The mean free path of a molecule is 
m in an ideal gas at standard temperature and pressure. What is the mean free path when the pressure of the gas is doubled and the temperature is constant?
A. 
B. 
C. 
D. 
E. 
B.
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Power: A series circuit has a 100-? resistor, 4.00-mH inductor and a 0.100-?F capacitor connected across a 120-V rms ac source at the resonance frequency. What is the power dissipated by the circuit?
A. 100 W B. 120 W C. 144 W D. 160 W E. 45.8 W
A solid nonconducting sphere (radius = 12 cm) has a charge of uniform density (30 nC/m3) distributed throughout its volume. Determine the magnitude of the electric field 15 cm from the center of the sphere.
A. 22 N/C B. 49 N/C C. 31 N/C D. 87 N/C E. 26 N/C
The organisms with the next highest Encephalization Quotient (EQ) ratios after humans are
A) dolphins B) humans C) whales D) chimps
We are measuring the spectra of two hydrogen gas clouds. The laboratory frame wavelength of one hydrogen line is 656.2 nm. Cloud A's emission line wavelength is 660.1 nm and Cloud B's emission line wavelength is 670.1 nm
What can we conclude about these clouds? A) They are both approaching us, and Cloud A is approaching faster than Cloud B. B) They are both receding from us, and Cloud B is receding faster than Cloud A. C) They are both approaching us, and Cloud B is approaching faster than Cloud A. D) They are both receding from us, and Cloud A is receding faster than Cloud B.