B) Light slows down when it passes into a denser medium.
B. Wrap more coils of wire around the nail
Increasing the number of coils in an electromagnet increases the strength of the magnetic field.
The rate of change of velocity per unit time is called acceleration.
Its SI unit is m/s².
Sure what do u need help with
The tension in the string with friction would be the biggest because of the involvement of the force of gravity. This would result in that the friction force that is acting on the system. There is no friction in the frictionless system, and only the force of gravity is relevant.
