Physics Heat & Thermodynamics Level: High School
Radiation
2 Well insulated wall temperature of room A is 20 deg Celcius , and poorly insulated wall temperature of room B is 12 deg Celcius . Body surface temperature is 29 degree Celcius with a surface area of 1.8 meters squared and emissivity of 0.9 . What is the man’s radiant loss in each house ?
Physics Heat & Thermodynamics Level: High School
The coefficient of thermal conductivity has the unit :a) J/(s K)
b) J/(m K )
c) W/ (m K )
d) W/(s K)
Physics Heat & Thermodynamics Level: High School
Thermal Expansion
A steel meter rod reads the correct length of objects at 20 degrees C . If the temperature , of the steel rod , increase to 30 degrees C and the scale is used to measure the length of an object , it will :a) Underestimate the actual length of an object
b) Give the correct length of the object
c) Overestimate the actual length of an object
Physics Heat & Thermodynamics Level: High School
A temperature of -162 degrees C corresponds to :a) -111
b) 162
c)-162
d) 111
Physics Heat & Thermodynamics Level: High School
The specific heat of a gas at constant pressure is 1.70 times the specific heat at constant volume . Find the specific heat at constant pressure . (Universal gas constant R = 8.31 J/(mol K)a) 20.2 J/(mol K)
b) 12.5 J/(mol K)
c) 24.03 J/(mol K)
d) 18.0 J/(mol K)
Physics Heat & Thermodynamics Level: High School
A steel aircraft carrier is 368 m long when moving through the icy North Atlantic at a temperature of 2.5 degrees C . By how much does the carrier lengthen when it is traveling in the warm Mediterranean Sea at a temperature of 18 degrees C ?
Physics Heat & Thermodynamics Level: High School
By what primary heat transfer mechanism does the Sun warm the Earth ?a) Convection
b) Conduction
c) radiation
d) induction
e) combination of all of the above
Physics Heat & Thermodynamics Level: High School
Is it possible to transfer heat from a cold reservoir to a hot reservoir ?a) No
b) Yes, this will happen naturally
c) Theoretically yes, but it has not been accomplished yet .
d) Yes; but work will have to be done .
e) Only if the total Entropy of the universe were to decrease .
Physics Heat & Thermodynamics Level: High School
The second law of thermodynamics leads us to conclude that :a) The total energy of the universe is constant .
b) disorder in the universe is increasing with the passage of time .
c) it is theoretically possible to convert heat into work with 100 percent efficiency .
d) the average temperature of the universe is increasing with the passage of time .
e) the total energy of the universe does not correlate to the critical mass .
Physics Heat & Thermodynamics Level: High School
According to the second law of thermodynamics , for any purpose that may occur within an isolated system , which one of the choices applies ?a) Entropy remains constant .
b) Entropy increases
c) Entropy decrease
d) Both a and b are possible
e) Both a and c are possible
remains constant for reversible process increase for irreversible process
Physics Heat & Thermodynamics Level: High School
When water freezes, the entropy of the water :a) increases
b) decrease
c) does not change
d) could either increase or decrease ; it depends on other factors .
e) None of the above .
Physics Heat & Thermodynamics Level: High School
If the theoretical efficiency of a Carnot engine is to be 100-percent , the heat sink must be :a) absolute zero
b) at 0 degree C
c) at 100 degree C
d) infinitely hot
e) infinitely cold
Physics Heat & Thermodynamics Level: High School
Ten joules of heat energy are transferred toa sample of ideal gas at constant volume . As a result , the internal energy of the gas :a) increase by 10 J
b) increase by less than 10 J
c) increases by more than 10 J
d) decreases by 10 J
e) Remain unchanged
Physics Heat & Thermodynamics Level: High School
Consider two cylinder of gas identical in all respects except than one contains O2 and the other He . Both hold the same volume of gas at STP and are closed by a moving piston at one end . Both gases are now compressed adiabatically to one-third their original volume . Which gas will show the greater temperature increase ?a) The O2
b) This is a no solution problem
c) Neither; both will show the same increase
d) It is impossible to tell from the information given
e) The He
Physics Heat & Thermodynamics Level: High School
A gas is quickly compressed in an isolated environment . During the event , the gas exchanged no heat with its surroundings . This process is :a) isothermal
b) isochoric
c) isobaric
d) adiabatic
e) isotropic.