A molecule of roughly spherical shape has a mass of 1.80 × 10-25 kg and a diameter of 0.6 nm
If the uncertainty in the measured position of the molecule is equal to the molecular diameter, what is the minimum uncertainty in the speed of the molecule? (h = 6.626 × 10-34 J ? s)
A) 100 m/s B) 10 m/s C) 0.1 m/s D) 1 m/s E) 0.01 m/s
D
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GPS stands for
a. the metric system of measurement b. grams per second c. Global Positioning System d. a space shuttle e. none of the above
Radioactivity Basics: Scandium 
Sc decays by emitting a positron. What isotope is the product of this decay?
A. 
Sc
B. 
Sc
C. 
Ca
D. 
Ca
E. 
Ti
Which statement correctly describes units that can be used to measure energy and power?
A) Energy is measured in joules and power is measured in joules per second. B) Energy and power are both measured in units of joules. C) Energy and power are both measured in units of watts. D) Energy is measured in watts and power is measured in watts per second. E) Energy is measured in watts and power is measured in newtons.
Energy and Momentum: If you want to double the momentum of a gas molecule, by what factor must you increase its kinetic energy?
A. 
B. 2
C. 2
D. 4
E. 16