For a system undergoing an adiabatic process,
a. 
b. 
c. 
d. 
e. 
d.
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The Coulomb constant, k, has a value of 
The permittivity of free space,
has the units
A. 
B. N·m/C.
C. 
D. 
E. that are not given.
A 120-V rms signal at 60 Hz is applied across a 30-mH inductor and a 100-? resistor. What is the rms value of the current in this circuit?
A) 0.80 A B) 1.2 A C) 1.4 A D) 1.6 A E) 1.8 A
Which of the following statements about planetary nebulas is correct?
A. They expand at a typical rate of 20 kilometers per second. B. They contain flakes of carbon and silicon material. C. Their shape can be very irregular. D. They are shells of glowing gas and dust ejected by dying Sun-like stars. E. All of these choices are correct.
A marble has a diameter of 2 cm. At what distance would the marble have an angular diameter of 1 arc second?
a. 4.1 cm b. 4.1 miles c. 4.1 m d. 4.1 ft e. 4.1 km