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A typical human diet is " 2000 calories " per day , where the " calorie ” describing food energy is actually 1 kilocalorie . Express 2000 kcal / day in watts .

A typical human diet is " 2000 calories " per day , where the " calorie ” describing food energy is actually 1 kilocalorie . Express 2000 kcal / day in watts .

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A typical human diet is " 2000 calories " per day , where the " calorie ” describing food energy is actually 1 kilocalorie . Express 2000 kcal / day in watts .
skateboarder between the top and bottom of the hill. 29. After a tornado, a 5.0-g graphite pencil was found embedded 5.8 cm in a tree. Subsequent measurements showed that the tree exerted a stopping force of 76 N on the pencil. What was the pencil's speed? 30. From what height would you have to drop a car for its impact to o NO be equivalent to a 20-mi/h collision? Section 6.5 Power 48. E 31. A typical human diet is "2000 calories" per day, where the "calorie" describing food energy is actually 1 kilocalorie. Express 2000 kcal/day in watts. 32. A horse plows a 250-m-long furrow in 6.0 min, exerting a 700-N force. Find its power output, measured in watts and in horsepower. 33. Atypical car battery stores about 2 kW• hof energy. What's its output if it drains completely in (a) 1 minute, (b) 1 hour, and (c) 1 day? 34. A sprinter completes a 100-m dash in 10.6 s, doing 22.4 kJ of work. What's her average power output? 35. How much work can a 3.8-hp lawnmower engine do in 30 min? 36. A 75-kg long-jumper takes 3.1 s to reach a prejump speed of 10 m/s. What's his power output? 37. Estimate your power output as you do deep knee bends at the rate to fo power Probl 49. Y p. sl th tic of 50. Tu of one per second. 38. In midday sunshine, solar energy strikes Earth at the rate of about ENV 1 kW/m². How long would it take a perfectly efficient solar col- са ap
Transcribed Image Text:skateboarder between the top and bottom of the hill. 29. After a tornado, a 5.0-g graphite pencil was found embedded 5.8 cm in a tree. Subsequent measurements showed that the tree exerted a stopping force of 76 N on the pencil. What was the pencil's speed? 30. From what height would you have to drop a car for its impact to o NO be equivalent to a 20-mi/h collision? Section 6.5 Power 48. E 31. A typical human diet is "2000 calories" per day, where the "calorie" describing food energy is actually 1 kilocalorie. Express 2000 kcal/day in watts. 32. A horse plows a 250-m-long furrow in 6.0 min, exerting a 700-N force. Find its power output, measured in watts and in horsepower. 33. Atypical car battery stores about 2 kW• hof energy. What's its output if it drains completely in (a) 1 minute, (b) 1 hour, and (c) 1 day? 34. A sprinter completes a 100-m dash in 10.6 s, doing 22.4 kJ of work. What's her average power output? 35. How much work can a 3.8-hp lawnmower engine do in 30 min? 36. A 75-kg long-jumper takes 3.1 s to reach a prejump speed of 10 m/s. What's his power output? 37. Estimate your power output as you do deep knee bends at the rate to fo power Probl 49. Y p. sl th tic of 50. Tu of one per second. 38. In midday sunshine, solar energy strikes Earth at the rate of about ENV 1 kW/m². How long would it take a perfectly efficient solar col- са ap
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