A popular demonstration involves a professor, initially motionless, standing on a low-friction turntable and holding a bicycle wheel that is spinning horizontally. What happens when the professor flips the bicycle wheel so that it is spinning in the other direction?
1.She starts to spin in the same direction as the initial direction of the bicycle wheel.
2.She starts to spin in the bicycle wheel's new spin direction.
3.She remains stationary.
4.It is impossible to tell because it depends on how fast the bicycle wheel initially spins.
1
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Fission is used in
a. atomic bombs. b. power plants. c. energy for stars. d. hydrogen bombs. e. a tokamak reactor.
When an alpha particle is emitted from an unstable nucleus, the atomic number of the nucleus
A) decreases by 2. B) increases by 4. C) increases by 2. D) decreases by 4. E) increases by 6.
When you adjust a telescope to get a clear image of Saturn's rings, in a small but measurable way you alter
A) the telescope. B) Saturn's rings. C) both of these D) neither these
A 120-mH inductor is in series with a 20-? resistor and a variable capacitor that can range from 0.110 ?F to 0.400 ?F
(a) What is the range of possible resonance frequencies? (b) If the power supply is a 24-V rms source, what rms current flows at resonance?