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Q. For a damped oscillator with a mass of 290 g, a spring constant 80 N/m and a damping coefficient of 57 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 26 cycles?

Q. A 25 g ice cube floats in 200 g of water in a 100 g copper cup; all are at a temperature of 0°C. A piece of lead at 97°C is dropped into the cup, and the final equilibrium temperature is 12°C. What is the mass of the lead?

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