Ball rolling along a floor
A ball rolling along a floor doesn't continue rolling indefinitely. Is it because it is seeking a place of rest or because some force is acting upon it? If the latter, identify the force.
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An inventor claims to have developed a food freezer that at a steady state requires a power input of .5 kW to extract energy by heat transfer at a rate of 3000 J/s from freezer contents at 270 K.
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A random sample of 25 items had a mean wholesale price of 165.2 and a standard deviation of s = 29.5. What is s of the retail price of those items? Give answers to 2 decimal places.
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A 2016 survey of undergraduate students considered this further and found that compared with students that did not use cannabis at least once
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