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Principles of the Living Matter A001809 2024-25
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A lever of negligible weight is hinged at a point one-fifth of its length from one end. If a body of mass 10 kg is suspended from the end of the shorter arm, what mass must be suspended from the end of the longer arm to keep the lever horizontal?
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A 5-kg object moving at 4 m/s collides with a 10-kg object at rest, which then starts moving with a velocity of 2 m/s. What is the velocity of the 5-kg object after the collision?
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A piece of metal, mass 8 kg, requires 180 kJ to heat up by 50 K. The metal is
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At rest, our bodies generate heat at a rate of about 100 W (equivalent to 100 J in 1 s). Calculate the minimum amount of entropy we generate in our surroundings in a day, neglecting the small entropy increase from eating and assuming a constant temperature of 20°C (equivalent to 293 K).
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Why are oils usually liquid at room temperature whereas fats are solid?
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Find the FALSE statement.
The α and β forms of glucose are:
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