what is differnce between heat and temperature?
399781
Now, this answer depends on what you mean by Heat.  Strictly speaking Heat (symbol 'Q')is the energy transferred from one part of a substance to another, or from one object to another due to a change in temperature.  To give you an example, if you heat a spoon on a flame and then insert it in a glass of water, the latter will warm up since Heat moves from the hot spoon to the cooler water.  Heat is a measure of energy and so its units are Joules (J).  The amount of Heat energy transferred is calculated by the formula Q=mcdT (mass x specific heat capacity x change in temperature)\n\nNow, if you are still studying basic Physics, you might come across definitions of Heat which state that it is the Energy driving the vibrations and movement of molecules.  In further Physics this will be called "Internal Energy", symbol 'U'.  In fact, the internal energy of a body can either be changed by giving or taking Heat (with a temperature difference) and/or by doing Work (that is why if you rub your hands together they warm up, despite being at the same temperature).\n\nTemperature is a measure of the degree of hotness of an object (not a measure of the amount of Heat in it!).  So, if an object has a temperature of 0 degree Celsius, this means that this object is as "hot" as pure melting ice.  In the same manner, a stone at a temperature of 100*C is as "hot" as steam above boiling water, and so on.  So, temperature is really a comparison.  There is an Absolute Temperature Scale devised by Kelvin in 1848, who found out that the lowest possible temperature is -273*C.  At this temperature all molecular movement is thought to stop and therefore there cannot exist a place colder than a place where there is no Internal Energy, and hence no heat!  Therefore this temperature is called Absolute Zero, and a temperature scale starting from this point, 0 K(elvin) (=-273*C), was set up. (e.g. 10*C = 10 + 273 = 283K).
505647
Heat is the kinetic energy of molecules; the faster the molecules move, the more heat.\n\nConvection heat transfer is where faster-moving molecules bump into slower-moving ones, transferring their energy so the slower ones speed up and the faster ones slow down, until they reach equilibrium.\n\nRadiation heat transfer is where electromagnetic radiation, such as infrared light or microwaves, excite the molecules in a substance, causing them to speed up and thus heat up.\n\nBecause convection heat transfer only works when molecules make physical contact, convection won't work across a vacuum.  That's how a Thermos works.\n\nRadiation can cross a vacuum, which is how we get heat from the sun.  Hot objects give off infrared radiation, which can be reflected back and contained; that's how aluminum wrap works.
112062
Heat conductivity? electrical?
278728
If it is for a science project, web sites may or nmay not have the answers....that is all part of a project, to figure it out for yourself, develop your own theories, hypothesis, etc.\n\nI will say it all depends on the temperature....beyond that you're on your own.
895004
Heat transfer is proportional to the temperature difference between the two objects, in this case the temperature difference between the walls of the vessel and the fluid in contact with the walls. Stirring brings colder fluid in contact with the hot wall of the vessel. With stirring, the temperature difference is greater between the hot wall of the vessel and the colder fluid, so heat transfer is more rapid.
686314
"Hot" is a very subjective word.  How "hot" is "hot"? 100 degrees C? 500 degrees C?\n\nWhen an object absorbs heat energy its temperature rises, there is no way around it.  But for a given quanity of heat energy (Q) absorbed, some materials will increase in temperature (delta T) more than others.\n\nThe term "Specific Heat" (c) releates the amount of energy needed to raise 1 gram of a substance 1 degree C.\n\nQ = m*c*(delta T)\nHeat enegry = mass of the object * the specific heat * change in temperature\n\nA higher specific heat means that the material will experience a relatively smaller change in temperature for a given amount of heat as compared to another material with a higher specific heat.\n\nUsually, metals tend to have somewhat low specific heats but there are some metals which are higher than others.\nFor instance,...\n-Iron has a specific heat of .444 J/g degree C\n-Copper has a specific heat of .385 J/g degree C\n-Lithium metal (not that this is a practical building material) has a specific heat of 3.582 J/g degree C\n-liquid water's c = 4.184 J/g degree C\n\nmore complete tables of specific heat can heasily be found on the internet.
1109243
Are you serious? Every possible temperature is in both Fahrenheit and Celsius whether it's hot or cold. Depends where you live if you use F or C.
188359
Water always evaporates no matter what is its temperature. Evaporation is NOT related to heat. Even at 1C it can evaporate. Water boils at 100C but evaporation occurs at every temperature.
601314
a.)\n\nIn a liquid or a gas, not all molecules have the same kinetic energy.  Temperature is just a measure of the average kinetic energy.  There is statistical range of kinetic energies.  Those molecules that have the higher kinetic energy may escape from the liquid into the gas phase.
341576
Besides the loss of heat due to the difference with room temperature, we can also check how water specific heat behaves with temperature. \nThe specific heat is the amount of heat required to change a unit mass of a substance by one degree in temperature. This specific heat increases with temperature, so this indicates us that water at a higher temperature needs a bit more energy to rise 1º than water at lower temperature.\n\nSo the answer is yes, it will take more time to rise from 90º to 100º because of two reasons:\n1- There is more loss of heat in the water at 90º than water at 10º.\n2- Specific heat is higher in water at 90º than water at 10º.
662480
The one that heats up faster AND to higher temperatures is soil.\n\nWater can not gain or lose heat as quickly as soil due to latent heat. Water absorbs heat until it reaches the next phase change (vaporization) in which the water changes state.
1003847
The study of heat and how it behaves.
956325
false - temperature is a measure of heat
776432
I am a HVAC trainer in the USA, and as such I have to explain the difference between energy (heat is a form of energy) and temperature. For the most part, my students do not posses any college background, and so I do my best to explain this in layman terms. There are chapters written on this subject, and to do it justice here …. well here goes.\n\nHeat is a form of energy, as is electricity, natural & propane gas, coil, gasoline, etc. Temperature is a measurement of how densely heat energy is packed into a substance. The more heat energy there is in a substance, the more vigorous the atoms and molecules will move. If the motion is vigorous enough, the substance can change its state and assume new characteristics (ice is different from liquid water, which is different from steam). \n\nThe temperature of a given amount of substance will increase as heat energy is added to that substance, and temperature will decrease as heat energy is taken (provided the substance does not change state). If a substance is at a temperature where it will change state, examples: ice~water @ 32deg F., …. and water~steam @ 212deg F. (at one atmosphere pressure), than the addition or subtraction of heat energy will cause the substance to change state, and the temperature will not change until the substance has finished changing state  “Sensible heat” is a form of energy that causes a change in temperature, “latent heat” energy causes a change in state.\n\n”Specific heat value” is the amount of heat energy it takes to rise or lower the temperature of one pound of a substance one degree F.  For instance, if we take one pound of ice at 0deg F., and put 1/2 BTU into that pound of ice, the temperature of that pound of ice will go up one degree F, thus .5 is the specific heat value of ice. If we continue to put energy into that ice, the temperature will go up one degree F. for every 1/2 BTU of energy we put in until it reaches 32deg F., at which time the ice will be at a temperature where it will melt if additional energy is put into it. We will have to put an additional 144 BTU’s to that one pound of ice at 32deg F., to change it into liquid water at 32deg F. \n\nOnce we have liquid water, we will have to put 1 BTU into that pound of water to raise the temperature 1deg F., thus 1.00 is the specific heat value of liquid water (please note: the specific heat value of liquid water changes slightly as the water’s temperature changes, but for most calculations, the constant “1.00” can be used). \n\nWhen the water reaches 212deg F. at one atmosphere (pressure at sea level), the water will once again be at a temperature where it can change state. As heat energy is added the liquid water, it will turn into steam. The amount of heat needed to change one pound of liquid water at 212deg F. into one pound of steam at 212deg F. is ….. ready ….. here it comes ….. 970 BTU’s …. That deserves a “wow”. \n\nThe reason I made such a big deal out of the 970 BTU’s is because it’s important that HVAC technicians and mechanics understand the concept that it takes a lot more energy to change the state of a substance than it does to change the temperature one degree Fahrenheit (or for that matter, one degree Celsius).
140386
Hot or cold is relative to your body temperature. Something less will feel blah, cool, or cold depending on how much less. Vice versa for hot. The 'starting point' for hot or cold can be different for each person, or even for the same person, like if you just worked out, everything will seem a little warmer for a while.
763107
Reactions can be classified as either exothermic or endothermic.  Exothermic reactions release energy, and cause the surroundings to increase in temperature.  Endothermic reactions absorb energy, and cause the temperature of the surroundings to decrease.
73667
Actually, heat is not an actual form of energy, but instead a measure of the excited energy in an object.\n\nTrying to measure the speed of heat is similar to trying to measure the speed of decibles (rather than the speed of sound)