It takes 100,000 calories to raise 1 kilogram of water by 100 degree C. How many

Question

It takes 100,000 calories to raise 1 kilogram of water by 100 degree C. How many calories does it take to raise the temperature of an equal volume of lead by 100 degree C? And how many calories to raise an equal weight of lead by 100 degree C? Explain the difference between a calorie and a Calorie. What units are used to describe the heat (or energy)value of food? A ten foot pole is jammed under a 200 pound rock. A small rock is placed one foot away from the end of the pole under the rock. What minimum force must be applied to the opposite end fo the pole to begin to raise the rock? (Hint. Draw a picture.)

Explanation / Answer

te minimum force that must be applkied - 200*1foot = 200 pount-feet

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