Smart rocks are considered for a geologic dating b ballistic missile defense c nuclear power d solar power ballistic missile defense One watt is equivalent to a one joule second b one coulomb second c one calorie second d one horsepower one joule second it got very hot from the impact Kinetic energy can be measured in a watts b calories c grams d amperes calories The asteroid that killed the dinosaurs exploded because a b c d it was made of explosive material it was made of U 235 it got very hot from the impact it didn t explode it knocked the Earth out of its normal orbit Which of the following statements is true a Energy is measured in joules and power is measured in calories b Power is energy divided by time c Batteries release energy but TNT releases power d Power signifies a very large value of energy Power is energy divided by time For each of these mark whether it is a unit of energy E or power P a horsepower b kilowatt hour c watt d calorie horsepower watt p kilowatt hour calorie E Hybrid vehicles run on a electric and solar power b solar power and gasoline c electric power and gasoline d nuclear power and gasoline electric power and gasoline What is the main reason that hydrogen driven automobiles have not replaced gasoline ones a Hydrogen is too expensive b Hydrogen is too difficult to store in an automobile c Hydrogen is radioactive and the public fears it d Hydrogen mixed with air is explosive Hydrogen is too difficult to store in an automobile Compared to an equal weight of gasoline U 235 can deliver energy that is greater by a factor of a 2200 b 25 000 c one million d one billion one million a TNT b Chocolate chip cookies c Battery d Uranium Uranium Which of the following contains the most energy per gram Compare the energy in a kilogram of gasoline to that in a kilogram of flashlight batteries a The gasoline has about 400 times as much energy b The gasoline has about 10 times as much energy c The gasoline has about 70 times less energy d They cannot be honestly compared since one stores power and the other stores energy The gasoline has about 10 times as much energy The kinetic energy of a typical 1 gram meteor is approximately equal to the energy of Which is least expensive for the same energy delivered a coal b gasoline c natural gas d AAA batteries Coal a 10 grams of TNT b 150 grams of TNT c 1 100 grams of TNT d 10 grams of gasoline 150 grams of TNT three or four decades a hundreds of years b c 72 years d less than a decade hundreds of years Coals reserves in the United States are expected to last for A limitation for all electric automobiles is a Low energy density per battery b Batteries explode more readily than gasoline c Electric energy is not useful for autos d Electric motors are less efficient than gasoline motors Low energy density per battery Solar power is about a 1 watt per square meter b 1 kW per square meter c 1 megawatt per square km d 1 gigwatt per square km 1 kW per square meter 1 gigwatt per square km The efficiency of inexpensive solar cells is closest to A human running up stairs can briefly use power of approximately A 12 oz can of soft drink not the diet or lite kind contains about a 1 b 12 c 65 d 100 12 a 0 01 horsepower b 0 1 horsepower c 0 2 horsepower d 1 horsepower 1 horsepower a 10 Calories b 50 Calories c 150 Calories d 2000 Calories 150 Calories a megawatt b 1 gigwatt c 100 gigawatts d 1000 gigawatts 1 gigawatt A large nuclear power plant delivers energy of about Electricity from a AAA battery costs the consumer about a 1 cent per kilowatt hour b 10 cents per kilowatt hour c 1 per kilowatt hour d 1000 per kilowatt hour 1000 per kilowatt hour Electricity from a wall plug costs the consumer about a 1 cent per kilowatt hour b 10 cents per kilowatt hour c 1 per kilowatt hour d 1000 per kilowatt hour 10 cents per kilowatt hour 10 cents per kiloThe energy per gallon not per pound of liquid hydrogen compared to gasoline is about a 3x less b about the same c 3x more d 12x more 3x less Most of the hydrogen we use in the US comes form a pockets of hydrogen gas found underground b hydrogen gas extracted from the atmosphere c hydrogen produced in nuclear reactors d It is manufactured from fossil fuels and or water It is manufactured from fossil fuels and or water You have 10 tungsten bulbs and each uses 100 watts You leave them all on for an hour The energy used is a 10 kilowatt hours b 1 kilowatt hour c 10 kilowatts d 1000 watts 1 kilowatt hour none of the above The kinetic energy of a bullet per gram is within a factor of 2 a about the same as the energy released from 1 gram of TNT b about the same as the kinetic energy in a typical 1 gram meteor c about the same as the energy released by 1 gram of chocolate chip cookies d none of the above CHAPTER 2 If you double the energy content of a kilogram of gas the temperature of the gas measured on the absolute K scale is unchanged increases by the square root of 2 a b c doubles d is multiplied by 4 doubles About how fast are molecules in air moving the speed of light a 1000 ft sec b c 9 8 m sec d 9 8 cm sec 1000 ft sec Temperature is the measure of a average momentum b average kinetic energy c average velocity d average total energy average kinetic energy a zero since they don t move b whatever speed the wood is moving c approximately 1 7 meters per second d approximately 1000 feet per second e approximately 186 000 miles per second approximately 1000 feet per second A refrigerator operating in a room a warms the room b cools the room c has no effect on the room d removes water vapor from the room warms the room In a bucket of water the instantaneous speed of the molecules is closest to A refrigerator with its door open is operating in a room It a warms the room b cools the room c has no effect on the room d removes water vapor from the room warms the room A table has the same temperature as the air above it That means that the molecules in the air and in the table have a b c d the same average velocity the same average energy the same average acceleration the same average mass the same average energy A gas heater warms a room mostly through Ice melts at a 0 K …
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