does the number of caloreis in food change (increasing or decreasing) ofter cooking it?
604787
Sure a lot of things lose calories when cooked. In fact that's how they determine what the number of calories are. they burn the item up and measure the amount of heat that it creates and that gives you the number of calories in it. As an example. If you take a whole chicken and cut it up and put it on a grill it flames and spits and a huge amount of heat comes off of it. that is a percentage of the fat burning off so yes, it will reduce the calories because it is burnt off.\n\nThe amount of food energy in a particular food could be measured by completely burning the dried food in a bomb calorimeter, a method known as direct calorimetry
827524
Easier compared to one with a higher heat capacity:\n\nH/(m*Cp) = (delta T), where m is the mass of the object, H is the heat that must be added (or removed) to raise (or lower) its temperature, delta T is its change in temperature, and Cp is its heat capacity. From the above formula, you can see that larger values of Cp result in small temp. changes, for the same heat amount.
838178
The answer should be A.\n\nAverage kinetic energy of a substance is related to the speed of the particles moving in it and the temperature of the substance.\n\nAs the particles in the a substance moves faster, the average kinetic energy of the substance increases.  So does the temperature.\n\nWhen a substance changes phase, the temperature will remain constant.  This means that the average kinetic energy is also constant during this process.  Hence, B is wrong.\n\nWhen thermal energy is being transferred out of the substance, one could understand it as taking out some particles out of the substance.  So what is changed here?  I would think that the total kinetic energy is being changed, since some particles have been taken away.  But the taking away of the particles would not affect the speed of the remaining particles.  The AVERAGE kinetic energy should remain unchanged.  Hence, C is also wrong.
622985
yes it is 294cal... first you go 150 - 10 degrees to find out how much the temperature change was  (140).  multiply 0.21 cal by 10 g to find out how many cal is given off for each C if the aluminum is 10 g (2.1), and then you take that number and times it by the temperature change (140 x 2.1). and voila. you get 294 cal. which is one of the choices :)
673308
sucking on pasta is a chemical change, boiling it in water is a purely physical change though...
1118780
Your question is very open.\n\nheat equations very general can be:\napplied heat = specific heat x mass x increase of temperature\napplied heat = heat capacity x increase of temperature\napplied heat = mass x specific melt heat\napplied heat = mass x specific evaporation heat (at boiling point)\nHeat from a supply = power x time.\nCombinations and others are possible.\n\nwave equation can be x = A sin( 2pi t/T)\nThere are more possibilities.
925329
You must approach this question with an understanding of energy conservation. Change in Energy = mass*heat capacity*change in temperature, where heat capacity = 1.00 for pure water. By evaluating your conditions with the above definition of thermal energy, it will show that you must supply 2 calories of heat to the system.\n\nIf you were to add another substance to the original system. You would once again approach the problem using energy conservation. The energy of a hot liquid (mass1*heat capacity*change in temperature) + the energy of a cold liquid (mass2*heat capacity*change in temperature) = mass(1+2)*heat capacity*change in temperature.\n\n-Christopher
125327
I'll bet around 150+ we start to cook, although we're not really flamable. Im sure it could be extrapolated by how low you can cook a chicken in the oven at lowest temp.\n\nSkin doesnt melt it chars. We're not flamable, but we certainly can burn. Burning starts to really occur once the area has completely been depleted of water.\n\nDont confuse burns with flamable people...
154370
cutting\nslicing\ndicing\nmixing\nchopping\nwhipping\ngrating\nshredding\nkneading\ncombining\npureing\nblending\n\nto name a few\n\nanything that changes the food is "processing."
1158674
Depends upon how good you can cook.
1161882
I assume DH is delta H ? If so - it's the change in heat. Final minus initial.
766015
I would also believe it depends on the way you cook your turkey as well. there are so many variations now, baking, roasting, frying, etc. Each one of them lends itself to a different texture and look to the end product! It may be a combination of the two.
620603
no.  you should be more concerned with the total # of calories you are consuming and at what time.
1150672
They literally burn the food in a special device and measure the heat energy given off.  The original heat energy used to burn the food sample is subtracted and the difference is the caloric content of the food.
21856
There is not direct relationship.  I suppose if you intake too many calories, then your BMI will rise to an unsafe level.  And what do you mean by the "number of calories?"  In the universe?  In a McRib sandwich?  In me?  Haha, just kidding with you, but this question really does not make an sense.
833158
1) increases\n2) decreases\n3) remains the same \n4) increases\n5) decreases\n6) increases
461981
Hot Sauce was number '3' for a long time but im not sure if he changed it.  He probably kept the number so.. 3