An ice skater is spinning at 5.2 rev/s and has a moment of inertia of 0.32 kg * m2.
calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 5.2 rev/s.
suppose instead he keeps his arms in and allows friction of the ice to slow him to 2.75 rev/s. what is the magnitude of the average torque that was exerted, in n * m, if this takes 12 s?

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

What sort of waves exhibit the doppler effect?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.