Optical fibers work because of
a. interference.
b. diffraction.
c. total internal reflection.
d. diffuse reflection.
e. polarization.
c
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A 5-gallon container of water (approximately 20 kg) having a temperature of 212°F is added to a 50-gallon tub (approximately 200 kg) of water having a temperature of 50°F. What is the final equilibrium temperature (in °C) of the mixture?
a. 54 b. 36 c. 18 d. 66 e. 14
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A bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10 cm
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A. 4.3 × 10?22 B. 3.2 × 10?22 C. 5.4 × 10?22 D. 6.5 × 10?22 E. 2.5 × 10?22