Geothermal energy a. depends on the heat of the Earth's core b. is not often used because it is impossible to keep air polluting sulfur compounds from being released. c. can be used to run power plants almost anywhere on earth

- Which of the following best explains why sweating is important to humans in maintaining suitable body temperature? A. Moisture on the skin increases thermal conductivity, thereby allowing heat to flow out of the body more effectively. B. Evaporation of moisture from the skin extracts heat from the body. C. The high specific heat of water on the skin absorbs heat from the body. D. Functioning of the sweat glands absorbs energy that otherwise would go into heating the body E. None of the above explains the principle on which sweating depends.

State the three laws of thermodynamics. a. First Law b. Second Law C. Third Law

50. Rubbing your hands together requires 450 J of energy and results in a thermal energy increase in your palms of 153 J. Calculate how efficiently the kinetic energy is converted to thermal energy.

What is the total required heating energy in raising the temperature of a given amount of water when the energy supplied is 1000 kwh with heat losses of 25% ? A. 1000 B. 1500 C. 1333 O D. 1250

1. A popular web site state that a 200. pound person will burn 450. calories/hour bicycling (moderate effort) and 650. calories/hour rock climbing (ascending). A 150. pound person decides to start a training routine in which she will bicycle for 45 minutes, 3 times a week and rock climb for 1.50 hours every weekend. How many calories will she have burned after 8 weeks of training (assuming she consumes at the same rate)? 2. The density of silver is 10.50 g/cm3. If 5.50 g of pure silver pellets are added to a graduated cylinder containing 11.0 mL of water, to what volume will the water in the cylinder rise?

20. Which of the following best describe radiation? A. Hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks B. When heat transfers from objects that are touching C. When heat is transferred from objects like rays of light or electromagnetically D. When heat transfers through the heater or AC in your house

31. A piece of iron which has a low specific heat and a cup of water both have the same temperature. If they are heated so the internal energy of each doubles a. the water will have the higher temperature. b. the iron will have the higher temperature. c. both will have the same temperature. d. not enough information given to say

5. Which physicist first demonstrated that heat is a form of energy? a. Amedeo Avogadro b. Robert Boyle c. Sir Isaac Newton d. James Prescott Joule e. Lord Kelvin

2. A Site evaluated for a wind farm is observed to have steady winds at a speed of 8.5m/s. Determine the wind energy (a) per unit mass, (b) For a mass of 10 kg and (c) For a flow rate of 1154 kg/s of air.