2 years ago

Light travels in... A) electromagnetic waves B) electrons C) photons D) a and c

Physics

1 answer:

julsineya [31]2 years ago

4 0

Answer:

Light travels in electromagnetic waves.

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2 years ago

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Jobisdone [24]

Answer:

Option D- 1,2 and 3

Explanation:

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A cat dozes on a stationary merry-go-round, at a radius of 4.4 m from the center of the ride. The operator turns on the ride and

monitta

Answer:

The coefficient of static friction is 0.29

Explanation:

Given that,

Radius of the merry-go-round, r = 4.4 m

The operator turns on the ride and brings it up to its proper turning rate of one complete rotation every 7.7 s.

We need to find the least coefficient of static friction between the cat and the merry-go-round that will allow the cat to stay in place, without sliding. For this the centripetal force is balanced by the frictional force.

$\mu mg=\dfrac{mv^2}{r}$

v is the speed of cat, $v=\dfrac{2\pi r}{t}$

$\mu=\dfrac{4\pi^2r}{gt^2}\\\\\mu=\dfrac{4\pi^2\times 4.4}{9.8\times (7.7)^2}\\\\\mu=0.29$

So, the least coefficient of static friction between the cat and the merry-go-round is 0.29.

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2 years ago

If there is a gravitational force between all objects, why do we not feel or observe it?

Dmitry [639]

We do not feel the gravitational forces from objects other than the Earth because they are weak.

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Many scientific discoveries are made by chance. While studying one phenomenon, a scientist may discover a different one. Such wa

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One simple explanation is that planets move, while stars remained fixed in the sky. You can observe a planet's orbit, but a star will stay in the same position.

Explanation:

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