<span>Hello,
The answer is:
A vibrating tuning fork is struck and begins to vibrate as the object used to strike it is placed away from the tuning fork.</span>
Answer:
The correct option is A
Explanation:
From the question we are told that
The mass number is 
Generally the mean radius is mathematically evaluated as

Here
is a constant with a value 
So



could you please specify?
C Weight is the gravitational pull on an object