Calculate the thickness of the patient skin if 40%of the incident X-rays were absorbed by his flesh, let the absorption coefficient be 2units​

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

Sound is a disturbance that travels through a medium as a

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?