Answer:
The answer an be the option A.
Explanation:
Because radioactive substances have atomic number greater than 82.
As per Einstein's theory of relativity we know that when an object will move with the speed comparable to the speed of light then the length of the object will be different from its length at rest position
This is also known as length contraction theory
As we know here that

so here we know that
v = 0.95 c
so from above equation we will have


so here the length will be SHORTER
Answer:
579600J
Explanation:
Given parameters:
Height of the building = 828m
Weight of the man = 700N
Unknown:
Work done by the man = ?
Solution:
The work done by the man is the same as the potential energy expended.
Work done:
Work done = Weight x height = 700 x 828
Work done = 579600J
The answer is True. Acceleration is a vector quantity.
There is need 4.5 hours to fill the pool in case if both pipes are open