The answers to question 4 d
Answer:
120 km/h
Explanation:
This is a case of a parabolic motion. For this kind of motion the horizontal component of the velocity does not change in the complete trajectory. That is:

Then, the velocity of the ball at the moment in which the catcher caught the ball is:

the velocity of the ball is 120 km/h.
Explanation:
Sorry I don't know the answer
Answer:
1)SI is coherent system of units
2) SI is rational system of units
Answer:
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Explanation:
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