3NA Phy - Thermal equilibrium and conduction

The condition where two substances in physical contact with each other exchange no heat energy. They are said to be the same temperature.

• Thermal Energy

• Cooler to Warmer

• Energy Transfer

• Thermal Equilibrium

heat always travels from _____ to ______ objects

• hotter to colder

• colder to hotter

• colder to cold

• hotter to hot

Two objects have different temperatures. Object A has a temperature of 42 degrees and Object B is 37 degrees. Which direction should the energy transfer between Objects A and B?

• From Object A to Object B

• From Object B to Object A

• Energy will not transfer

• Energy will transfer both directions

What happens to the temperature if I add ice cubes to a glass of soda

• The heat transfers from the coke to the ice

• The heat transfers from the ice to the coke

You leave your cold spoon in a hot bowl of oatmeal. What happens after an hour?

• The temperature of both the oatmeal and the spoon stay the same

• The spoon and the oatmeal become the same temperature

• Only the temperature of the oatmeal will change

• Only the temperature of the spoon will change

Johnny put ice in his water. Which idea do you think best explains why the water got cold?

• The coldness from the ice moved into the water

• The coldness and the heat moved back and forth until the water cooled off.

• The heat from the water moved into the ice.

• The water does not cool of

After taking a hot shower, James steps out of the shower onto the tile floor. The tile felt cold to his feet. Which explanation below best describes James' experience?

• Heat from his feet is transferred to the tile floor
• Heat from the tile floor is transferred to his feet
• Cold from the tile floor is transferred to his feet
• Cold from his feet is transferred to the tile floor

List the correct order of conduction.
1. They collide more frequently with neighbouring particles
2. Particles at the heated end gain kinetic energy and vibrate vigorously.
3. Neighbouring particles start to vibrate vigorously.

• 1, 2, 3
• 3, 2, 1
• 2, 1, 3
• 1, 3, 2

Which material is the best conductor of heat?

• Wood
• Plastic
• Glass
• Steel

Why do metals conduct thermal energy more quickly?

• Particles vibrate faster
• Due to the presence of bound electrons
• Due to the presence of free electrons
• Metals are grey