A1938 nickel has a diameter of 21.21 mm, a thickness of 1.95 mm, and weighs 0.04905 n. what is its density?

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

Amarble, a bowling ball, a basketball, and a baseball are rolling across the floor at 10 m/s. which one has the greatest kinetic energy? the marble the bowling ball the basketball the baseball

What happens to the light rays when they hit the specimen?