10. A 15-W compact fluorescent light bulb is used in a lamp plugged into a 120-V wall socket. You can assume the lamp itself has zero resistance. Find (a) the resistance of the light bulb (b) the maximum current through the bulb the maximum power used by the light bulb

Two lightbulbs both operate on separate 120 V sources. One has a power of 40 W and the other is 80 W. Which of the following is true? o a. they have the same current flowing o b. the 80 w bulb has more current flowing O c. the 40 W bulb has a lower resistance o d. they have the same resistance

P10

12. A lightbulb uses 4 A when it is connected across a 120 V source. What is the resistance in the resistane = V Vano -301 210-3012 lightbulb? 13. What is work? the transfer of energy by a force object agit is Displaced acting on by vitve opergy which a body possesses 14. What is kinetic energy? tion 15. What is potential energy? energy that is waiting to be a 16. A boy pushes on a parked car with a force of 111 N. The car does not move. How much work does the boy do on the car? Explain your answer. Work : Owork becasue the car. didn't move 17. In the absence of air resistance, how would the acceleration of a 2.0 kg book and the acceleration of a 3.3 kg rock differ if the objects were dropped from the same height? 18. What are Newton's three laws of motion (summarize them)? ject will not Law I an Change unle torce is acted on gecond low, the force On un object is equal! mass & its accelertion 3 law, when 2 bu interact they apply Forces to each oth 19. If your weight is 777 N, how much…

6. In the figure R1 = 6.65 N, R2 = 20.0 N, and the ideal battery has emf ɛ = 13.9 V. How much energy in J is dissipated by all four resistors in 0.02017 hour? R1 R R2 ww (a) 1.98x10² (b) 1.05x103 (c) 2.02x10³ (d) 1.83x10³ (e) None of the above

Resistor 1 has a resistance twice that of resistor 2. The two resistors are wired in parallel to a battery. The ratio of dissipated power by resistor 1 and the power dissipated by resistor 2 is. a) 1/4 b) 2 c) 1/2 d) 10