Energy Levels: What is the ionization energy of the neutral hydrogen atom?
A. 27.2 eV
B. 13.6 eV
C. 6.8 eV
D. none of the given answers
Answer: B
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Could acupuncture be responsible for the patients' recovery?
A) No. If there is no plausible mechanism of action, then clearly acupuncture cannot be responsible for their healing. B) Yes. Just because we don't understand the mechanism doesn't mean the process does not occur. C) No. Acupuncture is not accepted by most medical doctors, therefore it isn't effective. D) Yes. If the patients got better, then the acupuncture must be effective.
The major players in the discovery of the cosmic microwave background were at
A) Kitt Peak and the University of Arizona. B) Bell Labs and Princeton. C) Cal Tech and Mt. Palomar. D) Keck telescopes and the University of Hawaii. E) Jet Propulsion Lab and MIT.
The figure shows the graph of 
versus time for an object moving along the x-axis. What is the acceleration at t = 7.0 s?
A. 4.0 
B. 5.0
C. 0.5
D. 0.4
You need to make a sharp turn on a flat road, making a radius of curvature of 15 meters. How does the required force of static friction between your tires compare if you make the turn at 30 mph vs. 60 mph?
A) The force of friction needs to be four times as large. B) The force of friction needs to be twice as large. C) the force of friction is the same for both speeds since the radius of curvature is the same. D) None of the above