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Atrain travels 57 kilometers in 3 hours, and then 87 kilometers in 2 hours. what is its average speed? km/hr
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Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.
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Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen
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Which notation is used to represent an alpha particle? a. b. c. d.
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The substances that are necessary for producing of certain hormones and that store and transport vitamins
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Atrain travels 57 kilometers in 3 hours, and then 87 kilometers in 2 hours. what is its average spee...
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