On a day when the speed of sound in air is 340. m/s, a bat emits a shriek whose echo reaches it later. How far away was the object that reflected back the sound?
What will be an ideal response?
4.25 m
Physics & Space Science
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A volcano with a high, steep slope is a
a. composite volcano. b. stratovolcano. c. shield volcano. d. cinder cone.
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The experiment that dispelled the idea that light travels in the ether is called the
a. Michelson-Morley experiment. b. Hafele and Keating experiment. c. Fitzgerald-Kennedy experiment. d. twin paradox.
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Asteroids orbit the
A) Sun. B) Earth. C) Moon. D) all of these E) none of these
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By adding the cosmological constant, Einstein made the universe steady in that the Universe neither expanded nor contracted
a. True b. False Indicate whether the statement is true or false
Physics & Space Science