7. Name three radiations and their wavelength range which are invisible and beyond the violet end of the
visible spectrum

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

What is the coefficient of kinetic friction μk between the block and the tabletop?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?