Answer:
90 N
Explanation:
The force applied to the ball is given by:

where
is the change in momentum of the ball
is the time taken
The change on momentum of the ball is:

So, the force applied is

1. I think is letter b.
2. I thinks it's letter c.
Answer:
C
Explanation:
During an investigation you want to investigate different variables.
Answer:
Option B (1.51 m)
Explanation:
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Tsunami and under water volcano