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Physics 120 Thermodynamics exam with verified detailed answers
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When a bimetallic strip is heated, the strip will bend toward the side - ✔✔with smaller
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coefficient of linear expansion || || ||
Internal human body temperature is ~98.6*F, what is it in Celsius? - ✔✔37*C
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C=5/9(*F-32)
5/9(98.6-32) = 37*C || ||
Convert 14*C to K - ✔✔287K || || || || ||
|| 273 + 14 = 287K
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The coefficient of linear expansion of steel is 12x10^-6. What is the change in length of a
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25m steel bridge span when it undergoes a temp change of 40K? - ✔✔1.2cm
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l=a*l*change in t || ||
l= 12x10^6*25*40
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l=1.2cm
When the pressure and the absolute temperate of an ideal gas are increased each by a factor
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of two, the volume of the gas will... - ✔✔not change
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, 2
If the pressure acting on an ideal gas at a constant temperature is tripled, its volume is... -
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✔✔reduced to one third || || ||
The number of molecules in one mole of a substance.... - ✔✔is the same for all substances
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An ideal gas is at a pressure 1x10^5 N/m2 and a volume 2m3. If the gas is compressed to a
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volume 1m3 while the temperature remains constant, what will be the new pressure in the
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gas? - ✔✔2x10^5 || ||
V1/V2=(T1*P2)/(T2*P1)
2/1=P2/1X10^5
P2=2X10^5
A weather balloon contains 12m3 of hydrogen gas when it is released from a location with
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temp of 22*C and pressure of 101 kPa. It rises to a temp of -30*C and pressure 20 kPa. I the
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balloon is free to expand so that the pressure of the gas is equal to ambient pressure, what is
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the new volume of the balloon? - ✔✔49.9m3
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V1/V2=(T1*P2)/(T2*P1)
|| 12/V2=295(20)/243(101)
|| V2=49.9M3
A constant volume closed container of gas is at a pressure 1x10^5 N/m2 and a temp of 20*C.
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What is the pressure if the temp of the gas is increased to 60*C? - ✔✔1.14x10^5 N/m2
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Physics 120 Thermodynamics exam with verified detailed answers
|| || || || || || ||
When a bimetallic strip is heated, the strip will bend toward the side - ✔✔with smaller
|| || || || || || || || || || || || || || || ||
coefficient of linear expansion || || ||
Internal human body temperature is ~98.6*F, what is it in Celsius? - ✔✔37*C
|| || || || || || || || || || || ||
C=5/9(*F-32)
5/9(98.6-32) = 37*C || ||
Convert 14*C to K - ✔✔287K || || || || ||
|| 273 + 14 = 287K
|| || || ||
The coefficient of linear expansion of steel is 12x10^-6. What is the change in length of a
|| || || || || || || || || || || || || || || || ||
25m steel bridge span when it undergoes a temp change of 40K? - ✔✔1.2cm
|| || || || || || || || || || || || ||
l=a*l*change in t || ||
l= 12x10^6*25*40
||
l=1.2cm
When the pressure and the absolute temperate of an ideal gas are increased each by a factor
|| || || || || || || || || || || || || || || || ||
of two, the volume of the gas will... - ✔✔not change
|| || || || || || || || || ||
, 2
If the pressure acting on an ideal gas at a constant temperature is tripled, its volume is... -
|| || || || || || || || || || || || || || || || || ||
✔✔reduced to one third || || ||
The number of molecules in one mole of a substance.... - ✔✔is the same for all substances
|| || || || || || || || || || || || || || || ||
An ideal gas is at a pressure 1x10^5 N/m2 and a volume 2m3. If the gas is compressed to a
|| || || || || || || || || || || || || || || || || || || ||
volume 1m3 while the temperature remains constant, what will be the new pressure in the
|| || || || || || || || || || || || || || ||
gas? - ✔✔2x10^5 || ||
V1/V2=(T1*P2)/(T2*P1)
2/1=P2/1X10^5
P2=2X10^5
A weather balloon contains 12m3 of hydrogen gas when it is released from a location with
|| || || || || || || || || || || || || || || ||
temp of 22*C and pressure of 101 kPa. It rises to a temp of -30*C and pressure 20 kPa. I the
|| || || || || || || || || || || || || || || || || || || || ||
balloon is free to expand so that the pressure of the gas is equal to ambient pressure, what is
|| || || || || || || || || || || || || || || || || ||
the new volume of the balloon? - ✔✔49.9m3
|| || || || || || || ||
V1/V2=(T1*P2)/(T2*P1)
|| 12/V2=295(20)/243(101)
|| V2=49.9M3
A constant volume closed container of gas is at a pressure 1x10^5 N/m2 and a temp of 20*C.
|| || || || || || || || || || || || || || || || ||
What is the pressure if the temp of the gas is increased to 60*C? - ✔✔1.14x10^5 N/m2
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