Alarge wooden turntable in the shape of a flat uniform disk has a radius of 2.00 m and a total mass of 100 kg . the turntable is initially rotating at 4.00 rad/s about a vertical axis through its center. suddenly, a 65.0-kg parachutist makes a soft landing on the turntable at a point near the outer edge.
1. find the angular speed of the turntable after the parachutist lands. (assume that you can treat the parachutist as a particle.)2. compute the kinetic energy of the system before and after the parachutist lands. why are these kinetic energies not equal?

Describe the path of the electric current through a circuit?

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?