Rate of Production of Heat
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1. A certain sedentary person uses energy at an average rate of 123.29Watts. All of this energy has its ultimate origin in the sun. How much matter is converted to energy in the sun per day to supply this person?
2. If 1 kcal = 4.18 kJoule. What is the rate of energy production in kilowatts from a college student producing 156 kcal of heat per hour?
3. A person 72 kg person standing on a surface produces a pressure of 16 MPa onto the surface. What is the area of this surface?
4. Find the pressure due to sea water in kilopascals on a scuba diver when she is 11 meters below the surface of the ocean. Given that the density of sea water is 1.03 X 10 3 kg/m3.
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1) A certain sedentary person uses energy at an average rate of 123.29Watts. All of this energy has its ultimate origin in the sun. How much matter is converted to energy in the sun per day to supply this person?
mc^2 = 123.29*24*60*60 Joules per day ( E = mc^2)
m =(10652256 )/ c^2
= 10652256/ ...
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