Physics 150 Exam 1 with correct answers |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Explosion - correct answer✔✔When a lot of stored energy is suddenly converted into heat in a |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
confined space
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Energy - correct answer✔✔ability to do work, anything that can be converted into heat
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Heat - correct answer✔✔something that raises the temp. of a material, as measured by a
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
thermometer
1,000 calories - correct answer✔✔How many calories are in 1 Cal?
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1 - correct answer✔✔How many calories are in a Watt hour?
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1,000 Calories - correct answer✔✔How many Calories are in 1 kWh?
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4,000 J - correct answer✔✔How many Joules are in 1 Cal?
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3.6 million J - correct answer✔✔How many Joules are in 1 kWh?
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TNT releases energy quickly - correct answer✔✔Why do you use TNT for explosions instead of
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
choc chip cookies? |||\\\ |||\\\
Choc chip cookies - correct answer✔✔What has more energy per gram: TNT or choc chip
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
cookies?
,15 times - correct answer✔✔How many times more energy does gas have than TNT?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Battery - correct answer✔✔-stores its energy in chemical form |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-uses energy to release electrons from atoms-- electrons carry energy along wires and deliver it
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
to another place
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80% - correct answer✔✔What percent of energy is lost as heat when running a motor with
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
gasoline?
15% - correct answer✔✔What percent of energy is lost as heat when running a motor with
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
battery?
340 times - correct answer✔✔How many times less energy does a car battery have than
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
gasoline?
26 times - correct answer✔✔How many times more energy does hydrogen have than
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
gasoline?
water - correct answer✔✔What waste products does hydrogen create?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
hydrogen and oxygen - correct answer✔✔What is used as fuel in a fuel cell? |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
chemical directly to electrical - correct answer✔✔A hydrogen fuel cell converts ___________
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
energy directly to ____________ energy |||\\\ |||\\\ |||\\\ |||\\\
must be recharged or discarded - correct answer✔✔What happens to a battery once the
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
chemical has been used up? |||\\\ |||\\\ |||\\\ |||\\\
,3x more energy - correct answer✔✔Per gram, how does the energy in liquid hydrogen
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
compare to gasoline? |||\\\ |||\\\
3x less energy - correct answer✔✔per gallon, how does the energy in liquid hydrogen
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
compare to gasoline? |||\\\ |||\\\
not very dense - correct answer✔✔How dense is hydrogen?
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low weight - correct answer✔✔For energy storage for astronauts, is it more important that
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
the fuel takes up less space or has low weight?
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yes - correct answer✔✔Does it take energy to obtain hydrogen?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
means of transporting energy - correct answer✔✔Is hydrogen a source of energy or a means
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
of transporting energy?
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can be more efficient and have better pollution control devices - correct answer✔✔Why
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
would a hydrogen economy be less important than gas? |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
no - correct answer✔✔Does gas explode?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
30 million times - correct answer✔✔How much times more energy does U-235 have than
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
TNT?
forces inside nucleus - correct answer✔✔Where does energy in U-235 come from?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
a million times more - correct answer✔✔For the same weight of fuel, how much more energy
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
do nuclear reactions release compared to chemical or food reactions?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
, hundreds of years - correct answer✔✔How long can the coal that we have last?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
3 times more - correct answer✔✔How much more does gasoline cost than natural gas?
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Kinetic energy - correct answer✔✔energy of motion
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potential energy - correct answer✔✔energy that is stored |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Nuclear energy - correct answer✔✔energy stored between parts of the atomic nucleus
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Gravitational energy - correct answer✔✔energy an object has at high altitude, released when
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
it falls
|||\\\
Power - correct answer✔✔rate of energy release
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
energy/time - correct answer✔✔Power= |||\\\ |||\\\ |||\\\ |||\\\
1 J/sec - correct answer✔✔1 watt
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
1 kW - correct answer✔✔1,000 Joules/second
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
energy is conserved - correct answer✔✔1st law of thermodynamics
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
chemical and potential - correct answer✔✔Most useful forms of energy economically
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Explosion - correct answer✔✔When a lot of stored energy is suddenly converted into heat in a |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
confined space
|||\\\ |||\\\
Energy - correct answer✔✔ability to do work, anything that can be converted into heat
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Heat - correct answer✔✔something that raises the temp. of a material, as measured by a
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
thermometer
1,000 calories - correct answer✔✔How many calories are in 1 Cal?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
1 - correct answer✔✔How many calories are in a Watt hour?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
1,000 Calories - correct answer✔✔How many Calories are in 1 kWh?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
4,000 J - correct answer✔✔How many Joules are in 1 Cal?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
3.6 million J - correct answer✔✔How many Joules are in 1 kWh?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
TNT releases energy quickly - correct answer✔✔Why do you use TNT for explosions instead of
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
choc chip cookies? |||\\\ |||\\\
Choc chip cookies - correct answer✔✔What has more energy per gram: TNT or choc chip
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
cookies?
,15 times - correct answer✔✔How many times more energy does gas have than TNT?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Battery - correct answer✔✔-stores its energy in chemical form |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-uses energy to release electrons from atoms-- electrons carry energy along wires and deliver it
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
to another place
|||\\\ |||\\\ |||\\\
80% - correct answer✔✔What percent of energy is lost as heat when running a motor with
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
gasoline?
15% - correct answer✔✔What percent of energy is lost as heat when running a motor with
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
battery?
340 times - correct answer✔✔How many times less energy does a car battery have than
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
gasoline?
26 times - correct answer✔✔How many times more energy does hydrogen have than
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
gasoline?
water - correct answer✔✔What waste products does hydrogen create?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
hydrogen and oxygen - correct answer✔✔What is used as fuel in a fuel cell? |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
chemical directly to electrical - correct answer✔✔A hydrogen fuel cell converts ___________
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
energy directly to ____________ energy |||\\\ |||\\\ |||\\\ |||\\\
must be recharged or discarded - correct answer✔✔What happens to a battery once the
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
chemical has been used up? |||\\\ |||\\\ |||\\\ |||\\\
,3x more energy - correct answer✔✔Per gram, how does the energy in liquid hydrogen
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
compare to gasoline? |||\\\ |||\\\
3x less energy - correct answer✔✔per gallon, how does the energy in liquid hydrogen
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
compare to gasoline? |||\\\ |||\\\
not very dense - correct answer✔✔How dense is hydrogen?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
low weight - correct answer✔✔For energy storage for astronauts, is it more important that
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
the fuel takes up less space or has low weight?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
yes - correct answer✔✔Does it take energy to obtain hydrogen?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
means of transporting energy - correct answer✔✔Is hydrogen a source of energy or a means
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
of transporting energy?
|||\\\ |||\\\
can be more efficient and have better pollution control devices - correct answer✔✔Why
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
would a hydrogen economy be less important than gas? |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
no - correct answer✔✔Does gas explode?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
30 million times - correct answer✔✔How much times more energy does U-235 have than
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
TNT?
forces inside nucleus - correct answer✔✔Where does energy in U-235 come from?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
a million times more - correct answer✔✔For the same weight of fuel, how much more energy
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
do nuclear reactions release compared to chemical or food reactions?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
, hundreds of years - correct answer✔✔How long can the coal that we have last?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
3 times more - correct answer✔✔How much more does gasoline cost than natural gas?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Kinetic energy - correct answer✔✔energy of motion
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
potential energy - correct answer✔✔energy that is stored |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Nuclear energy - correct answer✔✔energy stored between parts of the atomic nucleus
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Gravitational energy - correct answer✔✔energy an object has at high altitude, released when
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
it falls
|||\\\
Power - correct answer✔✔rate of energy release
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
energy/time - correct answer✔✔Power= |||\\\ |||\\\ |||\\\ |||\\\
1 J/sec - correct answer✔✔1 watt
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
1 kW - correct answer✔✔1,000 Joules/second
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
energy is conserved - correct answer✔✔1st law of thermodynamics
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
chemical and potential - correct answer✔✔Most useful forms of energy economically
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
