Nonmetals do not conduct electricity or eject electrons when hit by photons.
What is an insulator?An insulator is a material that does not allow electric current to pass through it. A metal is a material that is able to conduct electricity. We know that metals are able to conduct electricity and are also able to eject electrons when hit by photons.
All these goes back to the nature of the metals and the nonmetals. We know that the difference between the valence band and the conduction band in nonmetals is so wide. This prevents the promotion of electrons from the valance band to the condition band.
As such, nonmetals do not conduct electricity or eject electrons when hit by photons.
Learn more about nonmetals:https://brainly.com/question/2273750?
#SPJ1
NEED HELP ASAP CURRENTLY FAILING!!!
You need to be at the Houston International Airport by 4pm to make your flight. You are currently in Helotes
which is 213 miles away. If you leave at 12:30 pm, what will your average speed need to be to make it to the airport on
time
Explanation:
12:30pm -> 04:00pm = 3hrs 30mins
3hr 30mins= 3.5hrs
average speed=total distance/total time
=213÷3.5
=60.8571428571
round to 2 decimal places
=60.86 mph
. A 2 kg ball is thrown with an acceleration of 40 m/s². What is the
force exerted on the ball?
When a 2 kg ball is thrown with an acceleration of 40 m/s². The
force exerted on the ball is 80 N.
According to Newton's second law of motion
F = ma
where, F = force exerted on the object, m = mass of an object and a = acceleration of the object.
Here, m = 2 kg, a = 40 m/s². so, F = ?
Therefore, force (F) exerted on the ball = 40x2 = 80 N
Learn more about Force here:
https://brainly.com/question/13191643
if we break the acceleration of this missile into two components, in the vertical and horizontal direction, what statement correctly characterizes the source of the acceleration?
Both horizontal and vertical acceleration is produced by the jet engines. While it does contribute to vertical acceleration, gravity has no effect on horizontal acceleration.
What is acceleration?The term acceleration has to do with the change in the velocity with time. We know that velocity is a vector quantity hence we have to look at the magnitude and the direction of the quantity.
In the same vein, acceleration is a vector quantity. As such we could resolve it into the vertical and the horizontal directions just as we can do for velocity.
The true statement of the situation when we break the acceleration of this missile into two components, in the vertical and horizontal direction, is that; both horizontal and vertical acceleration is produced by the jet engines. While it does contribute to vertical acceleration, gravity has no effect on horizontal acceleration.
Learn more about acceleration:https://brainly.com/question/12550364
#SPJ1
If the equilibrium constant for a b c is 0.157, then the equilibrium constant for 2c 2a 2b is:__________
If the equilibrium constant for A + B = C is 0.157, then the equilibrium constant for 2C = 2A + 2B is 40.6.
What is Equilibrium Constant?
The equilibrium constant (K) of a chemical reaction is the relationship between the products and reactants when a chemical reaction reaches equilibrium. The equilibrium constant of concentration (Kc) of a chemical reaction at equilibrium is defined as the ratio of the concentration of products to the concentration of the reactants, each raised to their respective stoichiometric coefficients.
At equilibrium, Rate of the forward reaction = Rate of the backward reaction
Mathematically, it can be stated as:
[tex]r_f=r_b\\k_f\times \alpha\times [A]^a[B]^b=k_b\times \alpha\times [C]^c[D]^d[/tex]
To learn more about equilibrium constant, refer to:
brainly.com/question/20534053
#SPJ4
An auto dealer has 4 different cars and 6 different trucks. how many ways are there to select two vehicles?
There are C different ways to choose two different automobiles (12, 2).
In mathematics, a choice is made from a set of various components where the order of the choices is unimportant (unlike permutations).
For instance, there are three conceivable combinations of two given fruits, such as an apple, an orange, and a pear: an apple and a pear; an orange and an apple; or an orange and a pear. Formally speaking, a set S's k unique components make up a subset known as a k-combination. In other words, two combinations are same only if all of their members are the same.
Learn more about combination here:
https://brainly.com/question/19692242
#SPJ4
8. Paige dropped a ball out of a car while her friend Destiny was traveling at a velocity of 25
m/s. The ball underwent a deceleration of -2m/s² and rolled to a stop on the pavement. How
long did it take the ball to stop?
Answer:
I think it's 12.5s
Explanation:
Bare with me, because I just started physics, but I think I have the answer right... Hopefully.
starting with your knowns, we know velocity is 25 m/s from the problem. you also can figure out your acceleration, -2 m/s.
You're looking for the time it takes until the ball stops rolling. Your time is unknown.
Your equation would be a=v/t (acceleration being a, velocity being v, and time being t)
You have to solve for t giving you t=v/a
Now you have to fill in your numbers. t=25m/s divided by -2m/s^2
Your answer should end up as -12.5
You have to solve for your units, but since you're finding time it's pretty straightforward in knowing you're dealing with seconds.
Hope this helped... :) sorry if it didn't-
If you pipetted 20.00ml of a liquid into a pre weighted beaker and determined that this liquid had a mass of 34.719 what is its density?
Density of liquid is ρ = 1.735 [tex]g/cm^{3}[/tex].
What is Density ?Density of liquid is determined by using formula
ρ = m/v
ρ = 34.719/20
ρ = 1.735 [tex]g/cm^{3}[/tex]
It is possible to measure a material's density by how closely it is packed. The mass per unit volume is how it is formally defined. Density Symbol: ρ or ρ = m/V, where ρ stands for density, m for mass, and V for volume.
The amount of "stuff" that is contained in a certain amount of space is measured by density. In comparison to the softer, lighter element gold, a block of the heavier element lead (Pb) will have a higher density (Au). Less dense than a brick is a block of Styrofoam. Mass per unit volume is how it is referred to.
Both absolute and relative densities are common; they are the two forms of density.
To learn more about Density from the given link:
brainly.com/question/15164682
#SPJ4
vector a has a magnitude of 31 units and points in the positive y-direction. when vector b is added to a, the resultant vector a b points in the negative y-direction with a magnitude of 16 units. find the magnitude and direction of b.
The correct answer is 47 units.
Arrows typically serve as a vector's geometric representation. The magnitude of the vector is determined by its length and the direction in which the arrow is pointing. When two vectors have the same magnitude and direction, they are said to be equal. Additionally, the magnitude and direction of vectors are unaffected by the vector's position.
A quantity with both magnitude and direction is referred to as a vector quantity. One example of a vector quantity is velocity. A two-dimensional vector can be expressed as,
A=A_Xi+A_Yj
Vector A=31 j
A+B=-16 j
Thus vector B is
B=(A+B)-A
B=(-16j)-31j
B=(-47)j
As a result, vector B has a magnitude of 47 units and is oriented in a negative Y direction.
To learn more about vector quantity refer the link:
https://brainly.com/question/3482586
#SPJ4
If h is the water's height, the volume of the water is v = r2h. we must find dv/dt. differentiating both sides of the equation gives the following. dv dt = r2
If h is the height of the water, then the volume of water is v = r2h. We get [tex]dv/dt[/tex] equal to 0.00994 m/min.
Here, radius = 8m
We have, [tex]V = \pir2h[/tex]
[tex]dV/dT= (\pir2) dh/dt[/tex]
[tex]dV/dT= (\pi82) dh/dt[/tex]
[tex]dV/dT= (\pi64) dh/dt[/tex]
Given [tex]dV/dT = 2[/tex]
Therefore, [tex]dh/dt = 2/(64\pi) = 0.00994 m/min[/tex]
From the definition = a by way of integrating the preliminary velocity, v(0), and the consistent acceleration, one might also find the velocity at a later time, t.
(value of acceleration) means the rate of change of significance of the speed with recognize to time. then again |
| approach the magnitude of the price of change in speed with recognize to time (i.e. the importance of acceleration).
Know more about the magnitude :
https://brainly.com/question/17312902
#SPJ4
A neon lamp indicator draws a current of 0.5A. How many electrons are moving through the lamp per second? Charge on the electron= -1.6 x 10-¹⁹ C
The number of electrons is 1.9 * 10^20 electrons.
How many electrons move through it?We know that it is possible to obtain the charge that the electron carries by the use of the formula;
Q = It
Q = magnitude of charge
I = current
t = time taken
Now we have the charge as;
Q = 0.5 A * 60 s = 30 C
Given that;
Q = ne
Q = charge
n = number of electrons
e = magnitude of electronic charge
n = Q /e = 30 C / 1.6 x 10-¹⁹ C
n = 1.9 * 10^20 electrons
Learn more about electron charge:https://brainly.com/question/2553023
#SPJ1
you sit in a car that is moving at an average speed of 86.4 km/h. during the 3.3 s that you glance out the window, how far has the car traveled?
The distance travelled or how far the car has travelled in 3.3 second at constant speed of 86.4 km/h is 79.2 m.
What is speed?The speed of an object, also known as v in kinematics, is a scalar quantity that refers to the size of the change in that object's position over time. The average speed of an object over a period of time is calculated by dividing its distance traveled by the length of the interval. Velocity and speed are different concepts. Distance divided by time is the dimension of speed. The meter per second (m/s) is the metric unit used to measure speed.
Speed of car= 86.4 km/h
Since time is given in seconds, converting to km/h to m/s. For converting km/h to m/s, dividing the value given in km/h by 3.6
86.4 km/h= 86.4/3.6 m/s
= 24 m/s
Distance travelled= Velocity* Time
= 24 * 3.3
= 79.2 m
To learn more about speed ,visit:
https://brainly.com/question/6280317
#SPJ4
What would the shape of the graph be if a speed of 50.0 km/hr is maintained from
10 s to 20 s? I
Answer:
The graph would increase constantly as shown above until it reached 50m/s. At 10s, the graph would be flat at 50m/s until 20s.
Explanation:
Arlo throws a rock down with speed 14 m/s from the top of a 30 m tall cliff. what is the rock's speed just as it hits the ground?
The rock's maximum speed just as it hits the ground is 28m/s.
Given that the initial speed of the rock is u = -14m/s. (speed taken as negative because the rock thrown down from the cliff)
The height of the tower is h=30m.
Taking height of the tower as origin, then final position of the rock is s= -h= -30m.
On applying the second equation of motion:
s= ut +¹/₂ at²
-30 = -14t+0.5×(-9.8)t²
4.9t²+14t-30=0
On Solving the equation we get, t=1.43s.
To calculate that final speed when rock hits the ground, we apply first equation of motion:
v=u+gt
v=-14+(-9.8)(1.43)
v=-28m/s.
To learn more about Equations of motion, refer this link
https://brainly.com/question/5955789
#SPJ4
What are some best practices for different exercises and sports performed:
at high altitude?
in hot weather?
in cold weather?
An analog voltage is in the range 0v to 5v. if it can be measured with an accuracy of /- 50mv (100 mv steps), at most how many bits of information does it convey/represent?
The correct answer is 5.64.
Since the analogue signal is divided every 100 mV for accuracy of 50 mV, we have 50 discrete observations from 0 to 5V. Thus
It's given that the accuracy is +/- 50mV. This essentially means that the length of interval of permissible accuracy is 100mV.
Now, it's given that the analog voltage range is 0-5 V. So, the number of discrete points in 0-5V will be as follows:
50V/100mV.
Upon solving, it comes out to be 50.
The number of bits is defined by the formula log_2n, where n is the number of discrete points.
In this case, n = 50. Putting the value in the formula,
No of bits = log_2 50
Upon solving,
No of bits = 5.64
To learn more about analog voltage refer the link:
https://brainly.com/question/9895306
#SPJ4
Can an object be charged negatively with the help of a positively charged object?.
Answer:
Sure...it can be
Explanation:
When a positively charged body is brought near the neutral body, the body is negatively charged through electrostatic induction.
• At contact, the negative charges of a body are attracted to the near end of that body hence neutralization.
• When the positively charged body is removed and the body is earthed, it remaims negatively charged.
[tex]{}[/tex]
kepler's first law states that a planet moves around the sun in a(n) group of answer choices circle, with the sun at the center. elliptical orbit, with the sun at one focus. elliptical orbit, with the sun on the minor axis of the ellipse. elliptical orbit, with the sun at the center of the ellipse.
Kepler's first law states that a planet moves around the sun in an elliptical orbit, with the sun at one focus.
What are planets?Planets are large bodies in space which orbit round a star such as the Sun.
The Sun and the planets that orbit around it form the solar system.
The movement of the planets around the Sun is described as planetary motion.
Planetary motion is descried in Kepler's laws of Planetary motion.
The Kepler's laws of Planetary motion are given as follows:
every planet's orbit is an ellipse with the Sun at one focus.a line joining the Sun and a planet sweeps out equal areas in equal timesThe square of a planet's orbital period is proportional to the cube of the length of the semi-major axis of its orbit.In conclusion, planets orbit around a star.
Learn more about planetary motion at: https://brainly.com/question/3649072
#SPJ1
A piece of copper foil has a mass of 3.1118 g, a length of 12.10 cm, and a width of 11.67 cm. assuming the foil has a uniform thickness, what is its thickness in units of mm?
The correct answer is 0.024cm.
The density of a substance determines how heavy it will be in a given volume. It is technically the mass of that material per unit volume. It is implied by this that a specific material weighs a specific quantity relative to its volume.
A substance's density determined how heavy it would be at a particular size. It is an inherent quality that is not affected by geography, such as a shift in the globe.
density of copper = 8.93 g/cm3
mass = 3.1118 g
Density= mass/volume
8.93= 3.1118 /volume
volume=3.1118/8.93
=0.348 cm^3
Volume = l×b×t
T= volume/ l×b
=0.348 cm^3/12.10×11.67
=0.348 /141.2
=0.0024×10mm
=0.024cm
To learn more about density refer the link:
https://brainly.com/question/14112788
#SPJ4
All solenoids that operate on alternating current must have a(n) ____________________ coil.
Answer:
Shading coil
Explanation:
The shading coil prevents the solenoid vibrate
Hope this helps
A student placed a short candle and a slightly taller candle in a small dish filled with baking soda as
shown in the figure. The child then lights both the candles and poured vinegar into the dish of baking
soda.
Baking Soda +
Vinegar
(a) What happens to the candles? Why? In what order?
(b) Mention one precaution the student needs to follow while pouring the vinegar into the dish of
baking soda.
a) As carbon dioxide is formed the shorter candle's flame goes off first, followed by the taller candle. This shows, that in absence of air, the flame goes off. Hence, the air is necessary for combustion.
b) Although both reactants are common home chemicals and foods, care should be taken to avoid splashing in the eyes, and protective clothing should be used. The reaction's byproducts can be disposed of by thoroughly filling the sink with water and washing down the sink with no chemicals touched.
Baking soda and vinegar react with one another to create carbon dioxide gas. The carbon dioxide gas sinks to the bottom of the bowl because it is heavier than the air around it. More and more carbon dioxide gas is produced as the reaction progresses, progressively filling the bowl as it does so. The flame will go out owing to a shortage of oxygen once the level of carbon dioxide reaches that of the flame.
Learn more about the necessity of air for combustion here:
https://brainly.com/question/334789
#SPJ9
calculate the magnitude of the electric field (in n/c) at 4 m from a point charge of 3.9 µc. you should round the answer to an integer, indicate only the number, do not include the unit. hint: 1µc
The magnitude of magnetic field is 2194 N/C
Given,
r = 4 m
Q = 3.9 µC
Q = 3.9 × 10⁻⁶ C
Let, the electric field is " E "
E = (k × Q/r²)
E = (9×10⁹×3.9×10⁻⁶/4²)
E = 2193.75 N/C
E = 2194 N/C
A magnetic discipline is a vector field that describes the magnetic affect on moving electric prices, electric powered currents, and magnetic substances. A shifting charge in a magnetic subject reviews a pressure perpendicular to its personal velocity and to the magnetic area.
To learn more about electric field, visit: https://brainly.com/question/11110675
#SPJ4
A cheetah is running at a speed of 18.0 m/s in a direction of 54° north of west. Find the components of the cheetah's velocity along the following directions.
(a) the velocity component due north
b) the velocity component due west
The velocity component due north of the cheetah is 14.56 m/s.
The velocity component due west is 10.58 m/s.
Component's of the cheetah's velocity
The component's of the cheetah's velocity is calculated as follows;
velocity component due northVy = V sinθ
Vy = 18 m/s x sin(54)
Vy = 14.56 m/s
velocity component due westVx = V cosθ
Vx = 18 m/s x cos(54)
Vx = 10.58 m/s
Thus, the velocity component due north of the cheetah is 14.56 m/s.
The velocity component due west is 10.58 m/s.
Learn more about velocity component here: https://brainly.com/question/24681896
#SPJ1
Calculate the potential energy of a person who weighs 80n standing on top of the sunshine bridge 300 meters in the air
73.5 kilojoules are the answer. Since we can compute potential energy, we can convert 250 into 9.8 into 30 into 73500 joules, or u equal to m g h. Consequently, the body's potential energy will be 73500 joules, which is the necessary amount.
This potential energy calculator allows us to calculate the amount of energy that an elevated object has stored inside it. The full name of this effect is gravitational potential energy, and it refers to the energy that an item stores as a result of its height or vertical position.
The great wrecking ball of the crane. The ball's gravitational potential energy depends on both its mass and how high it is elevated. The relationship between gravitational potential energy and an object's mass and height is seen in the following equation:
PE Gravity equals (m, h, and g). The formula is rather simple to comprehend. The height of a non-raised object will be zero, and as a result, it will have no potential energy.
Learn more about potential energy here-
https://brainly.com/question/24284560
#SPJ4
Ice is melting a.conclusion b.observation c.experimentation d.inference
Answer:
b. Observation
Explanation:
You see ice melt in an experiment, so you record that as one of your observations.
A projectile is fired straight up from the south pole of earth with an initial speed vi = 15km/s. find the speed of the projectil when it is very far from the earth, neglecting air resistance
The calculated value is 2.5×10⁷ m.
Velocity is a term that describes the speed and direction of a point's motion. For example, a circular path's direction is always perpendicular to a line from the point to the circle's center. A point always moves in a direction that is tangent to its path (a radius). A vector measurement of the rate and direction of motion is what is meant by the term "velocity." Simply said, velocity is the rate of movement in a single direction.
From energy conservation, since the velocity will be 0 at highest point,
1/2 m (10000) ²− GMm/R
=− GMm/d
=10⁸/2 −(9.8) (6400000)
=−(9.8) *(6400000) ²/d
d≈2.5×107 m
Answer is 2.5×10⁷ m.
Learn more about velocity here-
https://brainly.com/question/18084516
#SPJ4
If a fisherman applies a horizontal force with magnitude 42.5 nn to the box and produces an acceleration of magnitude 3.60 m/s2m/s2, what is the mass of the box?
The mass of the box is 11.80N
CalculationF= 42.5
a=3.60 m/[tex]s^{2}[/tex]
m=?
F=ma
m=F/a = 42.5/3.60
m=11.80N
Concept of force.The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
Which three notions of force are there?Thrust, which increases an object’s velocity; drag, which decreases an object’s velocity; and torque, which causes changes in an object’s rotational speed, are all concepts connected to force.
To know more about force visit:
https://brainly.com/question/13191643
#SPJ4
kangaroos are strong jumpers and can leap over an object 1.8m high, calculate a kangaroo's minimum vertical speed when it leaves the ground
The kangaroo's minimum vertical speed when it leaves the ground is 5.94 m/s
Data obtained from the questionFrom the question given above, the following data were obtained:
Maximum height (h) = 1.8 mFinal velocity (v) = 0 m/s (at maximum height) Acceleration due to gravity (g) = 9.8 m/s²Initial velocity (u) =?How to determine the initial velocity of the kangarooThe inintial velocity of the kangaroo can be obtained as illustrated below:
v² = u² – 2gh (since the ball is going against gravity)
0² = u² – (2 × 9.8 × 1.8)
0 = u² – 35.28
Collect like terms
u² = 0 + 35.28
u² = 35.28
Take the square root of both side
u = √35.28
u = 5.94 m/s
Thus, the minimum vertical speed of the kangaroo when it leaves the ground is 5.94 m/s
Learn more about motion under gravity:
https://brainly.com/question/22719691
#SPJ1
I just need an answer to question 3. Please explain how to solve it.
Displacement has to do with the change of position with time in a specified direction.
What is the displacement?The term displacement has to do with the change of position with time in a specified direction. Now let us proceed to solve the questions individually.
1) Displacement = x2 - x1 = 4.27 - 9.2 = -4.93 m
2) Velocity = displacement/ time = x2 - x1/t2 - t1 = 4.27 - 9.2/4.81 - 1.54
= -4.93 m/3.27 = -1.5 m/s
3) The average speed is obtained from;
9.2/1.54 + 4.27/4.81
= 5.97 + 9.08
= 15.05 m/s
Learn more about about displacement:https://brainly.com/question/11934397
#SPJ1
which is the movement of thermal energy from a region of higher temperature to a region of lower temperature?
The correct answer is convection.
Convection is the physical movement of material particles that transfers heat from a location of greater temperature to a region of lower temperature.
Convection is a heat-transfer process in which heat energy is transferred by the mass movement of fluid molecules, such as those found in gases and liquids. Under normal circumstances, gases and liquids are poor heat conductors, yet they are nonetheless capable of transferring heat.
Other than through diffusion, advection, or both, convection is the method used to transfer heat. Solids don't experience convection because the particles that make them up don't move.
To learn more about Convection refer the link:
https://brainly.com/question/16635311
#SPJ4
hich statement about niels bohr’s atomic model is true? higher orbits have lower energies. each orbit has a specific energy level. electrons can exist in any energy level. orbits close to the nucleus have no energy.
Every type of orbit has a specific energy level is the statement of Niels Bohr’s atomic model that is true in this context related as to the atomic model.
What does the Bohr atomic model state?According to the Bohr model, electrons orbit the nucleus at constant energies. Higher energy levels are also present in all orbits that are farther from the nucleus.
Here in, the Light is released as energy when any kind of electrons drop to a kind of lower energy level.
A known, the five elements are created by incredibly tiny particles called atoms when John Dalton first proposed the atomic hypothesis.
Atoms of various elements have different kinds of sizes, masses, and physical-chemical properties, which cannot be possibly separated.
Niels Bohr has further also developed a model that was totally focused on the quantum paradigm in response to this hypothesis.
Exactly what orbit has the most energy?The orbits that have the maximum orbital energy can be seen as 7s,5f,6d,7p.
Since every electron has kind of the same amount of charge, repulsion is what makes these electrons to stay as far apart as possible.
To know more about orbital energy visit:
https://brainly.com/question/14944601
#SPJ4