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Vladimir79 [104]
3 years ago
6

Is energy absorbed or given off when an electron and a hole of a semi-conductor crystal

Physics
1 answer:
Nina [5.8K]3 years ago
7 0

Answer:

i have no clue XD

Explanation:

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A tennis player smashes a ball of mass m horizontally at a vertical wall. The ball rebounds at the same speed v with which it st
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Answer:

The magnitude of change in momentum is (2mv).

Explanation:

The momentum of an object is given by the product of mass and velocity with which it is moving.

Let the mass of ball is m. A tennis player smashes a ball of mass m horizontally at a vertical wall. The ball rebounds at the same speed v with which it struck the wall.

Initial speed of the ball is v and final speed, when it rebounds, is (-v). The change in momentum is given by :

p = final momentum - initial momentum

p=-mv-mv\\\\p=-2mv

So, the magnitude of change in momentum is (2mv).

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The presence of which phenomenon proved the predictability of the big bang theory?
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The measurement of the expansion of the universe was what gave rise to the big bang theory and it's predictions. 
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Romashka-Z-Leto [24]

Answer:

A car traveling south with its cruise control set

Explanation:

Turning could cause anything to slow down but going forward could mean that anything could go faster.

7 0
2 years ago
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d.

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