In separate experiments, four different particles each start from far away with the same initial speed and impinge directly upon the nucleus of a gold atom. The masses and charges of the particles are:

particle 1: mass m, charge q.
particle 2: mass 2m, charge 2q.
particle 3: mass 2m, charge q/2.
particle 4: mass m/2, charge 2q.

Rank the particles according to the distance of closest approach to the gold nucleus from smallest to largest.

a. 1,2,3,4
b. 4,3,2,1
c. 3, 1 and 2 tie, 4
d. 4, 1 and 2 tie, 3
e. 1 and 2 tie, 3, 4

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

You are the coordinator for a program that is going to take place at night in a rectangular amphitheater in the mountains. you will have no access to any electricity, but you must be able to illuminate the entire grounds. you know the intensity of the light from a lantern varies inversely as the square of the distance from the lantern. suppose the intensity is 90 when the distance is 5 m. a. write an equation to model the situation. b. solve for the constant of variation. c. write the equation to model the situation using the constant () of variation. d. you have been given lanterns with 40 light intensity. use your equation to solve for the distance from the lantern. e. you need to illuminate 225 km. how many meters do you need to light? f. how many lanterns will you need?

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