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2 years ago

Please need help on this

Physics

1 answer:

kirill115 [55]2 years ago

8 0

The frequency cannot change, as it depends on the source. now, imagine light as a particle, when it's going through glass, which is a denser medium than air, is more tightly packed with particles than air is. think of it this way, will you walk faster in a crowd or on an empty street? going through the empty street (air) there are lesser objects to bump into so what do you think will happen to the speed now?

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Answer:

a. It always points perpendicular to the contact surface.

Explanation:

"Normal" means perpendicular. Normal forces are always perpendicular to the contact surface.

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2 years ago

Number 10 and an explaination would be fabulous. thanks!

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3 years ago

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The collision between a hammer and a nail can be considered to be approximately elastic. estimate the kinetic energy acquired by

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Here we can use momentum conservation as in this type of collision there is no external force on it

$m_1v_{1i} + m_2v_{2i} = m_1 v_{1f} + m_2v_{2f}$

now here we can say

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now here we can say

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$v_{2f} = 3.375 m/s$

also we know that

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2 years ago

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Answer:

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Answer:

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In this case if enough heat is removed from the room the internal movement of the water particles will slow down causing the water to form crystal lattice thus forming ice. So, the water will freeze.

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