Answer:

Explanation:
Initial angular speed of the player is given as

here we know that

now we know that


now its speed comes to zero in 0.2 s
so angular acceleration is given as



Because many objects in space don't radiate any optical (visible) radiation at all.
And other objects, like stars, radiate a lot of invisible radiation in addition to the
visible light from them. So the ability to detect and measure invisible radiation
makes it possible to learn a lot more about objects in space than we could if
we could only use their visible light.
Answer: In places of hot climate it is advised that the outer wall of houses be painted white because white color reflects heat and the houses do not heat up too much.
Answer:
The solutions to this exercise is B. 400N
Explanation:
Any two uses of magnetic force are:-
- It is used in factories for lifting heavy metals.
- It is used by opthalmologist for taking out the small metallic particles from eyes .