Smart Rocks are considered for A geologic dating B ballistic missile defense C nuclear power D solar power One watt is equivalent to A one joule second B one coulomb second C one calorie second D one horsepower The asteroid that killed the dinosaurs exploded because A it was made of explosive material B it was made out of U 235 C it got very hot from the impact D It didn t explode it knocked the Earth out of its normal orbit Kinetic energy can be measured in A watts B calories C grams D amperes Which of the following 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 E All of the above Hybrid vehicles run on A electric and solar power B solar power and gasoline C electric power and gasoline D nuclear 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 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 Which of the following contains the most energy per gram A TNT B chocolate chip cookies C battery D uranium 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 Which is least expensive for the same energy delivered A coal B gasoline C natural gas D AAA batteries The kinetic energy of a typical 1 gram meteor is approximately equal to the energy of A 10 grams of TNT B 150 grams of TNT C 1 100 grams of TNT D 10 grams of gasoline Coal reserves in the United States are expected to last for A hundreds of years B three or four decades C 72 years D less than a decade A limitation of 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 Solar power is about choose all that are correct A 1 watt per square meter B 1 kW per square meter C 1 megawatt per square km D 1 gigawatt per square km The efficiency of inexpensive solar cells is closest to A 1 B 12 c 65 D 100 A human running up stairs can briefly use power of approximately A 0 01 horsepower B 0 1 horsepower C 0 2 horsepower D 1 horsepower A 12 oz can of soft drink contains about A 10 Calories B 50 Calories C 150 Calories D 2000 Calories A large nuclear power plant delivers energy of about A 1 megawatt B 1 gigawatt C 100 gigawatts D 1000 gigawatts Electricity from a AAA battery costs the consumer about A 1 per kilowatt hour B 10 per kilowatt hour C 1 per kilowatt hour D 1000 per kilowatt hour Electricity from a wall plug costs the consumer about A 1 per kilowatt hour B 10 per kilowatt hour C 1 per kilowatt hour D 1000 per kilowatt hour The energy per gallon of liquid hydrogen compared to gasoline is about A 3x less B about the same C 3x more D 12x more Most of the hydrogen we use in the United States comes from 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 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 The kinetic energy of a bullet per gram is 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 If you double the energy content of a kilogram of gas the temperature of the gas A is unchanged B increases by the square root of 2 C doubles D is multiplied by 4 About how fast are molecules in air moving A 1 000 ft sec B the speed of light C 9 8 m sec D 9 8 cm sec Temperature is the measure of A average momentum B average kinetic energy C average velocity D average total energy In a bucket of water the instantaneous speed of the molecules is closest to 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 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 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 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 the same average velocity B the same average energy C the same average acceleration D the same average mass Ice melts at A 0 K B 0 C C 0 F D 100 C A gas heater warms a room mostly through A convection B conduction C radiation D depletion The velocity of sound A increases when the temperature increases B decreases when the temperature increases C depends on the pressure of the air D is constant independent of the temperature If a gasoline engine produces a hotter explosion then the efficiency of the engine should A be the same B go up C go down A cup full of water and made of plastic feels warmer than one made of glass because A plastic is warmed by water B plastic conducts heat less than glass C plastic conducts heat better than glass D plastic dissolves in water The atom with the fewest number of protons is A helium B carbon C hydrogen D oxygen How many atoms are there in the width of a human hair About A 25 B 125 000 c 273 000 000 000 D 6x10 23 The speed of sound is approximately A 1 foot per nanosecond B 1 foot …
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