Physics Final P1

Both black and white road surfaces radiate energy. At midnight on a starry night the warmer road surface is the: white surface black surface neither, as no noticeable difference

white surface

A block of wood and a block of copper will feel neither hot nor cold to the touch when they each have: equal conductivities your temperature equal temperatures. none of the above

your temperature

When 10 grams of hot water cool by 1°C, the amount of heat given off is: 41.9 joules 41.9 calories. more than 41.9 joules. 41.9 Calories. none of the above

41.9 joules

A 60-vibration-per-second wave travels 30 meters in 1 second. Its frequency is: 60 hertz and it travels at 30 m/s 30 hertz and it travels at 60 m/s 1800 hertz and it travels at 2 m/s none of the above

60 hertz and it travels at 30 m/s

The mass of ice that can be melted by 1 gram of 100°C steam is (Hint: Don't forget about hot water remaining from condensed steam.): 6.75 grams 8 grams 0.125 gram 0.148 gram none of the above

8 grams

If you wish to expand the volume of a sample of water at 4°C: lower its temperature a bit. raise its temperature a bit either of these neither of these

either of these

When sound waves superimpose they can interfere: destructively constructively either of these neither of these

either of these

One reason for the higher pitch of your voice after you've inhaled some helium is that sound travels: the same speed in helium but with a longer wavelength slower in helium than in air faster in helium than in air

faster in helium than in air

A bow wave is produced when a speed boat moves: as fast as the waves it produces faster than the waves it produces nearly as fast as the waves it produces none of the above

faster than the waves it produces

The addition of salt to water affects its: liquidity. freezing point crystal composition. viscosity. none of the above

freezing point

When you touch a hot potato with your finger, energy flows: from your finger to the potato. from the potato to your finger actually, both ways

from the potato to your finger

The phenomenon of beats is a result of sound: interference reflection refraction all of the above none of the above

interference

To turn 1 gram of boiling water to steam requires? as much as increasing 1 kilogram of 95°C water to the boiling point more energy than needed to turn 1 gram of absolute-zero ice to the boiling point almost as much energy as changing 1 gram of 0°C water to the boiling point. none of the above

more energy than needed to turn 1 gram of absolute-zero ice to the boiling point

Place a 1-kilogram block of iron at 20°C into 1 kilogram of water at 40°C and the final temperature of the two becomes: less than 30°C. at or about 30°C. more than 30°C

more than 30°C

The most responsible factor for whether a substance takes the phase of solid, liquid, gas, or plasma is its: composition temperature atomic shell configuration none of the above

temperature

Which involves a larger number of calories? the cooling of 1 gram of water at 100 degrees Celsius to 1 gram of ice at absolute zero the condensation of 1 gram of steam at 100°C to water at 100°C both the same none of these

the condensation of 1 gram of steam at 100°C to water at 100°C

You can add heat without raising temperature to: ice boiling water both of these neither of these

both of these

You can add heat without raising temperature to: melting ice boiling water both of these neither of these

both of these

Which will melt more ice when placed on its surface, a kilogram of wood or a kilogram of iron of the same high temperature? 1 kg of iron 1 kg of wood both the same neither of these

1 kg of iron

A 340-hertz sound wave travels at 340 m/s in air with a wavelength of: 1 m 10 m 1000 m 100 m none of the above

1 m

If you measure the width of an outdoor barn with a steel tape on a very cold day, your measured width will be? a bit long the same as on an average-temperature day. a bit short

a bit long

Evaporation is a cooling process and condensation is: a warming process. a cooling process also. neither of these

a warming process

A standing wave is likely produced when: the speed of the wave is zero or near zero a wave reflects upon itself two waves overlap the amplitude of a wave exceeds its wavelength

a wave reflects upon itself

When vapor transforms to a plasma, energy must be: absorbed by the vapor released from the vapor both of these neither of these

absorbed by the vapor

The vibrations of a longitudinal wave move: that changes with speed at right angles to the direction of wave travel along the direction of wave travel

along the direction of wave travel

The main difference between a fog and a cloud is: altitude seeding temperature water vapor content density of vapor

altitude

Blow on your hand with your mouth open. Then do the same with your lips puckered and you'll find: the breath from puckered lips is cooler. a difference in temperatures both of these neither of these

both of these

Steam burns are more damaging than burns caused by boiling water because steam: releases additional energy when it condenses has more energy per gram than boiling water both of these neither of these

both of these

The toy drinking bird nicely illustrates: condensation evaporation both of these neither of these

both of these

Water can be brought to a boil by: reducing air pressure on its surface. applying heat. both of these neither of these

both of these

Ice is put in a cooler to cool the contents. To speed up the cooling process, the ice can be: drained of water periodically. kept away from the food. broken into smaller pieces wrapped in newspaper. none of the above

broken into smaller pieces

When condensation occurs inside your bedroom window, the air outside is appreciably? warmer colder both of these neither of these

colder

You can safely hold your fingers on both sides of a candle flame due mainly to: convection radiation conduction none of the above

convection

A canteen that is wet on the outside results in water inside that is: cooler warmer both of these neither of these

cooler

If you quickly run away from the orchestra at a concert, the frequency of the sound you hear will be: increased decreased neither of these

decreased

If a pizza radiates more energy than it absorbs, its temperature: increases. is unaffected decreases none of the above

decreases

A Doppler effect occurs when a source of sound moves towards you away from you either of these neither of these

either of these

Which of the following expands more when the temperature is increased? Equal volumes of what: wood. iron. helium ice water. all expand the same.

helium

On a cold day your feet feel warmer on a rug than on a tile floor because a rug: for the same mass has more internal energy than tile is a poorer conductor is usually warmer than tile all of the above none of the above

is a poorer conductor

Hydrogen and oxygen molecules in a sample of gas have the same temperature. This means the hydrogen molecules, on average, have the same: kinetic energy, but more speed speed, but more kinetic energy speed, but less kinetic energy speed and the same kinetic energy kinetic energy, but less speed

kinetic energy, but more speed

Resonance occurs with forced vibration that requires the: least amount of energy input matching of wave amplitudes maximum amount of energy input minimum beat frequency matching of constructive and destructive interference

least amount of energy input

The fact that desert sand is very hot in the day and very cold at night is evidence that the specific heat capacity of sand is relatively: practically absent. low high

low

The reason you can walk barefoot on red-hot coals of wood without burning your feet mainly involves: mind over matter techniques low temperature of the coals low conductivity of the coals

low conductivity of the coals

A substance that cools down faster than others has a: low specific heat capacity high specific heat capacity. either of these neither of these

low specific heat capacity

When you walk barefoot on red-hot wooden coals it is best if: you impress your friends by carrying away bits of wood between your toes no pieces of metal are among the coals you walk slowly to demonstrate your courage all of the above none of the above

no pieces of metal are among the coals

Dean teaches that the phenomenon of regelation is due to the: high specific heat of water freezing point of water melting point of ice open-structured nature of ice crystals

open-structured nature of ice crystals

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

pressure

When moth balls sublime to gas they: absorb energy release energy both of these neither of these

release energy

When a vapor condenses, energy is: absorbed by the vapor released from the vapor both of these neither of these

released from the vapor

When heat is added to boiling water, its temperature: decreases remains unchanged increases none of the above

remains unchanged

Reports are that singer Caruso was able to shatter a crystal chandelier with his voice, which illustrates: sound refraction interference beats an echo resonance

resonance

A base fiddle is louder than a harp because of its: sounding board lower pitch thicker strings all of the above none of the above

sounding board

When slow-moving water molecules collide they tend to: stick rebound without sticking. both of these neither of these

stick

A water-filled paper cup held in a flame will not catch fire. This is because the inside of the paper is: wet paper is a poor conductor of heat water is an excellent conductor of heat the paper cup cannot become appreciably hotter than the water it contains

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

The fact that a thermometer "takes its own temperature" illustrates: energy conservation. the fact that molecules are constantly moving. thermal equilibrium the difference between heat and internal energy.

thermal equilibrium

When sound travels faster near the ground than above, bending of sound tends to be: to the left upward to the right downward none of the above

upward

During snow fall, the surrounding air is cooled warmed both of these neither of these

warmed

When water freezes, the surrounding air is: cooled. warmed both of these neither of these

warmed

When water vapor condenses on the inside of a window, the room becomes slightly.: warmer cooler both of these neither of these

warmer