When an α-particle of mass ‘m’ moving with velocity ‘v’ bombards on a heavy nucleus of charge ‘Ze’, its distance of closest approach from the nucleus depends on m as:

The power in a circuit having voltage V and current I during time interval t is:

What is the power rating of a device that draws 1.75 A of current when connected to a 180-V source?

The work done by a constant force of 5 Newton acting on a body is 5 joules. The displacement of the body in the direction of the applied force is ______.