Chapter 13 Flashcards
The movement of fluids due to density differences caused by temperature variations
Convection
When one feels a warm oven, the sensation of warmth is the result of
Energy transfer
Temperature is
All of the above
The total amount of energy (both usable and unusable) in any process
Remains constant
Energy transferred as electromagnetic waves
Radiation
The temperature at which all molecular motion stops is
0 degrees K
The energy transferred between objects with different temperatures is
Heat
What is 37.0 degrees Celsius on the Fahrenheit scale?
98.6 degrees F
As the kinetic energy of the molecules in a substance increases, the
Temperature of the substance increases
Energy from the sun reaches earth by
Radiation only
Condensation causes a _________ effect to the surroundings
Heating
Temperature is a measure of the average __________ energy of an objects particles
Kinetic
A material that is a poor conductor of energy
Insulator
A cold- blooded reptile basks on a warm rock in the sun. It’s body is warmed by
Both (a) and (b)
When energy is transformed, the amount of usable energy
Decreases
The Fahrenheit temperature scale is defined by which of the following temperatures?
Water boils at 212 degrees and freezes at 32 degrees
What is -175 degreesC on the Kelvin scale?
98 K
Using the table, determine which substance can absorb the most energy in a temperature increase of 1K
Liquid water
Which substance has a specific heat approximately 10 times greater then the specific heat of silver?
Ethanol
Suppose a fixed number of joules of energy is added as heat to 1KG of the substances listed below. For which substance will rise in temperature be the least?
Water
Which of the following is the name of temperature scale?
All of these
Solar panels gather _______ energy from the sun
Radiated
Which of the following substance is the best conductor of transferring energy as heat?
Iron
A drill bit will get hot after extended use. This is because of
Mechanical heating
Which of these is made from an insulating material?
Styrofoam cup
Which method of energy transfer does not involve movement of matter
Radiation
According to the first law of thermodynamics
The total energy used in any process is conserved
A combustion engine uses what kind of energy to do work?
Heat
A solar heating system the utilizes an electric fan to move warm air throughout a home is called a _______ system
Active
The transfer of energy by the movement of fluids or gases with different temperatures is called
Convection
Heat engines use ________ to convert potential chemical energy and internal kinetic energy into mechanical energy
Combustion
The transfer of energy caused by the collision of molecules is called
Conduction
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
It absorbs energy as heat from the surrounding air.
Convection currents rise in air because
Cool air descends and hot air rises
Which of the following statements is true?
Energy as heat flows from a higher temperature to a lower temperature
10 KG of a substance underwent a 3 K change in temperature when 11500 J of energy as heat was added to the substance. What is the substance?
Copper
Which of the following temperatures is impossible?
-20 K
Heat always moves from an object of _______ temperature to an object of _______ temperature
Higher, lower
__________ describes how much energy is required to raise an object temperature
Specific heat
