Answer:
Explanation:
As we know that there is no external horizontal force on the cannon ball + performer
So here total momentum of the system must be conserved
so we will have
now from above equation we have
It's the 3rd one bc they are produced by beta decay
Power = Energy / time
P = 482J/90s = 5.3556W
P = 5.3556W
Answer:
d. image is real is incorrect.
Explanation:
plane mirror always forms virtual and erect image, it can't be real because the image is not formed by the actual intersection of the rays.
Inertia: the plates over the tablecloth will try to stay in the same state of non movement. If there is minimum friction between the tablecloth and the objects standing on it, a rapid movement of the tablecloth does not change the state of the objects.
