I need help fixing my solar cooker, PLEASE?
1) The parabolic shape of the foil makes that all the sunlight gets concentrated in one spotTry to find this spot, and place your hot dog there with a stick (or something like that) You really have to be preciseAnyway, if your cooker is symmetric, then you should place your hot dog right in the middle, and probably 5-10 inches (13-25 cm) above the foil2) Yes, but the household-foil you are using (i assume) is aluminium foilThis just means that it's made of aluminium, and quite perfect for a cooker like thisIt's also revered to as tin foil or silver foil, but that's actually incorrectMake sure the foil has minimum crumples3) add a second solar cooker, adding it to the firstYou can make a cross shapeYou can also place it along side the first cooker, and tilting it, placing the focal point in the same spot as the first cookerYou can also try making a paraboloid, but that could be kind of hard4) I always stick a fork in it, letting it stick in there for a few seconds, take it out and feel how hot the fork is (with the back of your hand, or your lips (dont burn them))If it's hot, then it's readyBe careful, the spot where the sunlight is concentrated in (the focal point) is very very hot.
The capacitance of a parallel plate capacitor is - C Aee'/d where - A is the area of the plates e' permittivity of free space 8.854F/m e relative permittivity of the dielectric d separation between the plates You can evaluate C in this equation using your calculator with the information provided in the question.
