Physics Exam Semester2

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

from your finger to the ice

A substance that heats up relatively quickly has a...

low specific heat

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

high specific heat

Ice has lower density than water because ice..

is made of open-structured, hexagonal chrystals

Compared to a giant iceberg, a hot cup of coffee has..

higher temperatures, but less internal energy

Ice tends to form first at the...

surface of bodies of water

When an iron ring is heated, the hole becomes..

larger

Which of the following expands most when the temperature is increased? Equal volumes of..

gases

Consider a closed, sealed can of air places on a hot stove. The contained air undergoes an increase in...

two; pressure and temperature

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

water expands when freezing

The face that desert sand is very hot in the day and very cold at night is evidence that sand has..

low specific heat

Substances absorb heat energy by the process of..

conduction, convection, and radiation

A good hear conductor is..

a poor insulator

Your feet feel warmer on a rug than on your tile floor because your rug..

is a better insulator than your tile

At the same temperature, which will move with the grater speed in the air? light or heavier molecules?

light molecules

Cold water will warm to room temperature faster in a ____ (what color pot)?

black pot

An object will normally be a net radiator of energy when its temperature is...

higher than it's surroundings

It is common knowledge that a can of soda will cool faster in the coldest part of a refrigerator. Knowledge of Newton's law of cooling..

supports its common knowledge

Wrapping a hot potatoe in aluminum foil significantly reduces the rate at which it loses energy by...

radiation

the planet Earth loses energy mainly by..

radiation

If air were a better conductor of hear that it is, at night time the earth would be..

considerably colder

Both black and white road surfaces absorb sunlight. At the end of a sunny day the warmer road surface will be the white or black?

the white surface

Newton's Law of Cooling applies to objects that are..

both cooling and heating

one of the main reasons one can walk barefoot on red-hot coals of wood without burning the feet has to do with..

the low thermal conductivity of the coals

____ invented the thermometer in 1602.

Galileo Galilei

In theory, there is an upper limit to temperature. True or False?

false

The lowest temperature possible is..

-273 degrees celcius

The molecules that make up your physics book have..

kinetic and potential energies

To wholly convert a given amount of hear energy into mechanical energy is..

impossible regardless of the technique used

The first law of thermodynamics is a restatement of the

conservation of energy

Chinook winds tend to...

warm an environment

Systems that are left alone, tend to move in a state towards..

more entropy

A temperature inversion occurs when the upper layers of air are

warmer than that in the lower regions of air.

Entropy means..

messiness

Entropy is closely related to which law of thermodynamics?

second law of thermodynamics

Blow on tour hand with you moth open and you feel the warmth of your breath. Pucker your lips so you breath expands as you blow and your breath is..

cooler

The earth's atmosphere gets most of its hear...

near the surface of the earth

A quantity of water has more entropy when it is..

boiling

A process which takes place at a constant temperature is

an isothermal process

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

increase

When mechanical work is done on a system, there can be an increase in..

both temperature and internal energy

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

increase

Two identical blocks of iron, one at 10°C and the other at 20°C are put in contact. Suppose the cooler block cools to 5°C and the warmer block warms to 25°C. This would violate the..

2nd law of thermodynamics

Suppose you put a closed, sealed can of air on a hot stove burner. The contained air will undergo an increase in...

internal energy, temperature and pressure.

As a system becomes more distorted, entropy..

increases

Why does warm air rise?

because it's less dense than cold air

How much of the mater in the universe is composed of atoms?

100%

What happens to molecules when the temperature reaches absolute zero

all of their motions tops completely

Which takes up the most space?

a cube of steel at 100°C

What will happen if you heat a liquid to a high temperature?

it will become a gas

Which of the following are are electrically neutral? proton, neutron, electron, ion?

neutron

The image above illustrates the structure of an amorphous material. True or False

false

Which has greater density, a cup with 100mL of pure water or a jug of 1L of pure water?

both are same

Which has a greater mass, a cup with 100mL of pure water or a jug of 1L of pure water?

1L of pure water

which has a greater volume, a cup with 100 mL of pure water of a jug of 1L of pure water?

a jug of 1L of pure water

If the mass of an object doubles while the volume stays the same, what will happen tot he density of the object?

doubles

If the mass of the object stays the same while the volume decreases by half, what will happen tot he density of an object?

doubles

what is the correct SI unit for volume?

liters

What is the correct SI unit for density?

g/mL

This is a physical property that causes it to deform when a deforming force is applied and return back to the original state

elasticity

The amount of stretch or compression is directly proportional to the applied force. What is this law?

Hooke's Law

Squeezing an object, is an example of_____.

compression

a ______ is a curve that a hanging chain or a cable assumes when supported at its end and acted only by its own weight.

catenary

which has a greater density, H2 gas or 02 gas?

not enough info is given

diamond has a density value of 3.54 g/ml and lead has a density of 11.34 h/ml. Which is more dense?

lead

which weighs more, one liter of ice, or one liter of water?

water

a piece of gold has a mass of 1080.0 grams and a volume of 56mL. Find the mass of the gold. D=M/V

19.29 g/mL

true or false

there are only about 100 different kinds of atoms that combine from all substances

true or false

atoms are the smallest subdivision of matter that still remains its chemical properties

What makes an element distinct?

the number of protons

Molecular compounds are formed between..

two non-metals

which of the following is not a compound? air, ammonia, water,salt

air

Which of the following is not a mixture? granite, anmonia, air, beach sand

ammonia

In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of

electrons

the smallest particle of those listed below is:
molecule, atom,proton,quark

quark

Which has the greatest number of protons in nucleus? gold, mercury, lead. silver

gold

the air in the room has..
mass, weight, energy, or all

All

ionic compounds are formed between..

one metal and one non-metal

All of the following are isotopes of Hydrogen except,
protium, deuterium, tritium, or duodenum

duodenum

compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are...

the same age

a homogenous mixture is called a solution. true or false

true

soil is an example of a .....

heterogeneous mixture

water is an example of a...

compound

vertical columns on the periodic tables are called...

groups

oxygen is an example of an...

element

saline solution is a compound. true or false

false

___are formed when two or more elements chemically combine.

compounds

isotopes have: the same number of protons, different number of neutrons, a different mass number, more than one is correct.

more than one choice is correct

atoms are: ageless, perpetually moving, small, or all.

all

horizontal rows on the periodic table are called...

periods

one can _______ separate a mixture of salt, sand, and iron fillings.

physically

a dam is thicker at the bottom than at the top partly because..

water pressure is greater with increasing death

the pressure in a liquid depends on the liquids...(2)

density and depth

Pumice is a volcanic rock that floats. Its density is..

less than the density of water

a completely submerged object always displaces its own

volume of fluid

compared to the density of water, the density of a fish is...

the same

what is the buoyant force acting on a 10-ton ship floating in the ocean?

more than 10 tons

the buoyant force on an object is least when the object is..

partly submerged

blood pressure is normally greater in your...

feet

when holes are drilled through the wall of a water tower, water will spurt out the greatest horizontal distance from the hole closest to...

the bottom of the tower

a lobster crawls onto a bathroom scale submerged at the bottom of the ocean. Compared to its weight above the surface, the lobster will have an apparent weight under water that is...

less

ice cubes submerged at the bottom of a liquid indicate that the liquid...

is less dense than the ice

the volume of water displaced by floating 20-ton boat...

is the volume of 20 tons of water

compared to an empty ship, the same ship loaded with styrofoam will float..

lower in the water

buoyant force is greater on a submerged.. 1-cubic block of lead or of aluminum?

the same

a boat loaded with scrap iron floats in a swimming pool. When the iron is thrown overboard, the pool level will

fall

there is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which of the following is most likely? impossible, force on finger was huge but possible, force on his finger would have been less than 1 N, or both pressure and force would have been great.

force on his finger would have been less than 1 N

To multiple the input force of hydraulic lift, the input end should be the one having the _____ ______ piston.

smaller diameter poston

flatten a spherical meat ball into a hamburger and you increase its...

surface area

flatten a spherical meat ball into a hamburger and you increase its...

surface area

surface tension is a direct result of..

cohesive forces between two molecules in a liquid

which block applies less pressure on the table? a vertically laid block, or horizontally laid block?

vertically laid block

this state of matter takes the shape of its container.

water

this causes a water droplet to stick to the wall of a water bottle

adhesion

what is the equation for pressure?

p= force / area

what is the SI unit for pressure

Pa

sound waves are_____.

longitudinal

when air molecules become tightly packed together they are____.

compressed

A sound wave with a low amplitude sounds _____.

deep

sound waves travel faster if temperature is cold. true or false

true

which of these does sound travel fastest through? steel, water, rock, air

steel

what is the function of the ridges on your outer ear?

they direct sound into your middle ear

Your eardrum is like a real drum because both____.

vibrate

what is unique about the hammer, anvil, and stirrup?

smallest bones in your body

These carry electro-chemical signals from the inner-ear to the brain.

nerves

this tiny bone passes vibrations from the eardrum to the anvil.

hammer

the smallest bone in the human body is the ____.

stirrup

Cilia are,

tiny hairs that move when vibrated causing a nerve impulse to form.

we cannot hear sounds in outer space because
a. sound waves cannot travel in space.
b. only transverse waves travel in space
c. longitudinal waves require a medium to travel in
d. all
e. none

all

sound waves below 20 hertz are ____.

infrasonic and inaudible

sound waves above 20,000 hertz are ___.

ultrasonic and inaudible

when a hammer and a mug fall and hit the ground they sound different because. . .

they have different natural frequencies.

the collapse of the Tacoma Narrows Bridge in 1940 is an example of . . .

wind generated resonance

a foghorn has a ____ and a _____.

low pitch, low frewuency

the molecules in a room-temperature glass of water jostle around at a ___.

great variety of speeds

evaporation is a cooling process and condensation is a ___.

warming process

to say that evaporation is a colling process is to say that the...

more energetic particles escape.

a hot dog pants to..

help evaporation occur in his mouth and bronchial tract

steam burns are more dangerous than burns caused by boiling water because steam
a. gives additional energy when it condenses
b.has more energy per kilogram then boiling water
c.both are correct
d.both are incorrect

both are correct

we feel uncomfortable warm on a muggy day becasue water molecules are___

evaporating and condensing on our bodies at the same rate

when a gas is changed to a liquid, the gas

releases energy

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

releases energy

when heat is added to boiling water, its temperature___

it remains the same

for increased atmospheric pressure, the boiling temperature of a liquid___.

goes up

near the top of a mountain, water in an open pot boils at___

a lower temperature than at sea level

hot water has relatively high rate of

evaporation

to turn ice at zero degrees Celsius to water at zero degrees Celsius we must add___.

energy

when bringing water to a boil in the mountians, the time needed to reach the boiling point__.

less than at sea level

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

sprayed at a fine mist

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