physical science exam 2

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Polarization is similar to

None of the choices are correct.

chapter 7: The wavelength of a sound wave is not related to its

amplitude.

energy chapter: A 1-kg mass has a KE of 1 J when its speed is

1.4 m/s.

energy chapter: A 90-kg llama has an average power output of 80 W. The minimum time the llama can go up a hill 500 m high is

1.5 h.

chapter 3 energy: The KE of a 900-kg car whose speed is 60 km/h is

125 kJ.

chapter heat : The specific heat of water is 4.2 kJ/kg°C. The heat needed to warm 8 kg of water from 20°C to 70°C is

1680 kJ.

chapter 7waves: When a sound wave goes from air into water, the quantity that remains unchanged is its

frequency.

energy chapter: Rolling a ball up an inclined plank requires an amount of work proportional to the

height the ball is raised.

chapter heat: Heat transfer by conduction occurs

in liquids, solids, and gases.

chapter heat: When a liquid freezes to become a solid,

it gives off heat.

chapter7 wave: In a transverse wave, the individual particles of the medium move

perpendicular to the direction of travel.

chapter wave: An example of a wave that is partly longitudinal and partly transverse is a

water wave.

chapter heat: The specific heat of ice is 2.1 kJ/kg°C. When 50 kJ of heat is removed from 2 kg of ice initially at -5°C, the final temperature of the ice is

-17°C.

chapter heat: At which of the following Celsius temperatures will a Fahrenheit thermometer show the same reading in degrees?

-40°C

energy chapter: A 1-N weight has a PE relative to the ground of 1 J when it is at a height of

1 m.


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