration(a), time(t), And Initial Velocity(u).
u= 0 ................ (As the body starts from rest)
a = 0.25m/s2 .........(calculated on the basis of the acceleration of body2)
t = 3 Seconds ---(As given)
So from (i) we can say
v = 0+ 0.25*3 => v = 0.75 m/s
So the velocity of body 1 will be 0.75m/s after 3 seconds of falling down.
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