Which of the following is a property of light waves and NOT of sound waves?
A) frequency
B) wavelength
C) amplitude
D) polarization
E) none of the above
Answer: D
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In a parallel RLC circuit, where IR = IR, max sin(?t), the current through the capacitor, IC, is
a. IC = ?IC, max sin(?t). b. IC = IC, max sin(?t). c. IC = ?IC, max cos(?t). d. IC = IC, max cos(?t). e. IC = IC, max tan(?t).
A skilled ballet dancer appears to move in a seemingly floating motion, seeming to defy gravity in a grand jeté. Part of how this is done is by:
a. moving her arms and legs to keep her center of mass at the about same height above the ground. b. moving her arms and legs to cause her center of mass to move upward while falling. c. being supported from the ceiling by a hidden cable not visible to the audience. d. moving her arms and legs so that as her center of mass moves, she keeps her head at the same height above the ground. e. moving her arms and legs so that her center of mass is kept from accelerating downward.
The following images represent four types (wavelength bands) of light. Rank these from left to right based on the amount of each that is emitted (as thermal radiation) by Earth’s surface, from greatest to least. If you think that two (or more) types should be ranked as equal, drag one on top of the other(s) to show this equality.
A stable electron orbit cannot exist if its circumference is
A) a single wavelength. B) 2 wavelengths. C) 2.5 wavelengths. D) any of the above E) none of the above