physical science exam 2
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.
