Physical Science

On a chilly 10°C day, your friend who likes cold weather, wishes it were twice as cold. Taken literally, this temperature would be

-131.5°C.

The lowest temperature possible in nature is

-273 degrees C

You add 500 units of Heat to 50 grams of a substance with a heat capacity of 1. What is the unit change in Temperature. (Note assume all units are compatible).

10

When 100 J of heat is added to a system that performs 60 J of work, the thermal energy change of the system is

40 J

It is important that the two metals that compose a bimetallic strip have

different rates of expansion.

When most substances are heated, molecules inside move faster and take up more space, resulting in thermal

expansion

When a volume of air is compressed and no heat enters or leaves, the air temperature will

increase

As a system becomes more disordered, entropy

increases

Ice has a lower density than water because ice

is made of open-structured, hexagonal crystals.

A substance that heats up relatively quickly has a

low specific heat capacity

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 capacity.

If the specific heat capacity of water were lower than it is, ponds in the cold of winter would be

more likely to freeze

Entropy is closely related to the

second law of thermodynamics

The specific heat capacity is highest for substances that absorb or release large quantities of heat for correspondingly

small temperature changes.

Tomatoes have a higher specific heat capacity than dough. This means that when you bite into a hot pizza

the tomato sauce feels hotter than the dough.

The fact that a thermometer "takes its own temperature" illustrates

thermal equilibrium

Which of the following normally warms up faster when heat is applied? iron

· a. water · b. iron correct answer · c. glass · d. wood

Which temperature scale labels the freezing point of water at 0 degrees?

Celsius

Pour a liter of water at 40°C into a liter of water at 20°C and the final temperature of the two becomes

at or about 30°C

Consider a piece of metal that is at 5°C. If it is heated until it has twice the thermal energy, its temperature will be

283°C

Which temperature scale labels the freezing point of water at 32 degrees?

Fahrenheit

Temperature is related mostly to the ________.

average molecular kinetic energy in a substance

When ice water at 0°C is heated

both occur until 4°C is reached

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 fastest increase in temperature will be

copper

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.

When work is done by a system and no heat added to it, the temperature of the system

decreases

When you touch a cold piece of ice with your finger, energy flows

from your finger to the ice.

The fact that gasoline overflows a full tank on a hot day is evidence that

gasoline expands more with increasing temperature than its tank.

If you measure the distance between two telephone poles with a steel tape on a very hot day, your measured distance will be

a bit short

Heat energy is measured in units of

both of these joules and calories