Ball a has half the mass and eight times the kinetic energy of ball
b. what is the speed ratio va / vb ?

The ph of your mouth is very similar to that of stomach. true or false?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?