3 years ago

EXERCISE 1

1 answer:

5 0

.........The answer is A

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Damm [24]

Answer:

Explanation:

If it is a flat mirror, the reflection and incidence are the same -- 40 degrees.

If it is anything else, more information is needed.

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3 years ago

nadya68 [22]

Answer:

18.33 Ns

Explanation:

As the pitch back speed has the opposite direction as before, the change in velocity would be

$\Delta v = v_2 - v_1 = 29 - (-10) = 39 m/s$

So the change in momentum of the ball would be the product of its velocity change and its mass

$\Delta p = \Delta v m = 39 * 0.47 = 18.33 kgm/s$

This is equals to the impulse acted on the ball by the bat, which is 18.33 Ns

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3 years ago

devlian [24]

It depends on the objects chemical composition.

6 0

3 years ago

nalin [4]

The answer would be the sound waves.

4 0

3 years ago

spin [16.1K]

Answer:

with teamwork

Explanation:

you need to use team work so the right answer is C

7 0

3 years ago