Ten coulombs of charge start from the negative terminal of a battery, flow through the battery and then leave the positive terminal through a wire, flow through a resistor, and then return to the starting point on this closed circuit. In this complete process, the ten coulombs:
a. receive heat energy from the resistor.
b. do positive work on the battery.
c. have a net loss of potential energy.
d. have no net change in potential energy.
Question 2
A 40-kg boy is standing on the edge of a stationary 30-kg circular platform that is free to rotate. The boy tries to walk around the platform in a counterclockwise direction. As he does:
a. the platform doesn't rotate.
b. the platform rotates in a clockwise direction just fast enough so that the boy remains stationary relative to the ground. c. the platform rotates in a clockwise direction while the boy goes around in a counterclockwise direction relative to the ground. d. both go around with equal angular velocities but in opposite directions.
Energy flow through an ecosystem.
Energy flow and chemical recycling in ecosystems.
Negative feedback control of the female reproductive hormones
Positive and Negative Symptoms of Schizophrenia
Climate models the flow of mass and energy
Velocity of Blood Flow