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
