A train station bell gives off a fundamental tone of 1000 Hz as the train approaches the station at a speed of 20.0 m/s. If the speed of sound in air is 335 m/s, what will be the apparent frequency of the bell to an observer riding the train?
a. 1060 Hz
c. 943 Hz
b. 1070 Hz
d. 940 Hz
A
Physics & Space Science
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Adams and Leverrier both predicted the position of Neptune, based on its effects on:
A) the Sun. B) Jupiter. C) Saturn. D) Uranus. E) Pluto.
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Full Moon always occurs
a. on the 15th of ever month. b. when the Moon is at right angles to the direction of the Sun. c. when the Moon is closer to Sun than the Earth is. d. when the Moon is directly opposite the position of the Sun.
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The space time diagram in figure R2.12 shows the world lines of various objects. Which world line cannot possibly be correct? (Explain why.)
A. A
B. B
C. C
D. D
E. E
Physics & Space Science
When discharging a battery, the terminal voltage is ________ the battery emf
A) more than B) less than C) equal to D) zero, as is
Physics & Space Science