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A boy takes 20 minutes to cover 3.2 km on a bicycle find the speed in km/hr
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How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by
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Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves
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Which best describes the weak nuclear force? it maintains attraction between the m ecules in liquids. it attracts the nucleus of one atom to the nucleus of another atom. it pulls all matter in the universe together it keeps particles that make up protons and neutrons together
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The inverse square law applies to: intensity of sound gravitational force intensity of light electric force magnetic force
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A boy takes 20 minutes to cover 3.2 km on a bicycle find the speed in km/hr...
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