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 8.5e-3c, 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

The slope of a good speed time indicates ? a. velocity b. acceleration c. direction d. speed

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.