In a diagram of charges and electric field lines charge Q1has twelve field lines going outward from it and charge Q2has three field lines going into it. If one of the charges is 100 nC, what is the other one?
a. 25 nC
b. 100 nC
c. –25 nC
d. –100 nC
e. Both answers b and c can be correct.
c
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As you saw in Part A, Io's elliptical orbit is necessary to its tidal heating. This elliptical orbit, in turn, is a result of the orbital resonance among Io, Europa, and Ganymede. This orbital resonance causes Io to have a more elliptical orbit than it would otherwise, because __________.
a. Europa and Ganymede are unusually large moons b. all three moons orbit with the same period, staying aligned at all times c. Europa and Ganymede always pull on Io from the same direction as Jupiter pulls on Io d. Io, Europa and Ganymede periodically return to the same orbital positions, creating the same gravitational tugs
An electric car is designed to run off a bank of 15-V batteries with total energy storage of 2.1 × 10^7 J. If the electric motor draws 4 200 W in moving the car at a steady speed of 14 m/s, how far will the car go before it is "out of juice?"
a. 35 km b. 70 km c. 140 km d. 110 km e. 18 km
Temperatures in New York City are warmer in July than in January because Earth is closer to the Sun in July than in January.
Answer the following statement true (T) or false (F)
If the maximum possible accuracy in measuring the lifetime of a particle increases, the maximum possible accuracy in measuring its energy will
A) increase. B) decrease. C) not be affected.