A heating element inside a rigid plastic box in the form of a cube, 0.15 m on a side, is used to heat its contents, a volume of nitrogen gas (N2), which begins at standard temperature (0oC) and pressure (1 atm). If the heat input to the box is 185 J, what is the final temperature of the gas?
a. 
b. 
c. 
d. 
e. 
e.
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A capacitor in a single-loop RC circuit is charged to 85% of its final potential difference in 2.4 s. What is the time constant for this circuit?
a. 1.5 s b. 1.3 s c. 1.7 s d. 1.9 s e. 2.9 s
Of the wavelengths emitted from a hydrogen gas discharge tube, those that are associated with transitions from higher levels down to the n = 1 level produce which of the following?
a. infrared c. ultraviolet b. visible d. mixture of infrared and visible
Significant Figures: A train travels at a constant speed of 60.4 mi/h for 101.5 min. What distance does the train cover expressed to the correct number of significant figures?
A. 100 mi B. 102 mi C. 102.2 mi D. 102.18 mi E. 102.181 mi
Potential Energy: An alpha particle (a helium nucleus, having charge +2e and mass 6.64 × 10-27 kg) moves head-on at a fixed gold nucleus (having charge +79e). If the distance of closest approach is 2.0 × 10-10 m, what was the speed of the alpha particle when it was very far away from the gold? (k = 1/4??0 = 9.0 × 109 N ? m2/C2, e = 1.60 × 10-19 C)
A. 2.3 × 105 m/s B. 4.6 × 105 m/s C. 2.3 × 106 m/s D. 4.6 × 106 m/s