How many joules per kg
[DOC File]ENERGY LESSON 2
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8. How many joules of kinetic energy does a 1 kg book have when it is tossed across the room at a speed of 2 m/s? How much energy is imparted to the wall it accidentally encounters? Answer: KE = 0.5*m*v2 . KE = (0.5) * (1kg) * (2 m/s)2. KE = 2 Joules. When it hits the wall, 2 Joules of energy are imparted to the wall.
[DOC File]CP7e: Ch. 11 Problems
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How many joules of energy are required to raise the temperature of 100 g of gold from 20.0°C to 100°C? 6. As part of an exercise routine, a 50.0-kg person climbs 10.0 meters up a vertical rope. How many (food) Calories are expended in a single climb up the rope? (1 food Calorie = 103 calories) 7.
[DOC File]Energy Model Worksheet 3:
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a. What is a kilowatt-hour (kilowatt x hour, or kWh)? Determine how many Joules equal one kilowatt-hour. b. A frost free, 17 cu. ft. refrigerator-freezer uses energy at a rate of 500 watts when you hear the compressor running. If the fridge runs for 200 hours per month, how many kilowatt-hours of energy does the refrigerator use each month? c.
[DOC File]Steve Boddeker's Energy and Society Ch 1 Homework
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10 joules. 49 joules. 98 joules. cannot be determined because we do not know the velocity. Per person, the energy consumption in the United States is about 3.3×108 Btu/yr. This is equivalent to a power of. 11.0 W. 11.0 W. 11.0 MW. 11.0 kW. 110 kW. 1.10 kW. 11.0 QW. 0.11 kW
[DOC File]Heat Test - Yola
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Overall energy use in the United States is expected to increase by 2.60 x 1019 Joules by 2020. If this energy were completely provided by corn from farmland, how many more acres would be required? Assume that a kg of corn produces 1.765 x 107 J and that a farmer typically harvests 3400 kg of corn per …
[DOC File]Cal Poly Pomona
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$0.05 / 3.6e6J (7.2e15 Joules) = $100 million. Calculate the energy in joules made available when 1 kg of water falls 30 meters if 90% of the energy can be converted to a useful form. Calculate the energy in joules made available when 1 kg of water is cooled by 2°C if …
[DOC File]Thermochemistry Problems - Worksheet Number One
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9. How many joules of heat are needed to change 50.0 grams of ice at -15.0 °C to steam at 120.0 °C. Make a graph to indicate this change. 10. Calculate the number of joules given off when 32.0 grams of steam cools from 110.0 °C to ice at -40.0 °C. Make a graph to indicate this change. 11.
[DOC File]Work & Energy Problems - Honors
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If the average price per kilowatt hour is $0.19, how many joules of energy is this? How many 690 Calorie Whoppers would we need to burn to produce the equivalent amount of energy? Remember 1 Cal = 1,000 cal and 1 cal = 4.184 joules. 5. A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The 810 kg helicopter ...
Sled Wars - Quia
Trial 1 2 3 Red sled height 50.0 m 25.0 m 5.0 m Red sled mass 20 kg 120 kg 100 kg Red sled speed Red sled momentum Blue sled height 10.0 m 20.0 m 45.0 m Blue sled mass 100 kg 130 kg 40 kg Blue sled speed Blue sled momentum Winning sled In each trial, circle the greater momentum value.
[DOC File]APES Energy Primer - MsHufnagel
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The relation between kilowatt-hours and joules is easy to determine: 1 kWh = 1000 J/s x 3600 s = 3.6 x 106 J Again, we see how small a joule is in practical terms. One kWh is the energy required to power ten 100-watt lightbulbs for one hour. The average home in the U.S. uses about 10,000 kWh of electrical energy per year.
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