Exam Two Physics
Warm air rises because faster moving molecules tend to move to regions of less
density and pressure
The amount of heat transferred to a system can be measured in _______.
either calories or joules
Thermal conduction in solids mainly involves _______.
electron motion
The temperature of water rises when 2.00 calories are added. It will rise the same when
8.38 J are added.
On which temperature scale is 0 degrees the freezing point of water?
Celsius
Newton's law of cooling applies to objects that _______.
Cool or warm up
The temperature at the center of the Sun is about 107 degrees. Does it matter whether this is stated as Celsius degrees or kelvins?
Kelvin rating would be higher
When the temperature of a strip of iron is increased, the length of the strip _______.
also increases
As entropy in a system increases, energy in the system _______.
becomes less ordered
The process of boiling that occurs in water tends to _______.
cool the water
Newton's law of cooling applies to things that are
cooling and warming
When evaporation occurs, the molecules left behind in the water _______.
have decreased average speeds are less energetic result in lowered temperature
When air is compressed, its temperature
increases
Microscopic slush in water tends to make the water
less dense
Foreign ions introduced to water
lower the freezing point of water
Heat comes from the Sun to Earth by the process of _______.
radiation
To say that water has a high specific heat capacity means that water _______.
requires a lot of energy in order to increase in temperature absorbs a lot of energy for a small increase in temperature releases a lot of energy in cooling
When you place a sealed can of air on a hot stove burner, the can undergoes an increase in
temperature. pressure. thermal energy.
Heat is simply another word for _______.
thermal energy that flows from hot to cold
We are warmed on a hot moist day because water molecules in the air striking our bodies
transfer some of their kinetic energies to us.
