A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. What is the highest frequency associated with this portion of the spectrum?
A) 1.50 × 1014 Hz
B) 7.50 × 1013 Hz
C) 7.50 × 1014 Hz
D) 7.50 × 1015 Hz
E) 1.50 × 1015 Hz
E
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The Milky Way Galaxy
a. contains about 100 billion stars. b. is about 200 light-years in diameter. c. is the largest known object in the universe. d. all of the above e. a and c
Uniform Electric Fields: A proton moves 0.10 m along the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the proton? (e = 1.60 × 10-19 C)
A. 4.8 × 10-20 J B. 3.2 × 10-20 J C. 1.6 × 10-20 J D. 8.0 × 10-21 J
An object that completes 20 vibrations in 10 seconds has a frequency of
A) 0.5 hertz. B) 1 hertz. C) 2 hertz. D) 200 hertz.
Two identical containers, A and B, hold equal amounts of the same ideal gas at the same Po, Vo and To. The pressure of A then decreases by a half while its volume doubles; the pressure of B doubles while its volume decreases by a half. Which statement correctly describes the temperatures of the gases after the changes?
a. TA = 0.5TB = To. b. TB = 0.5TA = To. c. TB = TA = To. d. TA = 2TB = To. e. TB = 2TA = To.