PHYSICS HIGH SCHOOL

the length of time it takes a planet to revolve around the sun is equivalent to witch of the following?

Answers

Answer 1
Answer: it really depends on how far or close the planet is from the sun
Answer 2
Answer:

Answer:

The length of its year.

Explanation:

When Earth completes a full rotation, a year has completed. So, the same can be the same for other orbiting planet. The moon for example takes  29.5 days to revolve around the Earth, so one moon year is   29.5 Earth days.

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Why does a moving object come to a stop on a frictional surface? a.The object’s kinetic energy is transformed into mainly heat energy. b.The object’s potential energy is transformed into mainly kinetic energy. c.The object loses all its energy in deformation. d.The object’s kinetic energy is transformed into mainly potential energy.

-3 < -1Which sentence correctly translates the sentence shown here?
A) Negative three is to the left of negative one on the number line.
B) Negative three is to the right of negative one on the number line.
Eliminate
C) Negative three and negative one are to the right of 0 on the number line.
D) Negative three and negative one are on opposite sides of 0 on the number line.

Answers

Answer:

The Answer is D

Explanation:

I know because I just took the test.

Answer:

answer is D

Explanation:

The control group in an experimental study will __________.

Answers

Answer:

receive no treatment during the experiment

Explanation:
Give you something to compare your results with. It's always nice to be able to see what changes have been made to the original, even if it's not technically the original (I know that was worded weird, I just don't know how else to explain it.) Hope this helped!

A skater goes down a hill with a constant acceleration of 2.25 m/s2 for 50 meters. If the skater's final velocity was 20 m/s, calculate her initial velocity.

Answers

Answer:

The initial velocity of the skater is 13.22 m/s.

Explanation:

Given that,

Acceleration of the skater, a=2.25\ m/s^2

Distance covered, d = 50 m

The skater's final velocity was, v = 20 m/s

We need to find the initial velocity of the skater. It can be calculated using third equation of motion as :

v^2-u^2=2ad\n\nu=√(v^2-2ad) \n\nu=√((20)^2-2* 2.25* 50) \n\nu=13.22\ m/s

So, the initial velocity of the skater is 13.22 m/s. Hence, this is the required solution.

Learn more,

Kinematics

https://brainly.in/question/10299229

Answer:

Vi = Vf - (a * t) just plug this in.

Vi stands for “initial velocity”

Vf stands for “final velocity”

a stands for “acceleration”

t stands for “time”

_____ kilometers per second is the approximate speed of light.a. 300
b. 3,000
c. 30,000
d. 300,000

Answers

300,000 kilometers per second is the approximate speed of light.

Why do paradigms change over time

Answers

Paradigms is a pattern or a model. They shift as a change in a way of thinking to another conclusion. After an amount of time they switch/shift into another pattern/position. 

If frequency is kept constant, how are the velocity and wavelength of a wave related?

Answers

Answer;

Velocity and wavelength are directly proportional when frequency is kept constant.

Explanation;

  • Frequency of a wave is the number of complete oscillations made by a given wave in one second.
  • Wavelength on the other hand, is the distance between two successful crests or troughs in a transverse wave or two successful rarefactions or compressions in a longitudinal waves.
  • The speed of a wave is given by the product of the frequency of a wave and the wavelength.
  • Speed = Frequency × wavelength,
  • Therefore, if frequency is kept constant, then the speed of a wave is directly proportional to the wavelength, such that an increase in wavelength increases the speed of the wave and vice versa.
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