Studied by 0 peopleThermal energy depends on an object's
D. All of the above
How do you know that a sealed calorimeter is a closed system?
C. Thermal energy is not transferred to the environment.
Which of the following materials conducts heat well?
C. Metal.
Temperature is
D. All of the Above.
Which method of energy transfer does not involve movement of matter?
C. Radiation
Suppose a fixed number of joules of energy is added as heat to 1 kg of the substances listed below. For which substance will rise in temperature be the least.
C. Water.
10 kg of a substance underwent a 3 K change in a temperature when 11,500 J of energy as heat was added to the substance. What is the substance?
C. Copper.
A combustion engine uses what kind of energy to do work?
B. Heat.
Which of the following is a unit of temperature?
A. Celsius degree
Heat is the transfer of thermal energy from one object to another because of a difference in.
C. Temperature.
What property of an object is related to the average kinetic energy of the particles in that object?
D. Temperature
As the temperature of an object rises, so does the
C. Thermal energy of the object.
Which of the following devices is based on the property of thermal expansion?
D. Thermometer.
What does a calorimeter directly measure?
A. Change in temperature (OR C. SPECIFIC HEAT)
Energy from the sun reaches Earth mostly by.
C. Radiation.
Matter is needed to transfer thermal energy by.
D. Both A and B
The vacuum inside the thermos bottle shown in Figure 16-1 stops which type of thermal energy transfer to keep the liquid hot?
D. Both A and B.
To which of the following does the first law of thermodynamics apply?
D. All of the above.
The second law of thermodynamics states that thermal energy can flow from colder objects to hotter objects.
B. Only if work is done on the system.
In most four-stroke internal combustion engines, when does the piston move downward?
D. During the power and intake strokes.
Which central heating system involves a furnace and a blower?
B. Forced-air.
In forced-air heating systems, where are warm-air vents usually located?
B. Near the floor.
A fluid that vaporizes and condenses inside the tubing of a heat pump is called the.
C. Refrigerant.
Which of the following happens in a heat pump?
A. The compressor increases the pressure and temperature of the refrigerant.
Which type of central heating system is often used when heating many buildings from a central location?
D. Steam (OR B. Forced-air).
Describe the spontaneous flow of heat between objects at different temperatures.
Heat flows spontaneously from hot to cold objects.
What role do free electrons have in conduction in metals?
Free electrons collide with each other and with atoms and ions to transfer thermal energy.
Which type of central heating system involves fans and ducts to circulate warm air?
Forced-air heating.
Explain what happens to the surrounding air when a refrigerant condenses and why this happens.
The surrounding air is warmed. The refrigerant cools and loses thermal energy as it turns from a gas to a liquid.
How has keeping foods refrigerated helped society?
Refrigeration helps society via keeping food from spoiling quickly. The lessen chance for spoilage brings forth a less chance of disease from eating spoiled food.
MR BRYANT'S CLASS
PHYSICAL SCIENCE.
What is -175 degrees C on the Kelvin scale?
C. 98 K.
As the kinetic energy of the molecules in a substance increases, the
A. The temperature of the substance increases.
The transfer of energy caused by the collision of molecules is called.
B. Conduction
The transfer of energy by the movement of fluids or gases with different temperatures is called.
A. Convection.
Energy from the sun reaches Earth by
B. Radiation Only.
Convection currents rise in air because
B. Cool air descends and hot air rises
Which of the following substances is the best conductor of transferring energy as heat?
C. Iron
How much heat energy will cause the temperature of 7 kg of iron to increase its temperature by 15 K? The specific heat of iron is 449 J/kg*K
A. 6.8 * 10^4 J
According to the first law of thermodynamics
C. The total energy used in any process is conserved.
Which of the following statements is true?
B. Energy as heat flows from a higher temperature to a lower temperature.
In an air conditioner, a substance that easily evaporates and condenses is used to transfer energy from a room to the air outside. When the substance evaporates,
A. It absorbs energy as heat from the surrounding air.
The Fahrenheit temperature scale is defined by which of the following temperatures?
B. Water boils at 212 degrees and freezes at 32 degrees.
A cold-blooded reptile basks on a warm rock in the sun. Its body is warmed by.
D. Both A and B.
The temperature of a substance increases by 3k when 1635 J is added to 2 kg quantity of the substance. What is the specific heat of the substance?
B. 272 J/kg*K
Using the table, determine which substance can absorb the most energy in a temperature increase of 1 K.
A. Liquid Water.
Which substance has a specific heat approximately 10 times greater than the specific heat of silver.
B. Ethanol.
The temperature of 1.5 kg of ethanol is 37 C. What will the final temperature be if 80,000 J of energy as heat is added to the ethanol?
C. 59 C
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