Why is the calorimeter constructed from two aluminum can?
492383
For a calorimeter to give an accurate reading, it needs to retain all the heat released, and two aluminium cans, one inside the other, retain heat the same way a vacuum flask does.   Being shiny, they don't radiate much heat, because poor absorbers are also poor emitters.   And the air space between them impedes conduction of heat.   Air is a very poor heat conductor.
744069
The coefficient of thermal expansion for aluminum is 23*10^-6/ºK.  The expansion is ∆L/L, so ∆L/L = 23*10^-6*∆T\n∆Q = m*cp*∆T, where cp is the specific heat of aluminum = .897*J/(gr*ºK)\n\n∆T = 14500/(350*.897)\n\nTherefore ∆L = 20*23*10^-6*14500/(350*.897) cm
570003
about the two are mentioned, both are found in the body, but the excess is dangerous with less amount of magnesium than aluminum. have you mentioned other?
709208
You can find international suppliers at the reference.  It appears that many materials are used including plastic and aluminum.
855413
Latent heat of fusion of ice is only 80 calories/gm whereas the latent heat of vaporisation of water is as high s 536 cal/gm.Therefore C is correct
760371
1. The ratio of h to r is not dependent on the can being made of aluminium. The surface area is just a concept - it cannot be aluminium.\n\n2. Is a cube (assuming that no aluminium is used in forming the edges) \n\n3. You need to do this bit.\n\nFurther Investigation  - you need to do this bit , it looks as though if you limit your investigation to regular prisms that will be O.K., investigating cones would be impressive. \n\nIn so far as the wastage is concerned. If you find out what the area+wastage is for the optimally sized circular cylinders and compare with optimally sized hexagonal prisms then this may be sufficient?
164495
this experiment is called calorimetry
405523
If the spheres are of same volume, their apparent loss of mass will be the same.\n\nIf the spheres are of same mass, Aluminium sphere's apparent loss of mass will be more.
1001648
Read at http://en.wikipedia.org/wiki/Aluminium
540767
The conductivity of aluminium is required. A detailed solution of the Heat equation (A pde) is necessary to get an accurate answer. In the absence of any simplifying assumptions, this problem is not trivial
475765
oh, wow, this is a physics question.\n\nto start, we remember E = mc^2\nthe problem gives 4 grams matter and 2 grams antimatter.\nmy solution would be that 2 grams of matter and 2 grams of antimatter annihilate to produce 4c^2 (2 + 2 = 4) energy.\nthe excess 2 grams of matter remains unaffected.\nthe answer is D.
105324
The question is either incomlete or it doesn´t make sense. Are you looking for the atomic mass, density or somethig else.\nAs it is, the best answer to your question would be: "depends on how much aluminum".
1115500
they send thousands of tons of old PCs overseas and nothing is done with that material. if you want to get into something worth while get into aluminum. the price of that is real high right now.
823151
I don't really understand what your question is.  In the first place, heat always flows from a warmer object to a cooler one.  That maximizes the number of possible arrangements of energy quanta, leading to an increased entropy.
756921
the answer is\n2Al + N2 ----> 2AlN
799172
Two tin cans, and some string!
643566
In the Environmental Lab, we used the Parr Oxygen Bomb Calorimeter to measure the change of heat or capacity of heat for different substances.  What I basically mean is that we put the substance into a reaction vessel and then into the reaction container(bomb).  The bomb is pressurized,  filled with Oxygen, ignited and the data from the reaction is extrapolated to give us the Caloric Value for the substance.  \n\nWe took in Hazardous Waste for incineration in an industrial Kiln.  It was important to know the Caloric Value for these substances as it would determine how much other fuel (Usually natural gas) we would have to use to maintain the optimum temperature for the Kiln to operate.