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Question1

A 5.0m diameter garden pond holds 1.59x10^3 of water. Solar energy is incident on pond at an average rate of 400 watts per meter squared. If water absorbs all the solar energy and does not exchange energy with its surroundings, how many hours will it take to warm from 15 degrees celsius to 25 degrees celsius?

Question2

A 0.01-kg object is initially sliding at 9.0 m/s. It goes up a ramp (increasing its elevation by 1.5 m), and next moves horizontally before striking a spring of force constant k = 100 N/m. The spring is compacted by 5.0 cm as it completely stops the object.

How much heat energy was created throughout this motion?

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