After reaching its peak luminosity in hours or days, a nova declines in brightness over a period of a few ________ before returning to its pre-explosion luminosity
Fill in the blank(s) with correct word
months
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What is the magnitude of the acceleration of an electron when in an electric field of 
A. 
B. 
C. 
D. 
E. 
What is the resistance of the combination of resistors?
A. 4.0 
B. 12
C. 13
D. 14
E. 15
Simple Pendulum: A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How does the period of the pendulum change when the elevator moves upward with constant acceleration?
A. The period does not change. B. The period increases. C. The period decreases. D. The period becomes zero. E. The period increases if the upward acceleration is more than g/2 but decreases if the upward acceleration is less than g/2.
A series LR circuit contains an emf source of having no internal resistance, a resistor, a inductor having no appreciable resistance, and a switch
If the emf across the inductor is of its maximum value after the switch is closed, what is the resistance of the resistor? A) 14 ? B) 1.9 ? C) 1.5 ? D) 5.0 ?