Podcast
Questions and Answers
What is the primary reason why drinking cold water cools you down?
What is the primary reason why drinking cold water cools you down?
- It is in a liquid state
- It has low thermal conductivity
- It absorbs thermal energy from the body
- It has high heat capacity (correct)
What happens to the energy that is lost to friction in machines?
What happens to the energy that is lost to friction in machines?
- It is stored as potential energy
- It is used to perform work
- It is converted into kinetic energy
- It is wasted as thermal energy (correct)
What is one way that thermal energy is used in industry?
What is one way that thermal energy is used in industry?
- To power cars
- To cut stone
- To generate electricity
- To make metals harder and more brittle (correct)
Why does friction cause machines to break over time?
Why does friction cause machines to break over time?
What is the purpose of infrared cameras in night-vision goggles?
What is the purpose of infrared cameras in night-vision goggles?
What happens to energy when it changes form or performs work?
What happens to energy when it changes form or performs work?
Which material from the table would be the best thermal insulator?
Which material from the table would be the best thermal insulator?
Why do solids have higher thermal conductivity than liquids and gases?
Why do solids have higher thermal conductivity than liquids and gases?
What is the main reason why water has a high heat capacity?
What is the main reason why water has a high heat capacity?
What would be the best material for building a fireplace?
What would be the best material for building a fireplace?
Why does animal fur make a good insulator?
Why does animal fur make a good insulator?
What would happen if you recorded the temperatures of water and sand in separate cups?
What would happen if you recorded the temperatures of water and sand in separate cups?
How does thermal energy travel through radiation?
How does thermal energy travel through radiation?
What is the primary reason conduction is slower than radiation and convection?
What is the primary reason conduction is slower than radiation and convection?
Which of the following is a characteristic of a good thermal conductor?
Which of the following is a characteristic of a good thermal conductor?
What is the speed of thermal energy transfer through convection currents?
What is the speed of thermal energy transfer through convection currents?
What is the term for the ability of a material to transfer thermal energy?
What is the term for the ability of a material to transfer thermal energy?
What is the primary difference between conduction and convection?
What is the primary difference between conduction and convection?
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