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Q. A 120-g mug at 21C is filled with 210g of coffee at 91C. Assuming all of the heat lost by the coffee is transferred to the mug, what is the final temperature of the coffee? The specific heat capacity of the mug is 7.8 X 10^2 J/(Kg C)

Q. A mass-spring system oscillates with an amplitude of 3.40 cm. If the spring constant is 228 N/m and the mass is 414 g, determine the mechanical energy of the system.

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