Question 1

Which of the following statements about electromagnetic radiation is NOT true?

Accepted Answer

A) Electromagnetic radiation occurs for all objects at all temperatures. 
B) Electromagnetic radiation can travel in vacuum. 
C) Electromagnetic radiation can travel through glass. 
D) A medium is needed for electromagnetic radiation. 
E) Electromagnetic radiation transfers energy. 
A) Electromagnetic radiation occurs for all objects at all temperatures. 
B) Electromagnetic radiation can travel in vacuum. 
C) Electromagnetic radiation can travel through glass. 
D) A medium is needed for electromagnetic radiation. 
E) Electromagnetic radiation transfers energy.

Question 2

The main process by which heat is transferred to your home when it is heated by solar energy is

Accepted Answer

A) conduction. 
B) convection. 
C) radiation. 
D) latent heat transfer. 
E) insulation. 
A) conduction. 
B) convection. 
C) radiation. 
D) latent heat transfer. 
E) insulation.

Question 3

The pressure of a saturated vapor depends on the

Accepted Answer

A) volume of the vapor. 
B) mass of liquid vaporized. 
C) density of the liquid only. 
D) temperature only. 
E) combined volume of liquid and vapor. 
A) volume of the vapor. 
B) mass of liquid vaporized. 
C) density of the liquid only. 
D) temperature only. 
E) combined volume of liquid and vapor.

Question 4

A scuba tank of volume 40 L is filled with 200 moles of compressed air at a pressure of 100 atm.What is the value of an2/V2 due to O2?

Accepted Answer

A) 1.52 atm 
B) 34.6 atm 
C) 21.6 atm 
D) 3.23 atm 
E) 10.4 atm 
A) 1.52 atm 
B) 34.6 atm 
C) 21.6 atm 
D) 3.23 atm 
E) 10.4 atm

Question 5

The coefficient of linear expansion for a certain metal is $\alpha$.The coefficient of area expansion for a square plate made of the same metal is approximately

Accepted Answer

A) $\alpha$ 
B) $\alpha$/2 
C) $\alpha$2 
D)    
E) 2$\alpha$ 
A) $\alpha$ 
B) $\alpha$/2 
C) $\alpha$2 
D)    
E) 2$\alpha$

Question 6

If the absolute temperature of the filament of a lamp were doubled,the energy radiated per second by the filament would

Accepted Answer

A) remain the same. 
B) increase by a factor of 2. 
C) increase by a factor of 4. 
D) increase by a factor of 8. 
E) increase by a factor of 16. 
A) remain the same. 
B) increase by a factor of 2. 
C) increase by a factor of 4. 
D) increase by a factor of 8. 
E) increase by a factor of 16.

Question 7

If the temperature on the warmer side of a wall is doubled,the rate at which heat is conducted through the wall

Accepted Answer

A) doubles. 
B) increases by a factor of 4. 
C) decreases by a factor of 4. 
D) is cut in half. 
E) increases but the rate cannot be determined. 
A) doubles. 
B) increases by a factor of 4. 
C) decreases by a factor of 4. 
D) is cut in half. 
E) increases but the rate cannot be determined.

Question 8

A solid sphere at temperature T radiates energy at a rate of R J/s.If the radius of the sphere were doubled (its temperature remains at T),then the rate of radiating energy would go up by a factor of

Accepted Answer

A) stays the same 
B) 2 
C) 4 
D) 8 
E) 16 
A) stays the same 
B) 2 
C) 4 
D) 8 
E) 16

Question 9

Two types of wall separate a refrigerated room from the rest of a building.Wall 1 has half the thermal conductivity of wall 2.Wall 2 is half as thick as wall 1.The two walls have the same area.The rate of heat flow through wall 2 compared with the rate of heat flow through wall 1 is

Accepted Answer

A) four times greater. 
B) twice as great. 
C) the same. 
D) half as great. 
E) one-quarter as great. 
A) four times greater. 
B) twice as great. 
C) the same. 
D) half as great. 
E) one-quarter as great.

Question 10

If the temperature is 30ºC and the dew point is 10ºC,what is the relative humidity? (use the accompanying table)

Accepted Answer

A) 53% 
B) 71% 
C) 29% 
D) 3.4% 
E) 33% 
A) 53% 
B) 71% 
C) 29% 
D) 3.4% 
E) 33%

Exam 20: Thermal Properties and Processes

Which of the following statements about electromagnetic radiation is NOT true?

The main process by which heat is transferred to your home when it is heated by solar energy is

The pressure of a saturated vapor depends on the

A scuba tank of volume 40 L is filled with 200 moles of compressed air at a pressure of 100 atm.What is the value of an2/V2 due to O2?

The coefficient of linear expansion for a certain metal is α\alphaα .The coefficient of area expansion for a square plate made of the same metal is approximately

If the absolute temperature of the filament of a lamp were doubled,the energy radiated per second by the filament would

If the temperature on the warmer side of a wall is doubled,the rate at which heat is conducted through the wall

A solid sphere at temperature T radiates energy at a rate of R J/s.If the radius of the sphere were doubled (its temperature remains at T),then the rate of radiating energy would go up by a factor of

Two types of wall separate a refrigerated room from the rest of a building.Wall 1 has half the thermal conductivity of wall 2.Wall 2 is half as thick as wall 1.The two walls have the same area.The rate of heat flow through wall 2 compared with the rate of heat flow through wall 1 is

If the temperature is 30ºC and the dew point is 10ºC,what is the relative humidity? (use the accompanying table)

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

The Electric Field I: Discrete Charge Distributions

The Electric Field Ii: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

A scuba tank of volume 40 L is filled with 200 moles of compressed air at a pressure of 100 atm.What is the value of an²/V² due to O₂?

The coefficient of linear expansion for a certain metal is $\alpha$ .The coefficient of area expansion for a square plate made of the same metal is approximately