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3 years ago

PLEASE HELP AS SOON AS POSSIBLE ILL MARK BRALIEST TO WHOEVER IS CORRECT

Physics

1 answer:

Reptile [31]3 years ago

3 0

Answer:

There are two significant figures in 2.200 x 10^7

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How fast can Usain Bolt run if it takes him 9.9 s to run 100m?

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Answer:

27.8 mph

Explanation:

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3 years ago

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Janet jumps off a high diving platform with a horizontal velocity of 2.06 m/s and lands in the water 1.8 s later. How high is th

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2 years ago

What happens when a sound wave passes from oil into air? A. the sound wave slows down and bounces back B. the sound wave slows d

Jlenok [28]

Oil is optically denser than water. When sound/light goes from optically denser medium to optically rarer medium, their velocity increase and they moves away for normal.

<h3>Appropriate Answer:</h3>

The sound wave speeds up and bends

$\Large{ \underline{ \boxed{ \pink{ \bf{Option \: (D)}}}}}$

As, In optics we learnt that light undergoes refraction when travels from medium of different densities. Similarly, Sound also follows the law of refraction.

It is due to the change of speed of water in different mediums, This makes it speed up or down depending upon the medium and their densities.

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3 years ago

Will xenon react with nitrogen and why

Andreyy89

No, xenon wont react with nitrogen.

This is because xenon is a noble gas and noble gases only react with other elements under very unusual circumstances.

I hope this has helped you.

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3 years ago

True or False An object will slow down and stop as long as no forces act upon it

My name is Ann [436]

Answer:

false

Explanation:

Understand Newton’s first law of motion. Experience suggests that an object at rest will remain at rest if left alone, and that an object in motion tends to slow down and stop unless some effort is made to keep it moving. An object will go on forever if there were no forces to act upon it. In space, a rocket will go forever at the speed it projects.

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