Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 540 Hz. What is the frequency heard by the driver of the lead car? (vsound = 340 m/s)
a. 463 Hz
c. 579 Hz
b. 540 Hz
d. 500 Hz
B
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Why can't a worldline on a spacetime diagram be horizontal?
A) A horizontal worldline corresponds to something moving infinitely fast. B) A horizontal worldline represents traveling backward in time. C) A horizontal worldline represents moving at exactly the speed of light. D) A horizontal worldline is possible. It corresponds to a constant, finite speed. E) A horizontal worldline is possible. It corresponds to a stationary object.
The only Jovian moon to orbit its planet retrograde and out of the equatorial plane is ________
Fill in the blank(s) with correct word
Which of the following frequencies could NOT be present as a standing wave in a 2m long organ pipe open at both ends? The fundamental frequency is 85 Hz
a. 85 Hz. b. 170 Hz. c. 255 Hz. d. 340 Hz. e. 382 Hz.
Firewalking is similar to
A. water on a saucepan B. the space shuttle reentry C. an automobile air bag D. water skiing