Aperson drives to the top of a mountain. on the way up, the personís ears fail to ñpop,î or equalize the pressure of the inner ear with the outside atmosphere. the pressure of the atmosphere drops from 1.010 x 105 pa at the bottom of the mountain to 0.998 x 105 pa at the top. each eardrum has a radius of 0.40 cm. what is the pressure difference between the inner and outer ear at the top of the mountain?

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

Which articulations allow for greatest range of motion?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.