Answer:

Explanation:
Here as we know that total angular momentum is always conserved for child + round system
so here by angular momentum conservation we have

here we have
(inertia of boy)


now we have




Answer:
YES
Explanation:
Gravity acts as the centripetal force and the velocity earth has keeps it from falling on the sun.
A window is the most transparent object from these, so that is the answer.
Answer:
Night vision is when you can see in the dark or at night like owls
Explanation:
Initial velocity = Vo= 25 m/s
Final velocity = V = x
Acceleration= a = 6 m/s^2
time= t = 4 seconds
Appy the equation:
V = Vo + at
Replacing:
V = 25 + 6(4) = 25 + 24 = 49 m/s