Chapter 14 Flashcards
What increases as the KE of an object increases?
The temperature of an object
-a measure of how hot or cold something is; specifically, a measure of the average KE of the particles in an object
Temperature
What do common thermometers rely on?
Expansion
-an instrument that measures and indicates temperature
Thermometer
Are all thermometers the same?
No, they are all beautiful and special because they were created by God.
Ex. Refrigerator
What are two common scales used for measuring temperature?
Fahrenheit and Celsius
A degree Celsius is ___ times larger than a degree Fahrenheit.
1.8
Fahrenheit=
[(1.8)(Celsius)] + 32
Celsius=
(Fahrenheit - 32)/1.8
What is the Kelvin scale based on?
Absolute Zero
-the temperature at which molecular energy is at a minimum (zero)
Absolute Zero
Kelvin=
Celsius + 273
Does the Kelvin scale have negative numbers?
Nah
What are the boiling and freezing points of Celsius?
100°
0°
What are the boiling and freezing points of Fahrenheit?
212°
32°
What are the boiling and freezing points of Kelvin?
373°
273°
-the energy transferred between objects that are at different temperatures
Heat
The transfer of energy is always from the ____ temperature substance to the _____ temperature substance.
Higher
Lower
Three methods of heat energy transfer:
Conduction
Convection
Radiation
______ is the transfer of energy as heat moves through a material.
Thermal conduction
-involves objects in direct contact with one another
Conduction
-results from the movement of warm fluids
Convection
-the movement of matter due to differences in density caused by temperature variations
Convection
-the vertical movement of fluid currents due to temperature variations
Convection Currents
Give an example of a convection current.
Warm air rising and cool air sinking
Does radiation require contact with objects.
You bet your not.
-the energy that is transferred as electromagnetic waves
Radiation
-reduces energy flow
Insulator
-a material through which heat energy can be easily transferred
Conductor
-the quantity of heat required to raise a unit of mass of homogeneous material of 1°C or 1 K in specified way given constant pressure and volume
Specific Heat
SI unit for specific heat
J/kg*K
-means that this is the amount of energy in Joules needed to raise the temperature of 1 kg of the substance by exactly 1K
Specific heat energy transfer
Specific heat formula
E=cm(delta)t or
Energy= Specific Heat * Mass * Temperature change
Three methods of heat energy transfer:
Conduction
Convection
Radiation
______ is the transfer of energy as heat moves through a material.
Thermal conduction
-involves objects in direct contact with one another
Conduction
-results from the movement of warm fluids
Convection
-the movement of matter due to differences in density caused by temperature variations
Convection