Total lunar eclipses always occur
a. at the time of new moon.
b. at the time of full moon.
c. during either equinox.
d. during either solstice.
e. at the time that the sun is directly overhead.
B
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At what point is the Moon farthest away from Earth?
a. apogee b. perigee c. umbra d. penumbra e. prominence
Specific Heat: In a flask, 114.0 g of water is heated using 67.0 W of power, with perfect efficiency. How long will it take to raise the temperature of the water from 15°C to 25°C? The specific heat of water is 4186 J/kg ? K.
A. 71 s B. 4.1 s C. 17 s D. 320,000 s
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If 
= [10 m, 30°] and 
= [25 m, 130°], what is the magnitude of the sum of these two vectors?
A. 20 m
B. 35 m
C. 15 m
D. 25 m
E. 50 m
An LR circuit includes a resistor of resistance R, an inductor of inductance L and a battery of emf E = 10 V. At time t = 0 the current in the circuit is I = 0. At time t = 6.1 ms the current is I = 0.66 A. What are the values of L and R?
A) not enough information given B) L = 15 mH, R = 20 ? C) L = 10 mH, R = 100 ? D) L = 50 mH, R = 150 ? E) L = 2 mH, R = 10 ?