Physical Science (PSY151) Chapter 5: Les Thomas
Which of the following formulas relating temperatures on the Celsius and Fahrenheit scales is correct?
Tc = (5/9)(TF - 32°)
The pressure at the bottom of a barrel filled with liquid does not depend on the
area of the liquid surface
A barometer measures
atmospheric pressure
In order to operate, a heat engine must have
both a hot and a cold reservoir.
In an isolated system, entropy
cannot decrease
Which of the following quantities is independent of the size and shape of an object composed of a given material?
density
Suppose there were molecules that had no attraction whatsoever for one another. A collection of such molecules would form a
gas
Molecules are, in general, farthest apart from one another in
gases
Ice floats in water because
its density is less than that of water.
When heat is added to a body of matter, the resulting temperature increase does not depend upon
its shape
Heat conduction is most efficient in
metals
Buoyancy occurs because, as the depth in a fluid increases, the fluid's
pressure increases.
Heat can be transferred through a vacuum by which one or more of the following?
radiation
A refrigerator
removes heat from a region and carries it elsewhere
When a gas is forced into a smaller volume without a change in temperature, its pressure increases because its molecules
strike the container walls more often
Of the following, a molecule is best described as
the smallest particle of a substance that is representative of the substance.
Sublimation refers to
the vaporization of a solid without first becoming a liquid.
Oxygen boils at -183°C. This temperature is
-297°F.
The melting point of water is 0°C. Its freezing point is
0°C
A 2-kg brick has the dimensions 7.5 cm × 15 cm × 30 cm. The pressure the brick exerts when standing on its smallest face is
178Pa
The density of brass is 8 × 103 kg/m3. The volume occupied by 320 g of brass is
38 cm3
A temperature of 120°F is almost exactly
49°C
If a heat engine that exhausts heat at 400 K is to have an efficiency of 33%, it must take in heat at a minimum of
600 K
Heat can be transferred through a liquid by which one or more of the following?
Both A, B, and C