Many people are familiar with the fact that a rifle recoils when fired. this recoil is the result of action - reaction force pairs. a gunpowder explosion creates hot gases that expand outward allowing the rifle to push forward on the bullet. consistent with newton's third law of motion, the bullet pushes backwards upon the rifle. the acceleration of the recoiling rifle a) greater than the acceleration of the bullet. b) two times greater than the acceleration of the bullet. c) the same size as the acceleration of the bullet. d) smaller than the acceleration of the bullet.

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?