Is heat the result of the absense of cold or, is cold the result of the absence of heat?
98637
Cold is the absence of heat. Hate is the absence of love. Dark is the absence of light. You can quote me on that.
930423
All energy eventually ends up as heat.  It's a consequence of the second law of thermodynamics
251506
of your choices, the one "no heat engine can be 100% efficient" is most correct, isn't it? But doesn't it primarily derive from second law, and the third law is that "absolute zero" is unattainable? [though in a tiny space, the University of Florida is testing a theory that a random tiny state would be possible, at "no motion", hence, absolute zero]
727069
exothermic means energy is given off, so it wud have a - sign\n\nendothermic means energy is absorbed and wud hav a + sign\n\nhope this helps!!
1117740
since the heat evolced is dissipated in 100 ml in the first case (by 2 g of NaOH) and in 200 ml of water in the second case (by 4 g of NaOH) the net change in the temperature of water remains same. hence 'a' is the correct answer\n answer : 'a'
598324
Heat is a form of energy. \nTemperature is a measurement of the state of heat-energy in a certain body.
462388
A reaction which gives out heat is known as 'exothermic'.\n\nhttp://en.wikipedia.org/wiki/Exothermic\nhttp://en.wikipedia.org/wiki/Exothermic_reaction\n\nA reaction which seems to absorb heat is known as 'Endothermic'\n\nhttp://en.wikipedia.org/wiki/Endothermic\nhttp://en.wikipedia.org/wiki/Endothermic_reaction
605145
no...it cant get colder than absolute zero....thats why its called absolute....molecules dont move forward or backward ....you should think of them as energy particles....electrons dont really move around a nucleus either....dont think of them as planets around the sun they are more like energy fields.  the more negative the charge the more "electrons"....if there is any movement....even if it were possible to move backwards it would be warmer....movement causes friction and, therefore, heat.  it you cant get less than nothing.
331795
your chemistry teacher probably wanted to know the + or - sign, then it should be + because when ice melts, it absorb heat to overcome the van der walls force between its molecules and ice also has high hydrogen bond between its molecules to overcomed. so, ice needs extra energy (heat) and the sign is positive. \nif he/she is asking bout the other sign, then it is the melting part. if heat is released, u can feel the heat on the surface of the material but if heat is absorbed, u can feel the coldness on its surface. if you hold ice in ur hand, it will melt more faster coz the ice absorbs heat from ur hand to overcome its force between bonds ( like i explain above)
621743
We cannot make a substance cold. \n\nWe can remove the heat from one place to another.\n\n  What is the difference between ice and water?\n\nFrom ice we have removed heat. The water is water because we have not removed heat from it. \n\nWe should not say ice is cold when compared to water, because we have not made it cold but we have removed heat from it.\n\nSimilarly when we want some hot coffee, we should ask, I want a coffee in which heat is added because we cannot make coffee hot.\n\nThank you.
184337
You should re-ask.  Do you mean strength or heat or both?  We also produce electricity and build chemicals that store energy.  You need to define output better.
741385
Okay: it's simple. Your blood chills when you suddenly get cold, right? Well, you get cold whenever your body temperature drops. Your body temperature drops during certain emotional activity in your brain. One emotion: fright. There you go! Or, i could answer like a complete jackass by saying a ghost is trying to possess you, but I'm not going to.   :)
73795
Nothing.  Temperature is actually the kinetic energy of   countless atoms in a given space.  At 0 kelvin the atoms would stop moving.
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.
96040
The phrasing is wierd, shouldn't there be a from between flow and the?\n\nIf two substances have different _temperatures_, heat will flow [from] the hotter [substance] to the colder [substance].\n\nThis is because heat, at the molecular level, is related to how fast molecules are moving. When a substance whose molecules are moving faster comes in contact with an object that's moving slower, the faster molecules will collide with the slower molecules of the second object, slowing down the faster molecules while speeding up the slower ones. Thus, heat (average kinetic energy of a substance) is transferred from the hotter substance to the colder one.
26224
I love the cold. In the cold it's simpler to just put on the heat when your cold. but its harder to chill the heat
853193
well, I can speak for "cold"  \n\nIt comes from the root of the word, which is actually "cold condition."\n\nOne catches a "cold condition" rather than "catches cold condition"