heat transfers to the coldest thing in the area. there for, there is no such thing as hot or cold because when something is cold all you really feel in the loss of heat from your hand to the cold object. same goes for hot. all you really feel is the large amounts of heat that hot object is giving you.
The direction that heat flows in is From a warmer object to a cooler object.
Friction's direction is always against the direction work is being applied to.
Heat can usually be considered as the energy of motion of atoms and molecules. Heat can flow spontaneously only from warm to cold. Heat can be made to go in the other direction, but only by doing work. So, the simple answer is: from warm to cold.
To create vacuum. Heat doesn't travel from one side to the other (in either direction) if there is no matter. Temperature is basically a measure of the amount of vibrational energy particles have. No particles, no temperature, except via eletromagnetic radiation, which can travel through vacuum.
yes
Thermal energy always travels from an object at a higher temperature to an object at a lower temperature, in the direction of decreasing temperature. This transfer of thermal energy is known as heat transfer.
no
Heat travels from Hot to cold. Not up!
Heat will always travel from an area of higher temperature to an area of lower temperature, following the principle of thermal equilibrium.
Waves waves
Heat energy always flows from a region of higher temperature to a region of lower temperature. This process continues until thermal equilibrium is reached, where both regions have the same temperature.
Heat travels from a region of higher temperature to a region of lower temperature.
it moves hot to cold.
Heat energy travels in all directions in radiation, moving away from the object that is the source of the heat.
Yes, Heat always flows from the coldest to Hottest point in an object
Heat always travels from areas of higher temperature to areas of lower temperature. the surface and sides of a container of soup are generally at a lower temperature than the interior of the soup. Of course you may still get some additional heat transfer via convection if the surface is cooler than the soup deeper in the container.
Because of the one-way valves.