What is the de Broglie wavelength of an electron whose kinetic energy is 1.0 eV?
A) 520 nm
B) 8.2 nm
C) 0.64 nm
D) 52 nm
E) 1.2 nm
E
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A series circuit consists of ac source, a 90-? resistor, a 0.80-H inductor, and an 80-?F capacitor
The frequency of the source is adjusted so that the capacitive reactance is equal to twice the inductive reactance. What is the frequency of the source? A) 14 Hz B) 13 Hz C) 16 Hz D) 17 Hz E) 19 Hz
Two moles of an ideal gas fill volume V = 10 liters at pressure P = 2.4 atm. The gas is thermally insulated from the surroundings. A membrane is broken which allows the gas to expand into the new volume which is 3 times as large as the old volume. The new pressure is:
1.0 kilometer equals ___________ nanometers.
a. 
b. 
c. 
d. 
What have studies of sunquakes, or helioseismology, revealed?
A) The Sun vibrates only on the surface. B) "Sunquakes" are caused by similar processes that create earthquakes on Earth. C) The Sun generates energy by nuclear fusion. D) Our mathematical models of the solar interior are fairly accurate. E) Neutrinos from the solar core reach the solar surface easily.