The circuit below shows three resistors in series. R3>R2>R1. The resistors are all made of the same wire with the same diameter but have different lengths. Rank the magnitudes of the electric fields in the resistors from least to greatest.
A. E3
Answer: C
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Which of the following statements is true of Uranus when compared with Jupiter or Saturn?
A) Like Jupiter and Saturn, it radiates about the same amount of energy that it receives from the Sun. B) It has much less heat flowing out of its interior than Jupiter or Saturn. C) The composition of liquid metallic hydrogen in Uranus is similar to that of Jupiter and Saturn. D) Like Jupiter and Saturn, it rotates on its side, with its equator inclined about 25 degrees to its orbit.
Energy and Momentum: An object initially at rest suddenly explodes in two fragments of masses 2.6 kg and 3.3 kg that move in opposite directions. If the speed of the first fragment is 3.6 m/s, find the internal energy of the explosion.
A. 30 J B. 30 kJ C. 38 J D. 38 kJ
Potential Energy: A +3.0-µC point charge is initially extremely far from a positive point charge Q. You find that it takes 41 J of work to bring the +3.0-µC charge to the point x = 3.0 mm, y = 0.0 mm and the point charge Q to the point x = -3.0 mm, y = 0.00 mm. What is Q? (k = …)
A. 55 nC B. 9.1 µC C. 4.6 µC D. 27 pC