What is the particle X in the reaction 
a. 
b. 
C. e-
D. 
b.
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The luminosity of light emerging from the star's gaseous surface is equal to the
A) rate of energy generated from nuclear reactions in the star's core. B) mass of the star. C) star's apparent brightness. D) star's lifetime. E) temperature of the star's core.
Series/Parallel Circuits: A certain 20-A circuit breaker trips when the current in it equals 20 A. What is the maximum number of 100-W light bulbs you can connect in parallel in an ideal 120-V dc circuit without tripping this circuit breaker?
A. 11 B. 17 C. 23 D. 27
Consider an electron in a hydrogen atom. How does the wavelength ? of an energy eigen function (as measured around the circular band) depend on the energy E associated with that eigen function?
A. ? ? ?E?
B. ? ?
C. ? is independent of E.
D. ? ? 
E. ? ? 1/?E?
Convert a speed of 4.50 km/h to units of ft/min. (1.00 m = 3.28 ft)
A) 0.246 ft/min B) 82.3 ft/min C) 246 ft/min D) 886 ft/min E) 165 ft/min