Chapter 16 physics
Energy transfer by convection is primarily restricted to a liquids B fluids C gases D solids E none of the above
B fluids
In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of Letter a oxygen B hydrogen C nitrogen D all of the same
B hydrogen
Which of these are good insulators? A. Feathers B. Snow C.WOOD D all of the above E none of the above
D none of the above
If you release a single molecule in and evacuated region it will
Fall just as a baseball would
The bridge is more likely to be ice covered in the roadway on a cold day because:
Heat up welling from the ground below is absent on a bridge
There was no greenhouse effect, earths average temperature would likely be
I frigid -18°C
Hydrogen and oxygen molecules in a sample of gas have the same temperature. This means the hydrogen molecules, on average, have the same:
Kinetic energy, but more speed
The heat we enjoy on a sunny day is due mainly to sun's
Large size
If a poor absorber of radiation were a good emitter, it's temperature would be
Less than its surroundings
Metals are good conductors of both heat and electricity due to:
Looseness of outer electrons in a metal Atoms
Which is the most abundant greenhouse gas in earths atmosphere
Water vapor
When an object absorbs as much as it radiates
it remains at about the same temperature.
If a volume of air is warmed, it expands and tends to A cool B warm C neither of these
A. Cool
Temperature of outer space is:
About 2.7 Kelvin
Objects that radiate relatively well:
Absorb radiation relatively well
Glass in the florist greenhouse acts as a one-way valve in that it:
Allows high frequency waves in an blocks low frequency waves existing
Because of trapped air inside, snow is a A good insulator B both a good insulator and a poor conductor C a good conductor E none of the above
B both a good insulator and a poor conductor
If air were a better conductor, at night time earth would be A not appreciably difference in temperature B considerably warmer C considerably colder
C considerably colder
On a cold day your feet feel warmer on a rug then on a tile floor because a rug A for the same mass has more internal energy than tile B is usually warmer than tile C is a poor conductor D all of the above E none of the above
C is a poor conductor
BARE roof on a warmly heated home on a snowy day indicates AP and unwanted flow of heat B fairly good conductivity C poor insulation D all of the above
D all of the above
Newtons law of cooling applies to objects undergoing:
Cooling and warming
A photovoltaic Cell receives energy input by
Radiation
Eight thermos bottle has double glass walls with silver coating on the glass surfaces that face each other. The silver coating reduces energy transfer by:
Radiation
The form of heat transfer that doesn't depend on a medium is:
Radiation
The planet earth loses Heat primarily by
Radiation
The higher the temperature of an object, the:
Shorter the way to Lance it radiates
Suns radiant energy is composed of shorter wavelengths than earth's due to:
Surface temperature
Which body Glows with electromagnetic waves
The sun, the earth, you and your classmates
In practice, a good insulator A Slows heat flow B speeds negative heat flow C stops heat flow D all of the above
a slows heat flow
A region of expanding air tends to A. Warm B. Cool C both of these D neither of these
a warm