What law of thermodynamics explains the fact that we must eat n order 2 gain energy 2 perform functions of lfe
816304
the second law of thermodynamics. it states that a body cannot extract energy from a lower energy body to a higher energy body, in a simplistic sense. the body cannot extract energy from a depleted energy reserve to do work, the physical effects of which are usually of higher energy levels.
40675
The source of energy is food. Food is digested, giving you energy.
249841
Work equals the vectors of energy.
755161
The heat energy Q  that must be absorbed by a mass m with specific heat c raises the temperature of the mass from temperature T1 to temperature T2: \n\nQ = mc(T2-T1)\n\nThis assumes there are no other energy losses or gains to the system.
827265
If you're human, you do.  The food you eat is broken down to make the energy you need to live.  The energy is measured in calories.
282436
According to second and 3rd law of thermodynamics,\nEfficiency is not greater then 1-L/H where L is temperature of air and H is temperature of engine both in Kelvin. ok H is near to 700 Kelvin and L is near to 300 Kelvin, so as a nature rule efficiency can not be more than 1-3/7 = 4/7.\nwhich is more then 50 percent.\n\nIn the real application it is even less and is near to 30 percent at most, \n\nScientists are trying to increase the efficiency, but they know that the limit is about 50 percent.\n\nDue to 3rd law of thermodynamics, in order to reach this limit all processes in the automobile must be reversible,\nSome way to get near to reversible processes in engine is to make the processes (spatially the ignition) very slow.\nBut how to make enough power with slow burning process...
1117763
The second law states that each time energy is used, the quality of that energy is decreased.\nSo the technically the energy is there, but it is in a form that cannot be utilised (just yet).
519547
Most likely Energy in Joules. We need a context though.
351098
This is the "if things are always meant to go to greater entropy, how can random molecumels reverse entropy and become organized" argument, right?  Ok-If you really thought that nothing could go from a state of disorganization to a state of organization, THEN you would have a good reason not to clean your room, stack the dishes neatly, build a house from a pile of bricks, etc etc.  Obviously, things can go from a state of disorganization to a state of organization-it happens constantly, all the time.  First, the law is involved in closed systems, where there is a set amount of energy-Clearly, Earth gets a whole whopping amount of energy every day, or everything WOULD fall apart.  But even in a local sense, life and evolution DO increase entropy, just like building a house from a pile of bricks does.  The equation is one of energy usage as well as organization.  The energy that turns into waste heat (maximum entropy) in the process of building a house, or building an animal, is greater than the organization that results from that energy.  So, you have to generate a lot of waste heat to get a little organization, and even in this small system you have increased entropy-Surely you can feel it that the energy to do the dishes is *way* more than the resultant organized dishes...  Evolution has used up an enormous amount of energy, and increased entropy-and the only way it can work is that it gets a constant large infusion of new energy all the time, from the sun (or geothermal processes in the case of deep sea extremophiles)- In a very real sense, life is ac extremely wasteful proposition, like the worst chronic shoppaholic-but its ok for the shopaholic, if they are given a billion dollars a day to do it.
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Second law of thermodynamics:\n\nBecause of the 2nd law, you can put a pig into a machine and get\nsausage, but you can't put sausage into the machine and get the pig back."
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First Law of Thermodynamics: Energy can be changed from one form to another, but it cannot be created or destroyed. The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another. Click here for another page (developed by Dr. John Pratte, Clayton State Univ., GA) covering thermodynamics.\n\nok now to answer your question:\nWork=PV=nRT\nWork=(2moles)(8.32)(106-21)\nWork=1414.4J
956158
Law of Conservation of Energy states\n\nEnergy and matter cannot be created or destroyed, only transfered\n\nAt the big bang, the temperature was 100 billion degrees C. So hot that everything was energy.\n\nThe big bang propelled out all this energy where some was transfered into matter.\n\nThe tempterature of the universe is now 5K but still the total energy and matter now is equal to the total energy and matter at the big bang
962900
The main mechanism of energy production in the body is through the formation and oxidation of adenosine triphosphate, ATP.  Cells convert carbohydrates (which we eat) into ATP, and then oxidize the molecules later to access the energy in their chemical bonds.
462106
Its called "law of conservation of Energy".. \nYou can covert matter of mass M into energy  (and energy will be MC^2).. but you can not create either.\n\nEnergy will chenge from one form to another form like heat, work, pressure...etc. All these are one way or the other  form of energy.\n\nFundamental concepts of classical physics will give you much better idea about this concept.Try it!
390030
heat mainly - the energy is wasted in the form of heat instead of transferable energy
25670
Some systems actually cool as they deliver power.  A rubber band is most common example I can think of.  If you expend energy to stretch a rubber band, it actually heats up, but it cools slightly as it contracts, which could potentially power some small device like a toy car.  Why this occurs is a little complicated, but the exact same principle of entropic cooling is used to achieve the lowest temperatures currently possible.\n\n***Response to first answerer***\nWhat basic law of motion are you talking about?  The second law of thermodynamics? Because that deals with entropic differences, and doesn't apply. The "laws of motion" aren't even relevant to this thermodynamics question.  \n\nI used the example of a rubber band because it is a clean example of entropic cooling, but in fact ANY  heat engine will result in a decrease in thermal energy of the system. It's true that there is some heat produced from friction in the engine, but on a whole more MORE heat flows into the engine than flows out.  The average temperature of the system decreases. That's why we can use heat engines to power things.
1011719
I sure hope you are either joking or 12 years old. The second law of thermodynamics does Not say everything goes from order to disorder. What it says is that in a closed system the total amount of entropy (disorder) tends to increase.\n\nyou can think of entropy as being like garbage, as long as you have a place to toss it, you can increase local order, of course it takes work to toss out the garbage but in our case we have the sun which does this work for us.\n\nIn the earths case it is simple physics, for every photon we receive from the sun, we radiate about 20 photons. The earth maintains a constant temperature because the wavelength of the light from the sun is much shorter (higher energy per photon) than the light ( mostly infared) given off by the earth. So for every photon that we receive from the sun the fact we give off 20 photons, provides a net gain of about 19 units of order. Think again as the 19 net photons given off as a loss of entropy. \n\nBasically if the creationist argument were correct you could never clean your house and it would continue to get more cluttered, but we throw out the garbage, and that is what the sun allows the earth to do.\n\nReally, Most of us learned this physics in high school. When creationists make these bogus arguments they are merely making themselves look like fools. They do not help their cause at all.