Energy: Question Preview (ID: 7854)


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In winter the second floor of a house is warmer than the first floor of a house. Which of the following describes the method of heat transfer causing the difference in temperature
a) radiation from the room b) heat transfer through the walls c) convection currents in the room d) conduction from the heater
Which of the following is the best example of conduction?
a) the sun warming the Earth. b) butter melting on a hot potato c) a swimming pool warming d) ice melting in a cup
A flashlight uses 3 different forms of energy. Which of these is correct?
a) electrical to radiant to thermal b) chemical to radiant to electrical c) chemical to electrical to radiant d) radiant to chemical to electrical
A hotplate boiling water is what type of energy transfer?
a) heat to electrical b) electrical to radiant c) electrical to heat d) heat to mechanical
If you leave your metal spoon in your hot spaghettios, how is the heat transferred?
a) by conduction b) by radiation c) by convection d) by mechanical means
Gasoline is used to power a car. Which of these is the main energy transformation as the fuel is used by the engine?
a) electrical energy is converted to heat energy. b) heat energy is converted to potential energy. c) electrical energy is converted to kinetic energy d) chemical energy is converted to kinetic energy
Sunlight heating a home what type of energy transfer?
a) conduction b) convection c) radiation d) mechanical means
A fan cooling off a person is an example of what type of energy transfer?
a) mechanical to electrical b) heat to electrical c) mechanical to thermal d) electrical to mechanical
A lava lamp is an example of what type of energy transfer?
a) conduction b) convection c) radiation d) mechanical means
Warming your hands on a cold day with a cup of hot chocolate is what type of heat transfer?
a) conduction b) convection c) radiation d) mechanical means
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