Which two phrases describe the nature of the strong nuclear force? O A. Is an example of a contact force B. Acts as a result of opposite charges D C. Acts between protons and neutrons O D. Is one of the fundamental forces​

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.

What sort of waves exhibit the doppler effect?