Which of these can be used to induce a current in a closed circuit without the use of a battery or an electrical power supply?

A) a gravitational field

B) a high temp field

C) a nuclear field

D) a magnetic field

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)