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

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

A2.0 μf capacitor and a 4.0 μf capacitor are connected in series across a 0.827-kv potential. the charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. find the voltage across each capacitor.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.