The part of river's current moves at a 1.486 m/s speed.
the distance between two points, objects, lines, etc. Remoteness is the quality of being physically separated from another thing or person. a line drawn in the universe. To walk seven miles in one hour would be too time-consuming.
The difference between the change in distance and the change in time is used to compute the rate of change.
Rate: times the distance Time
The distance is 16.5 miles, and the time is 5.5 hours.
If we enter this into the formula above, it yields:
16.5 - 5.5 / 10.9 - 3.5 = 11/7.4 = 1.486 m/s is the rate of change.
Calculations show that the constant rate of change is 1.486 m/s.
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a ball is thrown horizontally from the top of a building 29.8 m high. the ball strikes the ground at a point 48.2 m from the base of the building. the acceleration of gravity is 9.8 m/s 2 . find the time the ball is in motion. answer in units of s.
The ball will be in motion for about 2.44 seconds due to the free-fall.
What do you mean by free-fall?Free fall is any motion of a body in which gravity is the only force acting on it according to Newtonian mechanics. A body in free fall experiences no force according to general relativity, which reduces gravitation to space-time curvature. When something is in "free fall" in a technical sense, it may not necessarily be going down in the traditional sense of the word. Normally, an object traveling upwards might not be thought of as falling, but if it is solely being affected by gravity, it is said to be in free fall. As a result, the Moon is falling freely around the Earth, even if its fast orbital speed keeps it far from the planet's surface.
According to the question:
the ball is in motion for time, t = ?
initial velocity along y direction = 0
along y direction; h = 1/2gt²
from the above equation:
t = √2h/g
t = √(2×29.8)/9.8
t = 2.44seconds
Hence the ball will remain in motion for about 2.44seconds under free fall.
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A cannon is fired horizontally from the top of a platform, with a velocity of 18m/s. If the cannon ball
lands 162m away from the base of the platform, How long does it take for the cannon ball to hit the
ground? How tall is the platform?
I
The time cannon ball to hit the ground is 9s and length of platform is 1,458 m.
Equation :To calculate time taken by cannon ball hit ground we use formula,
speed = distance / time
s = d / t
As given,
s is 18m/s
d is 162m
t = ?
Putting the values,
18m/s = 162m / t
t = 162m / 18m/s
t = 9 s
To calculate length of platform,
length = distance x time taken to hit the ground
l = 162m x 9s
l = 1,458 m
Velocity :When an object is moving, its velocity is the rate at which its direction is changing as seen from a specific point of view and as measured by a specific unit of time. a vector measurement of the motion's velocities. Simply put, velocity is the rate of movement in a single direction. Velocity can be used to gauge both the speed of a rocket launching into space and the speed of a car traveling north on a busy freeway.
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the help is very much appreciate!! thank you and please hurry
The direction of the final velocity of the space shuttle flying north at 6,510 m/s, then accelerating at 28.4 m/s² for 60.0 seconds in the northeast direction I is approximately north 8.9° east.
How can the final direction of the velocity be calculated?The velocity of the space shuttle in the northeast direction after 60.0 seconds is therefore;
v = 28.4 × 60 = 1704
Which gives;
(vf)² = 6510²+1704²-2×6510×1704×cos(135)
(vf)² = 67383000.3975
vf = √(60971643.616) ≈ 7808.43
7808.43/sin(135) = 1704/sin(x)
x = arcsine (1704/(7808.43/sin(135)))
x ≈ 8.9°
The direction of vf is therefore;
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Planet building occurs through the process of ____, which involves the clumping of small particles into larger masses.
Planet building occurs through the process of accretion which involves the clumping of small particles into larger masses.
What is accretion?Its spatial period is known as the wavelength, which in physics is the distance that a periodic wave cycles across. It is a characteristic of both traveling waves and standing waves as well as other spatial wave patterns. It is the separation between two successively related wave points of the same phase, such as two close-by crests, troughs, or zero crossings. The inverse of the wavelength is known as the spatial frequency. It is commonly denoted by the Greek letter lambda, which is also known as the "wavelength." Also usually referred to as having a wavelength are the sinusoidal wave envelopes, modulated waves, and waves produced by the interference of several sinusoids. When a sinusoidal wave is thought to be moving at a constant speed, the relationship between wavelength and frequency is inverse.
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Find the work done by winding up a hanging cable of length 26 ft and weight density 2 lb/ft. round your answer to two decimal places, if necessary.
The work done by winding up a hanging cable of length 12 ft and weight density of 2 lb/ft is 676 ft/lb.
Consider that the entire hanging cable is lifted by 26 feet and there is a weight density of 2 pounds per feet.
Then, the work done by hanging is
W = ∫2x dx from 0 to 26
W = 676 ft/lb.
When a force moves something over a distance, work is done. The energy transferred, or work done, can be calculated by multiplying the force by the distance moved in the direction of the force.
Work done = force × distance moved in the direction of the force = energy transferred.
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Light can be described in terms of wavelength, or as consisting of small packets of energy called? ions. photons. electrons. pulsars.
Light consisting of small packets of energy called photons
Even though light mostly behaves like a wave, it can also be claimed that it is composed of tiny energy packets called photons. Despite being light and thin, photons are always energetic. The energy of a photon changes with wavelength; longer wavelengths have less energy than shorter ones. Red photons, for instance, have lower energy than blue ones.
Scientists believed that electromagnetic radiation was only made up of waves up until about 1900. Then, Max Planck and others found that some metals and other materials release electrons when exposed to light while studying the photoelectric effect. They believed that more electrons would be released from the metal as brightness or intensity rose.
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The radius of the galaxy is 3x1020 m. how fast would a spaceship have to move to cross from one edge of the galaxy to the opposite edge in 300 years as measured by a clock onboard the spaceship?
The speed will be equal to 6.67 x 10¹⁷ meters per year.
What is speed?Speed is defined as the ratio of the time it takes for a body to cross a distance to the time it takes. Since it is a scalar quantity, speed cannot be represented by a direction.
Given that the radius of the galaxy is 3x1020 m. The time to cross one edge to another edge of the galaxy is 300 years.
The speed will be calculated by using the formula below:-
S = ( 2 x 3 x 10²⁰ ) / 300
S = 6.67 x 10¹⁷ Meters per year.
Therefore, the speed will be equal to 6.67 x 10¹⁷ meters per year.
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A car is rolling backwards when I hit the gas after 8.2 five seconds it is movie Florida 8.62 M/s is 12.9m to the right of its starting point
The correct answer -5.49 m/s.
The data is provided as follows.
Initial velocity (u) =?, Final velocity (v) = 8.62 m/s.
Time is 8.25 seconds, and the distance is 12.9 meters.
As a result, the following formula can be used to determine beginning velocity.
v = v_0 + at
8.62 m/s = v_0 + a×8.25
v_0 = 8.62-8.2a ____(1)
s = v_0×t +1/2 a ×t^2 _____(2)
As a result, enter the value from equation (1) into equation (2) in the manner described below.
s =8.62m/s-8.25a×t+1/2 a×t^2 ______(3)
Now enter the following values for s and t into equation (3).
12.9 m = (8.62-a×8.25)×8.25+1/2 a× (8.25)^2
a= 1.71 m/s^2
As a result, the value of initial velocity using equation (1) will be as follows.
v_0=8.62-8.25×1.71
v_0=-5.49 m/s
As a result, we may say that the car's beginning speed is -5.49 m/s.
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If light from one star is 40 times brighter (has 40 times more flux) than light from another star, what is their difference in magnitudes?
The difference between the magnitudes of stars will be 4.0 magnitudes.
What is the Magnitude of a Star?The term magnitude is used to refer to a star's brightness.
Two different magnitudes are used by astronomers to describe stars. The brightness of the star as seen from Earth is known as its apparent magnitude. The perceived brightness is the basis for the magnitude scale. Astronomers can use this to establish the star's exact absolute magnitude. The real brightness of the star is measured by its absolute magnitude.
According to the question, the difference between the magnitude of two stars will be :
[tex]m_b-m_a[/tex]=2.5 log([tex]I_A/I_B[/tex]) where,
[tex]m_a[/tex] and [tex]m_b[/tex] is the magnitude of star A and Star B and,
[tex]I_A[/tex] and [tex]I_B[/tex] is the intensity of star A and Star B
As per the given value, the intensity ratio of the two stars is :
[tex]I_A/I_B[/tex]=40
So, by using the formula :
[tex]m_B-m_A[/tex]=2.5 log([tex]I_A/I_B[/tex])
=2.5 log (40)
=4.0 magnitudes.
Hence, the magnitude difference between two stars is 4.0 magnitudes.
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An electric motor delivers a shaft torque of 15 lb. ft at 1800 rpm. what is the motor power?
The power of the motor is 3.82 kilowatt.
Shaft torque of the electric motor = 15 lb-ft = 20.3 Nm
Revolution per minute made by the electric motor = 1800 revolutions per minutes
The angular velocity of the electric motor is,
[tex]Angular \: velocity = \frac{ 2 \times π \times revolutions}{60} [/tex]
[tex]w = \frac{2 \times \pi \times r}{60}[/tex]
[tex]w = \frac{2 \times 22 \times 1800}{ 7 \times 60}[/tex]
[tex]w = 188.5 \: rad/s[/tex]
The angular velocity of the electric motor is 188.5 rad/s.
The power of the motor is,
[tex]Power = torque \times angular \: velocity[/tex]
[tex]P = τ \times w[/tex]
[tex]P = 20.3 \times 188.5[/tex]
[tex]P = 3826.5 \: watt[/tex]
[tex]P = 3.82 \: kilowatt[/tex]
Therefore, the power of the motor is 3.82 kilowatt.
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a 2.50 kg block, sitting on the floor, is attached to a wall by a spring with a spring constant of k
The force exerted on the block by the spring is 89.7 N and it will experience an acceleration of 35.8 m/s².
Mass of the block = 2.5 kg
Spring constant of the spring = 115 N/m
Change in the length of the spring = 78.5 cm = 0.78 m
Friction = 0
The force exerted on the block by the spring is,
[tex]Spring \: constant = \frac{Force }{ Change \: in \: length \: of \: the \: spring}[/tex]
[tex]k = \frac{F}{x}[/tex]
[tex]F = x \times k[/tex]
[tex]F = 0.78 \times 115[/tex]
[tex] = 89.7 \: N[/tex]
The force exerted on the block by the spring is 89.7 N.
It will experience an acceleration of,
[tex]Force= mass \times acceleration[/tex]
[tex]F = m \times a[/tex]
[tex]a = \frac{F}{m} [/tex]
[tex]a = \frac{89.7}{2.5} [/tex]
[tex] = 35.8 \: m/s ^{2} [/tex]
Thus, it will experience an acceleration of 35.8 m/s².
Therefore, the force exerted on the block by the spring is 89.7 N and it will experience an acceleration of 35.8
m/s².
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A soccer ball was kicked toward the goal. The horizontal component of velocity was 22 m/s and the vertical component was 12 m/s. What is the magnitude of the resultant velocity of the soccer ball?.
The magnitude of the resultant velocity of the soccer ball is: 25.059 m/s
The formula for projectile motion that we will use to solve this exercise is:
vf= √[v(x)² + v(y)²]
Where:
vf= final velocityv(x)= horizontal component of velocityv(y)= vertical component of velocityInformation about the problem:
v(x)= 22 m/sv(y)= 12 m/svf=?Applying the final velocity formula we have:
vf= √[v(x)² + v(y)²]
vf= √[(22 m/s)² + (12 m/s)²]
vf= √[484 m²/s² + 144 m²/s²]
vf= √[628 m²/s²]
vf= 25.059 m/s
What is projectile motion?The projectile motion is the motion whose trajectory describes a parabola having a horizontal and a vertical component of motion.
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A 230 000 v-rms powerline carries an average power pavg = 250 mw a distance of 200 km. if the total resistance of the cables is 10 ohms, what is the resistive power loss?
the resistive power loss is 12 MW(megha watt)
Given One, the ademas voltage is 23, and the average power is stated as 2 50 MW (megha watt). Their average output will be between 15 and 10.06 watts or 2.50 megawatts when they view the entire planet. According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them. As a result, V = RI, where R is the resistance constant. R is dependent on the conductor's dimensions as well as its composition
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Please answer in complete sentences
The x axis shows the type of product while the y axis can be used to show the percentage.
What is a bar chart?The bar chart is one of the ways to present data. It involves the use of long bars to represent the dependent variable. We know that data presentation is a very vital part of information presentation.
Now, if we look at the chart, we can see that there are two axes, the x and the y axis. In either case, the axis mean something!
The x axis shows the type of product while the y axis can be used to show the percentage.
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Calculate the components of the following projectile's velocity
1. v = 35 m/s 0 = 15° vx =, vy=
2. v = 35 m/s 0 = 30° vx = , vy=
3. v= 35 m/s 0 = 45° vx = ,vy=
Projectile motion is the motion of an object thrown (projected) into the air. After the initial force that launches the object, it only experiences the force of gravity. The object is called a projectile, and its path is called its trajectory. As an object travels through the air, it encounters a frictional force that slows its motion called air resistance. Air resistance does significantly alter trajectory motion, but due to the difficulty in the calculation, it is ignored in introductory physics.
the components of the following projectile's velocity into X- the axis and Y - axis
1. vx = 35 cos15° and vy sin15°
2. vx = 35 cos30° and vy sin30°
3. vx = 35 cos45° and vy sin45°
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In one or two sentences, explain how Rutherford’s model of an atom changed scientific knowledge and describe the evidence that justified the model.(2 points)
From the Rutherford's model of the atom, the electron moves round in orbits as the planets moves round the sun.
What is Rutherford model of the atom?According to the Rutherford's model of the atom, the electron moves round in orbits as the planets moves round the sun. The nucleus is at the focus of concentric ellipses.
This model solved the riddle of the experiment of Rutherford which suggested large positively charged core at the center of the atom and not the large sphere of positive and negative charges as previously opined by Thompson.
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the brakes on ned’s overland truck malfunction, but he continues to drive it. unable to slow down, he crashes through a guardrail and careens off the road. in ned’s suit against overland, the truck maker can raise the defense of
The brakes on Ned's overland truck are broken, but he continues to drive them. unable to slow down, he crashes into a guardrail and pulls off the road. in the case of ned versus overland, the truck manufacturer can raise the defense of assumption of risk
Define assumption of risk?In situations when the plaintiff has voluntarily assumed the risk of such acts, the common law doctrine known as "assumption of risk" states that the plaintiff is ineligible to claim damages from a negligent party. Sometimes, prospective plaintiffs assume the risk of harm and absolve prospective defendants of all responsibility. This was once an affirmative defense open to defendants, but in most countries, it has since been supplanted by complicity and comparative negligence.
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Select three true statements I need help quick
Answer:
TrueFalseFalseTrueTrueTrueExplanation:
A neutral atom will always have same number of protons and electrons no wonder the amount of neutrons.They have a slight difference between so they are not the same.As I stated neutral atom will always have same number of Protons and Electrons do not mistake Neutron for it.Everything that takes up space and has mass is called matterAtoms are also know as building blocksIt is made from tiny atom particlesHope everything's clear!
Goodluck
For a hanging mass of 0.061 kg and string density equal to 0.00040 kg/m, what is the velocity of a wave traveling down the string?
For a hanging mass of 0.061 kg and string density equal to 0.00040 kg/m, the velocity of a wave traveling down the string is 39m/s.
What is velocity?Velocity is defined as a vector measurement of the rate and the direction of motion. Put simply, velocity is the speed at which something moves in the one direction. The speed of a car traveling north on a major freeway and speed of a rocket launching into the space can both be measured using velocity.
The SI (international) units for the velocity are m/s (meters per second), but velocity may also be expressed in any units of distance per time. Other units include the miles per hour (mph), kilometers per hour (kph), and kilometers per second (km/s).
Velocity measures the motion starting in one place and heading toward another place. The practical applications of the velocity are endless, but one of the most common reasons to measure velocity is to determine how quickly you (or anything in motion) will arrive at a destination from a given location.
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The study of moving charges is a. hydrodynamics b. hydrostatics c. electrodynamics d. el ectrostatics
Answer:
c. Electrodynamics...
The study of moving charges is electrostatics, which is in option e. Electrostatics is the branch of physics that deals with the study of stationary or non-moving electric charges and their interactions. Hence, option e is the correct answer.
Electrostatics is a fundamental branch of electromagnetism, which is a branch of physics that deals with the study of electromagnetic phenomena. Specifically, electrostatics focuses on the behavior of electric charges that are at rest or not in motion. It involves the study of electric charges, electric fields, and the forces that arise between charged objects. Hence, option e is the correct answer.
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Ki is making lemonade using a lemonade powder mix. Which scientific property of water is demonstrated by the lemonade powder dissolving into water, making lemonade?
A. Solubility
B. Cohesion
C.Adhesion
D. Capillary Action
Answer:
Solubility
Explanation:
Solubility involves dissolving a substance
How many electrons are there in the antibonding sigma 1s molecular orbital for a he2?
He2's molecular orbital energy-level diagram is shown in figure 3c. Both the 1s bonding and 1s antibonding orbitals must have two electrons for a total of four valence electrons.
What is antibonding molecular orbital?
An antibonding orbital is a form of molecular orbital that, according to the theory of chemical bonding, weakens the chemical link between two atoms while assisting in increasing the energy of the molecule in relation to the separated atoms. Such an orbital has one or more nodes in the area where the nuclei are bonded together. Outside of the bonding zone, where the orbital's electron density is concentrated, one nucleus is drawn away from the other, which tends to generate mutual repulsion between the two atoms. This is in contrast to a bonding molecular orbital, which is in charge of chemical bonds and has a lower energy than that of the individual atoms.
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A mass attached to a spring is displaced from its equilibrium position by 5cm and released. The system then oscillates in simple harmonic motion with a period of 1s. If that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case?.
Time interval stays the same = 1 sec in this case.
Because, T = 2 pi (m/k)^1/2 is independent of displacement depends on mass and the same in both situations spring constant.
What is the interval of time?
The length of time between two specific moments in time is known as a time interval. Here's an illustration: "The period between three and four o'clock is one hour." Different units are used to describe different lengths of time, and some units are more suited to particular periods of time than others.
A second is the shortest unit of time we would utilize on a daily basis. And a day is made up of 24 hours. A watch or a clock can be used to record these time units. A calendar is necessary if you want to measure longer periods of time.
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How to draw wavelength in physics
Wave length photo attachment
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A 400kg hollow steel flywheel energy storage with 2m outer diameter and a thickness of 225mm spins at 6000rpm. with 80fficiency, how long it will support 100kw load?
t = 497.2 sec
outer diameter, Do=2a
thickness, t= 0.225m. Inner diameter, Di= 2-2*0.225
= 1.55m
mean Radius = 0.8975m.
I= moment of inertia of flywheel
= 400 * (0.8875)^2
=315.0625 kgm^2
w = 200 π rad/s
K.E of flywheel = 1/2 Iw^2
= 62190844.73 joule
= 100x10^3*t ÷ 0.8
t = 497.2 sec
moment of inertia is the tendency of a body to resist rotation or angular motionthe moment of inertia depend on he mass of the object and the way the mass is distributed relative to the axis of rotationinertia is the tendency to resist motion moment of inertia is a inertial propertyTo know more about moment of inertia visit : https://brainly.com/question/15246709
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hayashi 2004 ), temperature-electrical conductivity relation of water for environmental monitoring and geophysical data inversion,
hayashi 2004 ), temperature-electrical conductivity relation of water for environmental monitoring and geophysical data inversion,
electric conductivity (EC) is often used to map infected groundwater, separate movement hydrographs, and screen the mixing of sparkling and salt water. considering EC is temperature-structured, it's far essential to file the recorded EC values at various temperatures as matching to a widespread temperature. typically, a random consistent is hired for temperature repayment under the belief that the EC-temperature courting is linear (as an instance, a upward thrust of two% in EC each 1 °C). The EC-temperature relationship of natural waters with wildly dissimilar compositions and salinities is tested on this research. The EC-temperature dating changed into slightly nonlinear within the 0–30 °C temperature variety, however the linear equation got here as a substitute near describing it.The temperature correction issue for 25 °C ranged from 0.0175 to zero.0198, with an average price of 0.0187.
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13. Which personality trait helps you to use straightforward and confident communication with others?
A. Neurotic
B. Absentminded
C. Shy
D. Assertive
The personality trait which helps you to use straightforward and confident communication with others is referred to as Assertive and is therefore denoted as option D.
What is Communication?This is defined as the process in which information is passed or exchanged from one person or place to another through various means and forms.
Assertiveness is a personality which is characterized by self assuredness without exhibiting aggressiveness in making points clear to other people.It is also known as a straightforward and confident communication with others.
This is therefore the reason why option D was chosen as the most appropriate choice.
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Answer: assertive
Explanation:
The composition and properties of a(n) _______ are always constant throughout a given sample and from sample to sample.
Answer:
object material or a bodie
what are some of the everyday phenomena that you can observe that indicate an interaction between two charged objects?
The interaction between two like-charged objects is repulsive. The interaction between two oppositely charged objects is attractive.
What is charge?A charge is any of various amounts, for example, the electric charge in electromagnetism or the variety charge in quantum chromodynamics. Charges compare to the time-invariant generators of a balance bunch, and explicitly, to the generators that drive with the Hamiltonian. Charges are in many cases meant by the letter Q, thus the invariance of the charge compares to the evaporating commutator[Q,H]=0, where H is the Hamiltonian. Hence, accuses are related of moderated quantum numbers; these are the eigenvalues q of the generator Q. A charge is any generator of a persistent balance of the actual framework under study. At the point when an actual framework has a balance or the like, Noether's hypothesis infers the presence of a moderated current. The "streams" in the current is the "charge", the charge is the generator of the (neighborhood) balance bunch. This charge is once in a while called the Noether charge. Charge is denoted by Q.
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Which of the following is NOT a pure substance? milk oxygen carbon dioxide
Answer:
milk...................