(a) Calculate Earth's average speed relative to the Sun. (b) What is its average velocity over a period of one year?

Physics

1 answer:

JulsSmile [24]3 years ago

8 0

i think more info needed.

radius of orbit, eg

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Calculate the amount of work done if you use a 100 N force to push a 50 kg box 5 m across the kitchen floor.

gogolik [260]

Work = force * distance
force = 100 N
Distance = 5m
work =100 N* 5m
=500 J

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A 68.5‐kg astronaut is doing a repair in space on the orbiting space station. She is at rest relative to the space station. She

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Answer:

The velocity of astronaut will be 0.105 m/s in opposite direction of the tool.

Explanation:

Given that,

Mass of the Astronaut, m = 68.5 kg

Mass of the the tool, m' = 2.25 kg

Speed of tool, v' = -3.2 m/s (direction is sway from space station)

It is required to find the speed of the astronaut. The momentum will remain conserved. So,

$mv=m'v'$

v is the speed if Astronaut

$v=\dfrac{m'v'}{m}\\\\v=\dfrac{2.25\times (-3.2)}{68.5}\\\\v=-0.105\ m/s$

So, the velocity of astronaut will be 0.105 m/s in opposite direction of the tool.

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When light travels from one medium to another with a different index of refraction, how is the light's frequency and wavelength

lbvjy [14]

Answer:

The frequency does not change, but the wavelength does

Explanation:

Here are the options

A. When a light wave travels from a medium with a lower index of refraction to a medium with a higher index of refraction, the frequency changes and the wavelength does not.

B. The frequency does change, but the wavelength remains unchanged.

C. Both the frequency and wavelength change.

D. When a light wave travels from a medium with a lower index of refraction to a medium with a higher index of refraction, neither the wavelength nor the frequency changes.

E. The frequency does not change, but its wavelength does.

When light goes through one medium to the next, the frequency doesn't really change seeing as frequency is dependent on wavelength and light wave velocity. And when the wavelength shifts from one medium to the next.

$n= \frac{C}{V} \ and\ \frac{\lambda_o}{\lambda_m}$