Thermal Conductivity of Materials

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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?

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?

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?

Because it causes thermal energy to be wasted Signup and view all the answers

What is the purpose of infrared cameras in night-vision goggles?

To view objects without visible light Signup and view all the answers

What happens to energy when it changes form or performs work?

It is wasted as thermal energy Signup and view all the answers

Which material from the table would be the best thermal insulator?

Oak wood Signup and view all the answers

Why do solids have higher thermal conductivity than liquids and gases?

Because particles are closer together Signup and view all the answers

What is the main reason why water has a high heat capacity?

Because water molecules are strongly attracted to one another Signup and view all the answers

What would be the best material for building a fireplace?

Material with low heat capacity Signup and view all the answers

Why does animal fur make a good insulator?

Because it traps air within it Signup and view all the answers

What would happen if you recorded the temperatures of water and sand in separate cups?

The sand would heat up faster than the water Signup and view all the answers

How does thermal energy travel through radiation?

At the speed of light Signup and view all the answers

What is the primary reason conduction is slower than radiation and convection?

Thermal energy must move through all particles in between Signup and view all the answers

Which of the following is a characteristic of a good thermal conductor?

It conducts energy easily Signup and view all the answers

What is the speed of thermal energy transfer through convection currents?

56 m/s Signup and view all the answers

What is the term for the ability of a material to transfer thermal energy?

Thermal conductivity Signup and view all the answers

What is the primary difference between conduction and convection?

Method of energy transfer Signup and view all the answers