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