Which of the identical light bulb(s) is(are) brightest when the capacitor has half its maximum charge?
A. A
B. B
C. C
D. A and B
E. All three are equally bright.
Answer: B
You might also like to view...
A rock is thrown from the edge of the top of a 100-ft tall building at some unknown angle above the horizontal. The rock strikes the ground a horizontal distance of 160 ft from the base of the building 5.0 s after being thrown. Assume that the ground is level and that the side of the building is vertical. Determine the speed with which the rock was thrown
a. 72 ft/s b. 77 ft/s c. 68 ft/s d. 82 ft/s e. 87 ft/s
Momentum: Two air track carts move along an air track towards each other. Cart A has a mass of 450 g and moves toward the right with a speed of 0.850 m/s. Cart B has a mass of 300 g and moves toward the left with a speed of 1.12 m/s. What is the total momentum of the two-cart system?
A. 0.047 kg ? m/s toward the right B. 0.719 kg ? m/s toward the right C. 0.719 kg ? m/s toward the left D. 0.750 kg ? m/s toward the right E. 0.750 kg ? m/s toward the left
An astronaut traveling with a speed v = 0.90c holds a meterstick in his hand. If he measures its length, he will obtain a value of
A. 1.0 m B. 2.3 m C. 0.19 m D. 0.43 m E. 0.81 m
A lens that is curved inwards at the center on both sides so that the lens has greater thickness at its edges is called
a) a convex lens. b) a refracting lens. c) a converging lens. d) a concave lens.