Answer:
Explanation:
Given
diameter of spacecraft 
radius 
Force of gravity
=mg
where m =mass of object
g=acceleration due to gravity on earth
Suppose v is the speed at which spacecraft is rotating so a net centripetal acceleration is acting on spacecraft which is given by






P=w/t
w=15
t=3
therefore, 5 watts (b)
Answer:
Technically everything has somewhat of a magnetic field. I guess
Answer:
I don't know why you are asking me?