What is energy?
What is energy?. What is energy?
Question 1 options:
a) energy is force per unit area | |
b) energy is pressure times distance | |
c) energy is force times displacement | |
d) energy is heat delivered per unit time |
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When an automobile stops for a stoplight, its kinetic energy
Question 2 options:
a) is converted to thermal energy. | |
b) completely disappears. | |
c) is transferred to the pavement. | |
d) is stored in the automobile’s battery. |
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An object of mass 10 kg falls from the top of a building 10 m high and lands on the ground below. Â How much work was done by the force of gravity?
Question 3 options:
a) 0 J | |
b) 98 J | |
c) 100 J | |
d) 980 J |
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At our present rate of use, the estimated total remaining recoverable petroleum of the U.S. would supply our needs for  about ________ years.
Question 4 options:
a) 72 | |
b) 48 | |
c) 20 | |
d) 8 |
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The U.S. is using liquid petroleum at a rate of about
Question 5 options:
a) 20 million gallons per day | |
b) 20 million barrels per day | |
c) 20 million barrels per week | |
d) 20 million gallons per week |
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A reasonable estimate for Q_infinity(petroleum) for the world is
Question 6 options:
105 million gallons | |
105 billions gallons | |
105 trillion gallons | |
105 quadrillion gallons |
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The total annual energy consumption in the  U.S. is about _______ QBtu, and this is about ______ tons of coal per year for each person in the U.S.
Question 7 options:
a) 80, 13 | |
b) 800, 130 | |
c) 8000, 1.4 | |
d) 98, 13 |
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The estimated total minable coal in the United States is about
Question 8 options:
a) 275 billion tons | |
b) 500 million tons | |
c) 500 billion tons | |
d) 1.5 trillion tons |
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If you burned 10 pounds of coal to release the heat, how many pounds of wood would your friend have to burn to release the same amount?
Question 9 options:
a) 10 lbs | |
b) 12.75 lbs | |
c) 16.25 lbs | |
d) 8.0 lbs |
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How many Btu’s are there in one kilowatt-hour?
Question 10 options:
a) 4220 | |
b) 3413 | |
c) 2110 | |
d) 1055 |
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A horizontal force of 80 pounds is exerted on a box which moves the box 10 feet across a horizontal floor in 5 seconds. Â What is the power generated by this force?
Question 11 options:
a) 0.66 hp | |
b) 0.51 hp | |
c) 0.34 hp | |
d) 0.29 hp |
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In the U.S. we currently import more than _______ of the oil that we consume.
Question 12 options:
a) 10% | |
b) 50% | |
c) 33% | |
d) 66% |
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What is a reasonable number for the years remaining until the world’s oil supply is completely depleted?
Question 13 options:
a) 10 | |
b) 50 | |
c) 100 | |
d) 200 |
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What is coal, mostly? Â And which type gives off the most heat when burned?
Question 14 options:
a) carbon, bituminous | |
b) carbon, anthracite | |
c) hydrocarbons, lignite | |
d) hydrocarbons, subbituminous |
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Approximately how much coal is produced each year in the U.S.?
Question 15 options:
a) 1 million tons | |
b) 1 billion tons | |
c) 1 trillion tons | |
d) 2 quadrillion tons |
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When a magnet is moved within or near a conducting coil an electrical current is induced in the coil of wire. Â Who discovered this?
Question 16 options:
a) Franklin | |
b) Edison | |
c) Maxwell | |
d) Faraday |
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Your house foundation and ground floor is made up of 1000 cubic feet of concrete. Â About how many Btu are required to raise the temperature of the foundation and floor by 25 degrees F? Given: Â 22 Btu per cubic feed per degreee F for concrete.
Question 17 options:
a) 55,000 Btu | |
b) 220,000 Btu | |
c) 250,000 Btu | |
d) 550,000 Btu |
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What is the typical voltage output of an individual solar cell?
Question 18 options:
a) 0.5 volt | |
b) 5 volt | |
c) 9 volt | |
d) 24 volts |
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Hydroelectric power in the U.S. currently represents about _______% of the total U.S. electricity.
Question 19 options:
40 | |
1 | |
7 | |
less than 1 |
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A windmill system which produces 6 kW of electrical power when the wind is blowing 5 m/s will produce _______ kilowatts when the wind is blowing 10 m/s?
Question 20 options:
a) 72 | |
b) 36 | |
c) 48 | |
d) 12 |
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Which isotope of uranium is particularly good for fission with thermal neutrons?
Question 21 options:
a) uranium-235 | |
b) uranium-233 | |
c) uranium-238 | |
d) uranium-236 |
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What is mean by a “thermal neutron”?
Question 22 options:
a) a neutron with kinetic energy about 5 MeV | |
b) one of the neutrons which is produced in a typical nuclear fission reaction | |
c) a neutron inside any large nuclues | |
d) a neutron with kinetic energy 1/40 of an eV |
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What is the purpose of a breeder reactor?
Question 23 options:
a) reduce the threat of nuclear weapons proliferation | |
b) to extend the useful lifetime of our uranium | |
c) to reduce the thermal polution | |
d) reduce the amount of plutonium produced |
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The mass of your iPod is 100 grams. Â The equivalent mass energy is ________.
Question 24 options:
a) 2.5 billion kWh | |
b) 2.5 trillion kWh | |
c) 0.83 million kWh | |
d) 83 trillion kWh |
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What is a reasonable number for the degree days in a heating season in North-Central Minnesota?
Question 25 options:
a) 3,000 | |
b) 5,000 | |
c) 10,000 | |
d) 20,000 |
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How many Btu per hour are lost through a 100-square foot wall that is made up of a 12-inch thick concrete block  wall with an R value of 1.89 and 4 inches of fiberglass insulation with an R value of 14.8?  The inside temperature is 65 degrees F and the outside temperature is 15 degrees F.
Question 26 options:
a) 116 Btu/hr | |
b) 550 Btu/hr | |
c) 200 Btu/hr | |
d) 300 Btu/hr |
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There are about 107 million homes in the U.S. Â Suppose each home has two people using a hair dryer each day, each for 5 minutes. Â The hair dryer consume at a rate of 1000 watts. Â How much energy does this take each day?
Question 27 options:
32 trillion joules | |
64 trillion joules | |
32 billion joules | |
64 billion joules |
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How much energy is saved by recycling 3 steel cans per week for a year (as compared to throwing the cans in the trash)?
Question 28 options:
72,000 Btu | |
155,000 Btu | |
312,000 Btu | |
440,000 Btu |
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In the U.S., about _______ QBtu of energy is used each year in fuel used for transportation.
Question 29 options:
a) 27 QBtu | |
b) 20 QBtu | |
c) 13 QBtu | |
d) 6 QBtu |
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According to the Transportation Energy Data Book, the expected fuel economy at 55 miles per hour as compared with 75 miles per hour increases by ______ miles per gallon.
Question 30 options:
a) 7 mpg | |
b) 5 mpg | |
c) 2 mpg | |
d) 10 mpg |
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In terms of traffic fatalities per vehicle mile, which mode of transportation is the safest?
Question 31 options:
a) bus | |
b) auto | |
c) airplane | |
d) train |
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During a vehicle crash, a person undergoes serious accelerations. Â What is the maximum magnitude of accleration a person can withstand and still live?
Question 32 options:
a) 10 g | |
b) 30 g | |
c) 120 g | |
d) 60 g |
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Under normal conditions (adiabatic lapse rate is -0.65 degrees C per 100 meters) what is the temperature at the top of an 18,000 foot mountain if the temperature is 72 degrees F at sea level?
Question 33 options:
a) 8 degrees F | |
b) 12 degrees F | |
c) 22 degrees F | |
d) 32 degrees F |
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The springtime pH in Minnesota’s surface water is about 5.0. Â This means the H+ concentration is how many times greater than “neutral”?
Question 34 options:
a) 2 times | |
b) 100 times | |
c) 56 times | |
d) 316 times |
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What does the Dobson unit measure?
Question 35 options:
a) concentration of carbon dioxide | |
b) concentration of ozone | |
c) concentration of H+ ions | |
d) concentration of CFCs |
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The carbon dioxide concentration in the atmosphere was about 280 ppm in 1860 (before we began burning fossil fuels). Â What is it today?
Question 36 options:
a) 340 ppm | |
b) 380 ppm | |
c) 320 ppm | |
d) 290 ppm |
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Why is it that CO_2 and H_2O are culprits in the so-called greenhouse effect?
Question 37 options:
a) ultraviolet radiation can’t make it past | |
b) ultraviolet radiation can move right past | |
c) infrared radiation can’t make it past | |
d) infrared radiation can move right past |
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The acid rain problem in North America is primarily attributable to
Question 38 options:
a) burning gasoline in our cars | |
b) burning natural gas in our homes | |
c) the CO_2 from burning any of the fossil fuels | |
d) the SO_2 from burning coal at power plants |
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Approximately how many traffic-related fatalities are there per year in the U.S.?
Question 39 options:
a) 42,000 | |
b) 32,000 | |
c) 16,000 | |
d) 8,000 |
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What percentage of American workers drive their vehicles to work (alone)?
Question 40 options:
a) 33 | |
b) 46 | |
c) 58 | |
d) 76 |
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