Consider a converging lens with a focal point . Without changing the shape and size of the lens, what could you do to move the focus closer to the lens?a. Make the lens from a material with a larger index of refraction. b. There is nothing you can do: the shape alone determines the focal length. c. Make the lens from a material with a smaller index of refraction.
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Physics, 21.06.2019 23:30
Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?
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Physics, 22.06.2019 04:30
In a system, when potential energy decreases, then entropy also decreases. true false
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Physics, 22.06.2019 20:00
Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature
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Consider a converging lens with a focal point . Without changing the shape and size of the lens, wha...
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