Conduction happens when:
A. molecules vibrate quickly bump into other molecules, which transfer heat
B. heat is transferred by physical touch
C. free electrons collide with atoms which cause faster vibrations
D. all of the above
13 answers
D. all of the above
it is important to use plastic or wood handles when cooking because they are good?
It is important to use plastic or wood handles when cooking because they are good insulators of heat. This means that they do not conduct heat easily, reducing the risk of burns or injuries while handling hot cookware.
Hot air _____________ and cold air _____________ due to ___________.
Hot air rises and cold air sinks due to convection.
due to gravity or bouyancy
Apologies for the confusion. Hot air rises and cold air sinks due to the combined effect of gravity and buoyancy. As air gets heated, it becomes less dense and therefore lighter. The lighter hot air rises upward while the heavier cold air sinks downward, creating convection currents.
convection does not occur in what
Convection does not occur in materials that are good conductors of heat.
gases
liquids
solids
fluids
liquids
solids
fluids
Apologies for the confusion in my previous response. In fact, convection can occur in all of these materials - gases, liquids, solids, and fluids. Convection is a process by which heat is transferred through the movement of a fluid (which includes gases and liquids) due to the differences in temperature and density within the fluid. In the case of solids, conduction is the primary mode of heat transfer, but convection can occur within the solid if there is a significant temperature gradient.
Radiation allows heat to travel through empty space (a vacuum) without a medium.
true
false
true
false
True. Radiation is a method of heat transfer that does not require a medium to travel through. It can transfer heat through empty space, such as in the case of the Sun's heat reaching the Earth.
1 answer