Heat

Question 1

The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?

Revolt · Accepted Answer

They must be cooler than the air inside the house.

Question 2

What must be true about two objects if heat is flowing between them?

Revolt · Accepted Answer

The objects must be different temperatures.

Question 3

This chart lists four examples of two objects that are in contact.Which statement accurately describes the flow of heat in each example?

Revolt · Accepted Answer

Heat will flow from Object 1 to Object 2 in examples 1, 2, and 4, and heat will flow from Object 2 to Object 1 in Example 3.

Question 4

Which refers to the amount of heat required to change the temperature of 1 gram of a substance by 1°C and is related to the chemical composition of the substance?

Revolt · Accepted Answer

Specific heat

Question 5

Which substance has the most thermal energy and will have the most heat flow from it?

Revolt · Accepted Answer

a nuclear reactor core (1000°C)

Question 6

Which factors affect heat transfer between a warm and a cool substance?

Revolt · Accepted Answer

the amount of time of contact, the area of contact, and the specific heats of the substances

Question 7

Isaac wants to make s'mores. He holds a marshmallow on a metal skewer over a fire. A few seconds later, the marshmallow is cooked and the skewer feels warm. What most likely happened?

Revolt · Accepted Answer

Thermal energy in the form of heat moved from the fire to the skewer and marshmallow.

Question 8

If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them?

Revolt · Accepted Answer

from the cup to the hand

Question 9

Which best describes the direction of heat?

Revolt · Accepted Answer

from a warmer substance to a cooler substance

Question 10

Shelly tells a friend that her computer needs to be fixed because it has been producing a lot of heat and is smoking. Where is the error in her statement?

Revolt · Accepted Answer

Her computer is producing thermal energy, not heat.

Heat Answers

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