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Most computers have fans to keep the computer from overheating. Which of these BEST describes why this is necessary?
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
The efficiency of an average gasoline powered car is about 20%. This means
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
What energy transformation takes place when a radio is plugged in and turned on?
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
Which statement BEST describes what happens to water molecules when the temperature of liquid water is increased?
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
A fire is used to drive a steam engine which moves a locomotive (train). Which of these forms of energy is used to move the locomotive?
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
A group of students walk into a cold classroom. After several minutes, they feel as though the temperature in the room has increased. Which of these statements BEST describes why the room feels warmer to the students?
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
Which examples best demonstrates the process of conduction?
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
Solar panels used light energy from the sun to create electricity. Which of these statements describes what happens to the energy during this process?
As the students move around, their bodies release heat energy into the room
Electrical to sound
The amount of energy stays the same but the energy changes form
A metal spoon gets warm when used to stir hot soup
Heat
The bonds become weaker, and the molecules move farther apart
The operation of the computer converts electrical energy to heat
The car uses 20% of the energy stored in the gasoline for motion
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