Observations indicate that it takes Saturn longer than Jupiter to complete one orbit about the Sun. This is in agreement with which of Kepler's laws?
A. First
B. Second
C. Third
D. Fourth
Answer: C
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The metric system is a decimal system
a. True b. False Indicate whether the statement is true or false
A silicon monoxide (n = 1.45) film of 112-nm thickness is used to coat a glass camera lens (n = 1.56). What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10?9 m)
a. 520 nm b. 768 nm c. 715 nm d. 650 nm e. 455 nm
A satellite moves east, taken as the positive x axis direction, at a speed of 0.5c and a spaceship moves toward it (to the west) at a speed of 0.8c as measured by an observer on the Earth. The speed of the satellite measured by an observer in the spaceship is
a. 8.7c. b. 0.21c. c. ?0.21c. d. 0.93c. e. ?0.93c.
What is the energy of a photon with a frequency of 5.2 × 10^14 Hz?
a. 3.4 × 10^-19 J b. 1.3 × 10^-20 J c. 0.8 × 10^-20 J d. 0.3 × 10^-21 J