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A large horse can perform work at a steady rate of about 1 horsepower, as you might expect.
a. Assuming a 25% efficiency, how many Calories would a horse need to consume to work at 1.0 hp for 1.0 h?
b. Dry hay contains about 10 MJ per kg. How many kilograms of hay would the horse need to eat to perform this work?
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