Bats can detect small objects such as insects that are of a size approximately that of one wavelength. If bats emit a chirp at a frequency of 60 kHz, and the speed of sound in air is 340 m/s, what is the smallest size insect they can detect?

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5.7 mm

Physics & Space Science

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The frictional force of the floor on a large suitcase is least when the suitcase is

a. pushed by a force parallel to the floor. b. dragged by a force parallel to the floor. c. pulled by a force directed at an angle ? above the floor. d. pushed by a force directed at an angle ? into the floor. e. turned on its side and pushed by a force parallel to the floor.

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A__________is a segment of a chromosome that controls a certain function

A) centriole B) chloroplast C) leucoplast D) gene

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Scientific models should be falsifiable, that is, they should be able to be provenfalse

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Physics & Space Science

Which of the following worlds have the thinnest lithospheres?

A) Earth and the Moon B) Venus and the Moon C) Mercury and Venus D) Earth and Mars E) Earth and Venus

Physics & Space Science