Answer:
I want to say your answer is D) Electric
Answer:
False
Explanation:
The moment of inertia for a rigid body is given by

where
is the density distribution of the object
r is the distance from the axis of rotation of the object
Essentially, the moment of inertia does not depend only on the mass of the object, but also on its shape. For example: for a solid cylinder, the moment of inertia derived from the formula above is

where M is the mass of the cylinder and R is its radius. As we see, I (moment of inertia) does not depend on the mass only: therefore, if two objects have same moment of inertia, this does not imply that they also have the same mass.
Answer:
#efficiency
1.Efficiency=MA/VR *100%
2.It is expressed in percentage
3.Efficiency of machine can never be 100%
#velocity Ratio
1.VR=Ed/Ld
2.It don't have any unit
Answer:
The no. of electrons is 
Solution:
According to the question:
The rate at which the charge is delivered is given by:

Now,



No. of electrons, n can be calculated from the following relation:
Q = ne
where
e = electronic charge =
Thus

