A45kg ice skater stands at rest on the ice. a friend tosses the skater a 5kg ball. the skater and the ball then move backwards across the ice with a speed of 0.5 m/s. what was the speed of the ball at the moment just before the skater caught it?

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked

What os the equation of the line described below written in slope-intercept form? the line passing through point (0,0) and parallel to the line whose equation is 3x+2y-6=0