1. Given the circuit, below, assume that the two switches begin closed. (a) (10 points) Draw and label the currents in the circuit. Determine the equivalent resistance of the circuit. (b) (5 points) Determine the total power dissipated by the circuit, when both switches are closed. (c) (5 points) List, from highest power dissipation to lowest power dissipation, the following set-ups for the circuit. Both switches closed; switch 1 open and switch 2 closed; switch 1 closed and switch 2 open; both switches open. (d) (5 points) Explain, in two to three sentences, why the set-up at the top of your list has the highest power dissipation. g

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?

No matter what energy transformation we discuss, we know that no energy transfer is 100% efficient. you are about to enter a bicycle rave. you have trained extensively and eaten well to maximize your energy input throughout the bicycle race. you know that some of your kinetic energy will become wasted energy in the form of heat. what is the source of the heat energy and how can you minimize it to maximize the efficiency of your performance in the race? a) you are the source of the heat energy. you can minimize the heat energy but selecting the appropriate clothes to wear. b) air resistance is the source of he heat energy. you can minimize the air resistance by your position while riding the bicycle. c) friction is the source of the heat energy. you can minimize the friction by lubricating all appropriate parts and keeping the tires well inflated. d) kinetic energy is the source of the heat energy. you can reduce the production of heat energy but minimizing the energy you expend to race on the bicycle.