Principles of the Living Matter A001809 2024-25
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In an expansion of a gas, the internal energy is decreased by 500 J. If the heat absorbed by the gas during the expansion is 1000 J, what is the work done by the gas?
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Calculate the difference in entropy in the reversible process of melting 1 kg of ice at 0°C (273K). The latent heat of fusion is 3.4⋅x10^5 J/kg.
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A moving body has kinetic energy equal to 100 J. To stop it, a constant force of 5 N and opposite to the direction of the motion is applied. After how many meters does the body stop?
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A body, thrown vertically upwards in the field of gravity (g = 9.8 m/s^2), reaches the point of maximum height and then falls back, returning exactly to the starting point after 8 seconds. The speed with which it returns to the starting point (neglecting the frictional force with the air) is
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As a bacterium swims through water it propels itself with its flagella so as to overcome the frictional drag force and move at constant velocity of 10^(-4) m/s. If the frictional drag force on a bacterium is 10^(-7) N, how much work does the bacterium do in 1 s of constant velocity?
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During a Carnot cycle for an ideal reversible engine that operates between two sources at temperatures 327°C (equivalent to 600K) and 27°C (equivalent to 300K), the amount of heat absorbed by the hottest source is equal to 50 kJ. What is the work produced by the cycle?
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