Thermal Physics
Thermal Physics
Thermal Physics
Thermal Physics
Thermal Physics
100
In what direction does heat move?
From hot to cold
100
What property can we measure to determine the internal energy of a substance?
Temperature
100
The sparks emitted by a sparkler are very hot, but the sparks don't burn you because each spark has only a little bit of this to transfer to your hand.
thermal energy
100
These are the three methods by which thermal energy can be transferred among objects.
conduction, convection, and radiation?
100
What is one way of speeding up the evaporation of a liquid?
1) Heat the liquid to a higher temperature.
2)Blow wind/air across the surface of the liquid
3) Increase the liquid surface area exposed to the air
200
Why does a metal doorknob feel cold to the touch?
Metal is a good conductor of heat and transfers heat quickly
200
At the molecular level, what do the molecules have because of the internal energy of the substance?
The molecules have kinetic energy
200
Heat transfer through solids.
Conduction
200
hat is the name usually given to a solid substance which does not conduct heat well?
An insulator
200
This is the kind of electromagnetic radiation that can be seen by the human eye.
visible light
300
Why does hot or warm air rise?
It has a lower density
300
What is the name given to the electromagnetic transfer of radiation
Infrared
300
What is the category and names given to the two states of matter that may exhibit convection?
Fluids: liquids and gases.
300
Conduction usually involves collisions of this kind of subatomic particle.
electron
300
Thermal energy is this kind of quantity.
scalar quantity
400
This is the only kind of heat transfer which can occur in a vacuum.
radiation
400
In which state of matter does conduction primarily occur due to closely packed particles?
solid
400
Why are air conditioning units always at the top of the room?
Cold air sinks, creating a convection current that circulates cold air throughout the room.
400
Heat is transferred by the circulation of movement of a liquid or gas.
convection
400
Why is the inside of a vacuum flask silvered?
It reflects heat back into the liquid contained, as well as having very low absorption