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A heat pump can do that - for example, a refrigerator or an air conditioning system. This does require energy - heat will freely go only from hotter to colder bodies.
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What factor free covection heat flow depends?
The only factor that free convection heat flow depends on is the conductivity of the material. Heat moves toward a cold area and heat it up and the reverse is true for cold, it will cool down something warm.
Does cold absorb heat?
Sort of. In terms of physics, technically there is no such thing as cold. There is only heat, which is than measured on a scale to show how much heat is present. Heat will always transfer to something that has less heat than its present location. So technically no, cold does not absorb heat because cold is a perspective and not something that actually exists.. However, things that have less heat do absorb heat from things with more heat than itself. Cold is an abstract non physics word used to describe things with small amounts of heat, while in reality there is technically at least some measurable amount of heat if compared to true absolute 0 heat.
Which statements are true about a block of ice at -10 C as you continue to apply heat?
The ice is melted after 0C.
What direction does heat trasfer?
Heat moves from a Hot surface to a cold surface in an atempt to acheive thermal equilibrium. This is true in most energy transfers High energy ALWAYS transfers to lower energy.
Why flannel keeps ice unmelted but people warm?
Flannel acts as an insulator, keeping things at the same temperature. It slows down heat transfer with the surroundings. If what you wrap it in is colder than the surroundings, then it will take longer to warm up. If what you wrap in it is warmer than the surroundings, it will take longer to cool down. Ice can stay cold and people can stay warm. The same concept is true for the common thermos bottle - you can keep hot chocolate hot in it or cold juice cold. Note that in the case of people, we are constantly producing body heat from our metabolism so all the flanel has to do in order to keep us warm is to slow the heat transfer to a rate that is less than or equal to the rate at which our bodies are producing heat.
Is it true that a hotter object always has a greater amount of heat than a cold object also give example?
yes it is true
What factor free covection heat flow depends?
The only factor that free convection heat flow depends on is the conductivity of the material. Heat moves toward a cold area and heat it up and the reverse is true for cold, it will cool down something warm.
Why is it important that there is a heat balance around the earth?
so that heat and cold dont collide and make a sharknadoe (movie is based on a true story)
How heat transfers from a hot object to a cold object - illustration?
heat moves from warmer objects to cooler objects a-p-e-x quiz
Does cold absorb heat?
Sort of. In terms of physics, technically there is no such thing as cold. There is only heat, which is than measured on a scale to show how much heat is present. Heat will always transfer to something that has less heat than its present location. So technically no, cold does not absorb heat because cold is a perspective and not something that actually exists.. However, things that have less heat do absorb heat from things with more heat than itself. Cold is an abstract non physics word used to describe things with small amounts of heat, while in reality there is technically at least some measurable amount of heat if compared to true absolute 0 heat.
Why fingers expand in heat and contract in cold?
They expand in heat to allow blood to reach the extremities to be cooled.. Exactly the opposite is true when there cold.. Blood is drawn away from the extremities to help keep vital organs warmer.
What is bergmann's rule?
Bergmann's rule is an ecogeographic principle that states that within a species, individuals tend to be larger in colder climates and smaller in warmer climates. This pattern is thought to be an adaptation to efficiently conserve body heat in colder environments and dissipate heat in warmer environments.
Are reptiles cold blooded true or false?
True - they don't have any way to regulate their own temperature, like mammals do. Instead - they rely on absorbing warmth from a heat source such as the sun (or a heat lamp in captivity).
True or false males generally do not have barr bodies?
True(:
Which statements are true about a block of ice at -10 C as you continue to apply heat?
The ice is melted after 0C.
True or false insulation rated R-35 allows more heat to pass through it than insulation rated R-1?
false
Why are foam cups used for both hot and cold drinks?
Foam - styrofoam is an excellent insulator. With a hot drink - you want it to remain hot - so you do NOT want heat to move out of the drink to the cooler outside. The styrofoam vastly reduces this heat flow. With a cold drink, the reverse is true. You want it to remain cold so you do not want heat to move from your hand or the outside atmosphere into the drink. The styrofoam vastly reduces this heat flow.
