About how many 100W light bulbs would you have to light up to use energy at the rate of one horsepower?
a. one or two
b. seven or eight
c. the question doesn't make sense—hp and W are unrelated
d. dozens
e. none of the above
B
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A transverse wave is traveling on a string stretched along the horizontal x-axis. The equation for the vertical displacement y of the string is given by y = 0.0020 cos[?(15x - 52t)], where all quantities are in SI units
The maximum speed of a particle of the string is closest to A) 0.33 m/s. B) 0.43 m/s. C) 0.53 m/s. D) 0.64 m/s. E) 0.74 m/s.
Fiber optic cable is in the form of a cylinder of fiber with index of refraction 1.67 and cladding around the outside of index of refraction 1.45. Light is shown on the end of the fiber at an angle of 
relative to the fiber’s axis. What is the maximum angle with respect to the axis that light can be incident upon the fiber’s end and be fully transmitted along the fiber thanks to total internal reflection at the fiber/cladding interface?
A. 
B. 
C. 
D. 
E. 
F. 
Which planet search technique is currently best suited to finding Earth-like planets?
A) transit B) gravitational lensing C) Doppler D) astrometric E) combining all the above
A wooden ball is tied to the bottom of a swimming pool by a string. What is the tension in the string if the ball’s diameter is 0.15 m and its mass is 144 g? The water in the pool is fresh water, 1000
density.
A. 0.35 N B. 12.7 N C. 14.1 N D. 1.78 N