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Tems11 [23]
3 years ago
14

A student runs up a flight of stairs which info is not needed to calculate the rate of the student is doing work against gravity

A the height of the flight of stairs B the length of flight of stairs C the time taken to run up the stairs D the weight of the student
Physics
1 answer:
NikAS [45]3 years ago
8 0

Answer:

B.

Explanation:

Given that a student runs up a flight of stairs which info is not needed to calculate the rate of the student is doing work against gravity A the height of the flight of stairs B the length of flight of stairs C the time taken to run up the stairs D the weight of the student

The rate of doing work is known as power.

Power = work done/time

Work done = energy = mgh

Since energy = mgh

Where mg = weight

And h = height

Time = time taken to run up the stairs.

Time, weight mg and height h will be needed while the Length of the flight is therefore not needed.

The correct answer is B.

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What do astronomers use in addition to parallax to find the actual distance of stars that are close to Earth?
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Answer:

trigonometry (guessing)

Explanation:

ellipse: is the shape of an orbit : looks like an oval

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https://science.howstuffworks.com/question224.htm

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https://www.space.com/30417-parallax.html

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blossoms.mit.edu

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