Physics Chapter 15
The temperature of absolute zero is stated as _______.
-273 degrees C
The amount of heat needed to raise the temperature of 1 gram of water by 1°C is _______.
1 calorie
Which of these cites the lowest temperature?
270 K
What are the temperatures for freezing water and boiling water on the Kelvin temperature scale?
273K for freezing water; 373K for boiling water
Before ice can form on a lake, all the water in the lake must be cooled to
4 degrees C.
Water is most dense at _______.
4°C
Which is the largest unit of heat transfer-Calorie, calorie, or joule?
Calorie
Heat energy is measured in units of
Choices A and B are both true; joules and calories.
A temperature difference of 10 degrees Celsius is also equal to a temperature difference of 10 on the
Kelvin scale.
Which of these has the highest specific heat capacity?
Water
If a certain material heats up quickly and cools down quickly, the material has _______.
a low specific heat
The fact that desert sand is very hot in the day and very cold at night is evidence that sand has
a low specific heat.
When the temperature of a strip of iron is increased, the length of the strip _______.
also increases
Which is greater-an increase in temperature of 1 Celsius degree or an increase of 1 Fahrenheit degree?
an increase of 1 degree C is larger
Pour a liter of water at 40 degrees C into a liter of water at 20 degrees C and the final temperature of the two becomes
at or about 30 degrees C.
When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is
copper expands more than iron.
Aluminum has a specific heat capacity more than twice that of copper. Place equal masses of aluminum and copper wire in a flame and the one to undergo the greater increase in temperature will be
copper.
As a piece of metal with a hole in it cools, the diameter of the hole
decreases.
Consider a sample of water at 0 degrees C. If the temperature is slightly increased, the volume of the water
decreases.
When we speak about heat, we refer to _______.
energy in transit
When water at 4 degrees C is heated it expands. When water at 4 degrees C is cooled, it
expands.
When you touch a cold piece of ice with your finger, energy flows
from your finger to the ice.
The moderate temperatures of islands throughout the world has much to do with water's
high specific heat.
Some molecules are able to absorb large amounts of energy in the form of internal vibrations and rotations. Materials composed of such molecules have
high specific heats.
Which of the following contracts when the temperature is increased? Equal volumes of
ice water.
Ice has a lower density than water because ice
is made of open-structured, hexagonal crystals.
When an iron ring is heated, the hole becomes
larger.
Hot sand cools off faster at night than do plants and vegetation. This indicates that the specific heat capacity for sand is _______.
less than that of plants
Microscopic slush in water tends to make the water density
less.
Does a substance that heats up quickly have a high or a low specific heat capacity?
low specific heat capacity
A substance that heats up relatively quickly has a
low specific heat.
In a glass of water at room temperature, do all the molecules have the same speed?
no
Ice tends to form first at the
surface of bodies of water.
The white-hot sparks that strike your skin from a 4th-of-July-type sparkler don't harm you because
the energy per molecule is high, but little energy is transferred because of the few molecules in the spark.
Which defines temperature - translational kinetic energy, rotational kinetic energy, vibrational kinetic energy, or all of these?
translational kinetic energy
Consider a closed, sealed can of air placed on a hot stove. The contained air undergoes an increase in
two of these; pressure and temperature.
Which of the following expands when the temperature is lowered? Equal volumes of
water at 4 degrees C.
During a very cold winter, water pipes sometimes burst. The reason for this is
water expands when freezing.
