CH 17 quiz Practice copy, physics test ch17

A change in temperature of 10 deg is equal to a change of

10 K

Which would burn the most

100g of steam at 100 deg C

The number of calories released when 3 g of 100 deg steam cools to become 3 g of 0 deg ice is

2160 calories

An air sample contains 25% of the amount of water vapor it is capable of holding. The air's relative humidity is

25%

One thousand calories of heat are added to 150 grams of water when its temperature is 33 deg. The resulting temp is

40 deg

The energy needed to turn 43 g of 100 deg boiling water to 100 deg steam is

43 540 calories

Mix a liter of 70 deg water w 2 liters of 40 deg water and you'll have 3 liters of water at

50 deg

How much energy is released when 1 g of steam condense to water at 100 deg c

540 calories

Coffee percolator

A geyser such as Old Faithful in Yellowstone Park is similar to a

A good absorber of radiation is

A good emitter of radiation

Warm an environment, cool and environment Both of these

A heat pump can

A good reflector of radiation is

A poor absorber of radiation

Evaporation is a cooling process and condensation is

A warming process

A piece of paper wrapped around a thick metal bar will not ignite when touched with a lit match because

All of the above

Heat is measured in

All of the above

Without a temperature change

As a block of ice at 0°C melts, the block absorbs energy

without a temperature change.

As a block of ice at 0°C melts, the block absorbs energy

Temperature is related mostly to the

Average molecular kinetic energy in a substance

If you take a shower in a steamy bathroom and go to your bedroom to dry off, why will you feel colder

Because water evaporates off your skin and it cools

The energy content of a piece of food is normally determined by

Burning the food

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

Celcius

When water at 4 deg is heated, it expands. When water at 4 deg is cooled,

Contracts

Ice is put in a cooler to cool the food stored there. In order to speed the process, you should

Crush the ice

Open structured nature of ice crystals

Dean teaches that the phenomenon of regelation is due to the

A bimetallic strip will bend when heated because

Each metal expands at different rates

Heat is the

Energy transferred between objects because of a temperature difference

A warming process

Evaporation is a cooling process and condensation is

Sprayed as a fine mist

Firefighters find that the temperature of burning material is best lowered when water is

Energy transfer by convection is primarily restricted to

Fluids

Condensation occurs when matter changes from a

Gas to a liquid

When water freezes, it

Gives off energy

Steam burns are more damaging than burns caused by boiling water because steam

Has more energy per kilogram than boiling water

In a florist's greenhouse, glass acts as a one-way valve, letting

High frequency light in and preventing low frequency radiation from escaping

Broken into smaller pieces

Ice is put in a cooler to cool the contents. To speed up the cooling process, the ice can be

Wet

If bits of the coals do not stick to your feet while walking barefoot on red-hot coals, it would be best if your feet are

Neither of these- faster, slower still

In mountain regions, food cooked in boiling water cooks slower than when cooked at sea level. If the temperature beneath the pot of boiling water is increased, the food will cook

Pressure

In one word, how can water in the power plant of a nuclear submarine far exceed 100°C?

The largest extremes in temperature are usually experienced

In the middle of a continent

Prevent boiling

Increased air pressure on the surface of hot water tends to

Plastic foam is a good heat

Insulator

At high altitudes, the boiling point of water

Is lower

A liquid boils when

It turns to vapor at the bottom of or in the liquid

If the specific heat capacity of water were higher than it is, lakes would be

Less likely to freeze

Evaporation takes place when matter changes from a

Liquid to a gas

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

Cool the surrounding air

Melting snow tends to

A piece of metal will feel colder than a piece of wood at the same temperature because

Metals are good heat conductors

slow-moving water molecules sticking to one another.

Morning dew on the grass is a result of

Specific heat capacity is related to the amount of internal energy

Needed to change the temperature of one gram of a substance one degree

Infrared radiation is a form of

Radiant energy

Heat travels from the sun to the Earth by

Radiation

Planet Earth loses heat primarily by

Radiation

The metallic coating on the glass surfaces of a Thermos vacuum bottle reduces the amount of energy transferred by

Radiation

The reason pressure cookers cook food faster is that they

Raise the cooking temperature of the food

The formation of ice

Rapid evaporation of hot water can lead to

The reason light-colored clothes help you keep cool is that they

Reflect a lot of energy

When water vapor condenses on the inside of a window, the window becomes

Slightly warmer

When heat is added to boiling water, the temperature of the boiling water

Stays the same

On which day will the amount of water vapor in the air be greater, a summer day or winter day?

Summer day

Two pots are filled with boiling water. The pots are exactly the same size. One is white and the other is black

The black pot cools faster

7200

The calories needed to change 10 grams of ice at 0°C to steam at 100°C is

Altitude

The main difference between a fog and a cloud is

Temperature

The most responsible factor for whether a substance takes the phase of solid, liquid, gas, or plasma is its

To say that evaporation is a cooling process means that when evaporation occurs,

The remaining liquid cools

Evaporation

The surface of hot water has a relatively high rate of

Ice melts

The temperature at which water freezes is the same as the temperature at which

Newton's law of cooling says that the rate of cooling depends on

The temperature difference between an object and its surroundings

100 calories

To increase the temperature of 50 grams of water by 2 Celsius degrees requires

Internal energy is the

Total amount of energy contained in an object

The cooling effect inside a refrigerator is produced by

Vaporizing the refrigeration liquid

When snow forms in clouds, the surrounding air

Warms

Which has the higher specific heat capacity, water or sand

Water

Which releases the most energy, 100 g of 100 deg water cooling to 50 deg, or 100 g of iron at 100 deg cooling to 50 deg

Water

Extracting energy, lowering the surrounding air pressure Both of these

Water can be turned to ice by

During a very cold winter, water pipes sometimes burst. The reason for this is

Water expands when freezing

The reason an ocean's temperature doesn't vary much from one season to the next is that

Water has a high specific heat capacity

Reduced pressure

Water in a car radiator sometimes boils explosively when the radiator cap is removed, which is due to sudden

Condensation, evaporation Both of these

What occurs in a pan of water placed outdoors on a warm day?

Colder

When condensation occurs inside your bedroom window, the air outside is appreciably

Stick

When slow-moving water molecules collide they tend to

Absorbed by the vapor

When vapor transforms to a plasma, energy must be

Warmed

When water freezes, the surrounding air is

Warmer

When water vapor changes phase to become water in a cloud, the surroundings become

Conduction, convection, and radiation

When you blow over hot soup to cool it you are helping

No pieces of metal are among the coals

When you walk barefoot on red-hot wooden coals it is best if

The condensation of 1 gram of steam at 100 degrees C to water at 100 degrees C

Which involves a larger number of calories?

1 kg of wood

Which will melt more ice when placed on its surface, a kilogram of wood or a kilogram of iron of the same high temperature?

Fire walkers who walk barefoot on red hot wooden coals depend on

Wood's poor conductivity

Evaporation

Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by