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A hot potato at 80 ºC is placed in a bowl of soup at 40 ºC. The surrounding room is at 20 ºC. Which correctly describes the directions of thermal energy transfer?
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
A lizard sits on a hot rock to get warm. What type of thermal energy transfer is occurring?
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
Four objects are all made of iron. Which has the most total thermal energy?
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
A student wants to raise the temperature of 200 g of water from 25 °C to 50 °C by adding a hot piece of iron metal. Which of these properties of the iron will the student need to know to carry out the experiment?
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
What is thermal energy?
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
Temperature is a measure of average kinetic energy
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
How might using a pizza stone instead of a pan affect how a pizza cooks faster?
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
Thermal energy is a measure of total kinetic energy
a nail at 100 °C
potato to soup, and soup to room
the total kinetic energy in an object
True
mass and volume
the stone transfers energy slowly, so the crust cooks evenly
conduction
true
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