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Aheat engine has a hot reservoir of 490°c and a cold reservoir of 210°c. what is the efficiency of the engine?
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Orange juice has a lower or higher viscosity than chocolate syrup
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Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.
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Physics, 22.06.2019 10:00
Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?
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Physics, 22.06.2019 11:00
If a simple machine reduces the strength of a force, what must be increased?
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Aheat engine has a hot reservoir of 490°c and a cold reservoir of 210°c. what is the efficiency of t...
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