The voltage supplied to an ac circuit is given by v = 120 sin(377t). What is the voltage at 
A. 0.00 V
B. 2.37 V
C. 63.0 V
D. 109 V
E. 119 V
D. 109 V
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If a reflected ray in air at an angle of reflection of 60 
is totally polarized, what is the index of refraction of the reflecting material?
A. 1.50 B. 2.00 C. 1.73 D. 1.15 E. this angle is not possible for an incident ray in air
Conduction: The thermal conductivity of aluminum is twice that of brass. Two rods (one aluminum and the other brass) of the same length and cross-sectional area are joined together end to end. The free end of the brass rod is maintained at 0°C and the free end of the aluminum rod is maintained at 200°C. If no heat escapes from the sides of the rods, what is the temperature at the place where the two rods are joined together?
A. 76°C B. 133°C C. 148°C D. 155°C
Most of the moons of Saturn have rocky, cratered surfaces, like Deimos and Phobos
Indicate whether the statement is true or false
The process of obtaining energy by merging small nuclei is called
a. fission. b. fusion. c. nucleogenesis. d. bombardment.