[10 points]

on a trampoline if you run around enough, you will build up a electrical charge in your socks that eventually shocks you when you touch something afterwards correct? why does this happen? explain? is it a certain material in your socks? why does this

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Amass weighing 24 pounds, attached to the end of a spring, stretches it 4 inches. initially, the mass is released from rest from a point 8 inches below the equilibrium position. find the equation of motion. (use g = 32 ft/s2 for the acceleration due to gravity.)

Could we see a galaxy that is 20 billion light-years away?