4. What is the resultant displacement of a hiker that goes 8.0km[W], 5.0km[E], 9.1km[58 S of E], and finally 7.4km[N35 E)?

The plum pudding model of the atom states that ?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

The molecular mass of a gas is (select all that apply) a. independent of the type of gas b. the same number as the atomic (or molecular) mass, but measured in grams c. dependent on the temperature d. the mass of a mole of the gas