An alpha particle is a nucleus of helium. it has twice the charge and four times the mass of the proton. when they were very far away from each other, but headed toward directly each other, a proton and an alpha particle each had an initial speed of 3.1×10−3 c, where c is the speed of light. what is their distance of closest approach? there are two conserved quantities. make use of both of them. (c = 3.00 × 108 m/s, k = 1/4πε 0 = 8.99 × 109 n · m2/c2, e = 1.60 × 10-19 c, m proton = 1.67 x 10-27 kg)

7.study the scenario. a small container of water with a low temperature is poured into a large container of water with a higher temperature. which choice correctly explains what happens to the thermal energy of these systems? the smaller container of water has more heat and thermal energy than the larger container. some heat and thermal energy is transferred to the larger container of water. the larger container of water has more heat and thermal energy than the smaller container. some heat and thermal energy is transferred to the smaller container of water. the larger container of water has more thermal energy and some of that energy is transferred to the colder water in a process known as heating. the smaller container of water has more thermal energy than the larger container, and some of that energy is transferred to the warmer water in a process known as heating.