In a collision between two unequal masses, how does the impulse imparted to the smaller mass by the larger mass compare with the impulse imparted to the larger mass by the smaller one?

They are equal

Explanation:

Newton 3rd Law of motion states that for every force applied or action there is usually an equal and opposite force.

Impulse = Force * time

It is measured in Newton seconds.

The force and time of collision is the same which translates to an equal impulse by both scenarios.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.