Physics Test 3

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

If a volume of air is warmed, it expands. If a volume of air expands, it

cools.

Consider a sample of water at 0 degrees C. If the temperature is slightly increased, the volume of the water

decreases.

If a blob of air is swept upward, with no heat input or output, its temperature

decreases.

When heat is added to boiling water, its temperature

does not change.

To turn ice at zero degrees Celsius to water at zero degrees Celsius, we must add

energy.

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

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

gives up additional energy when it condenses and has more energy per kilogram than boiling water are both correct.

The reason the sun's radiant energy is of shorter wavelengths than the Earth's is because the sun

has a higher temperature than the Earth.

The moderate temperatures of islands throughout the world has much to do with water's

high specific heat

Food in a pressure cooker is cooked faster because of the

higher temperature.

In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of

hydrogen

To wholly convert a given amount of heat energy into mechanical energy is

impossible regardless of the technique used.

Suppose you rapidly stir some raw eggs with an eggbeater. The temperature of the eggs will

increase.

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

iron

Ice has a lower density than water because ice

is made of open-structured, hexagonal crystals.

Water will evaporate quicker if it

is preheated to 100 degrees C, is spread out in a thin sheet, and is surrounded by dry air are all correct.

Heat energy is measured in units of

joules and calories are both true.

A Thermos bottle has double glass walls with silver coating on the glass surfaces that face one another. The silver coating reduces the energy that is transferred by

radiation.

The food in a refrigerator is cooled by

vaporization of the refrigerating fluid.

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

warmer.

To totally convert a given amount of mechanical energy into heat is

possible.

Which could burn a boy scout the most?

100 g of steam at 100 degrees C

The amount of energy ultimately converted to heat by a light bulb is about

100%.

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

283 degrees C.

Room temperature on the Kelvin scale is about

300 K.

The temperature at the bottom of Lake Tahoe, high in the Sierra Nevada Mountains in California, at this moment is

4 degrees C.

One hundred joules of heat is added to a system that performs 60 joules of work. The internal energy change of the system is

40 J.

A good heat conductor is

a poor insulator.

When a solid is changed to a liquid state, the solid

absorbs energy.

Metals are both good heat conductors and good electrical conductors because of the

looseness of outer electrons in metal atoms.

A substance that heats up relatively quickly has a

low specific heat.

Systems that are left alone, tend to move toward a state of

more entropy.

During an adiabatic compression of an ideal gas,

no heat is supplied to or removed from the gas

Both black and white road surfaces radiate energy. At the end of a starry night the warmer road surface will be

the black surface.

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.

A water-filled paper cup held in a flame will not catch fire. This is because

the paper cup cannot become appreciably hotter than the water it contains.

The higher the temperature of an object,

the shorter the wavelengths it radiates.


Kaugnay na mga set ng pag-aaral

Chapter 19 Heart and Neck Vessels

View Set

Unit 7 Assignment: The Benefits of Exercise and Total Fitness

View Set

13 Biológiai membránok, membrántranszport

View Set

Chapter 1 - Accounting : The Language of Business

View Set