At what position (angle and direction) should the solar panel be tilted to get maximum heat?
954514
umm just make them perpendicular to the sun.  wait till like 1 pm and put a pencil standing up on your panels and adjust the panel until there is no shadow. it is then perpendicular
343286
First off..  forget every air conditioner...  all of them.  Then forget your water heaters.  Then, forget almost all your appliances, including the 'fridge. As a matter of fact, for the size house you have, where you are, and what you use it for, forget photovoltaics altogether.  If I were you, knowing what little I know about your situation, I'd probably put up some solar hot water collectors, and maybe look into some wind power.  But it sounds like you are on the grid already...  why do you want solar?  If it's to save money, as they say on the sopranos... 'fuhgedabboutit!!!'  A grid-tied panel or two might give you a warm fuzzy feeling about helping green up the earth or something.. but the reality is that your payoff time is about 20 years on that..  and likely never given your location.  Solar panels get very inefficient when they get hot.. and hot is what you have.  Solar hot water will help some, depending on how much you use.  Go to homepower.org and educate yourself on the reality.  For remote locations it makes sense, but if you already have city power there, it usually doesn't.  Good luck, and be smart.
409423
You have to specify the energy migration profile. Either adiabatic (zero energy transfer) or iso-volumetric (a lot of energy entering the system) or something in between.\n\nAlso, you have to specify the thermal units (Celsius/Fahrenheit/Kelvin/Rankin).
592048
An "inversed angle" cup like the one you suggest, would certainly be more stable, but I think that the point here is the tilting angle you should give the cup in order for fluid to run down to your mouth.\nNotice that in an "inversed angle" cup, you should tilt it much more to drink, making it a bit more uncomfortable.\nThe limit should be a straight cup, of which there are lots in the market (mugs).
763822
Divide the right angle into three equal parts, or three 30-degree angles.\n\nSounds like homework to me (which, hey, I'm cool with!), as if you owned this parcel this is NOT the way you'd want to divide it for real -- you wouldn't want three neighbors all bunched up like that at the confluence of the former right angle.\n\n.
129713
MeghnarMajhi is right.\n\nTemperature <==> Heat
1154945
Space heaters are not supposed to be installed anywhere. They are suppose to be placed on the ground with a 4' clearance in every direction. Then turn it on.
536681
for this if you are looking for the angle you dont need the lengths of the sides.  A sail would be a right triangle therefore the largest angle would be 90 degrees.\nIf you are looking for the largest SIDE then you should use\nthe Pythagorean Theorem.  a^2 + b^2 = c^2
263946
Have each page work on the same princable as the bi-metallic thermometer.  Try to find two materials the expand differently than eachother because of heat, or you could use humidity to expand one material more than the other. You could probably find some material that contracts (or expands) when an electrical current passes through it. place a strip of this along the top and bottom of each page. Thats all i can think of right now.\nCool question by the way.
1040483
runs with solar energy
759412
Even if the earth wasn't tilted at all, it would still be colder at the poles and hotter at the equator.  Imagine that you want to find a place to lay down solar power panels on the ground.  You'll get more solar energy if you picked a spot at the equator than at the poles, because one gets the maximum solar energy influx when the sun is directly overhead, and minimum when it's at the horizon.  Having the earth tilted merely exaggerates this effect, and causes seasonal changes in solar influx for different parts of the world, but is not the primary cause of "too cold" and "too hot" being in some places.  The primary cause is that the earth is round, so that some places just get more solar energy than others.
744400
Always more than 180 degrees\n\nTh
1187482
Kilowatt\nCost depends on method of generation and location
376549
Get a higher rating transistor and provide a generous heat sink. The general rule of thumb is that you can touch the heat sink and it should just feel warm and not burn you.
678334
This is a bit complicated but you might try this....\n\nStart with a centralized heat source, preferably electrical, so it should remain fairly constant.  You will need three thermometers, each to be held in place by their own stands.  Place a block or bar of metal so that it does not quite touch the heat source, and in contact with its thermometer at the far end.  Place a wooden bowl with water (a metal or glass container would taint your study ) near the heat source with its thermometer just in the water.  Place your last thermometer the same distance from the heat source, thus testing the heat conductivity of air.  If you had access to more thermometers and stands, you could place them at various points in a line from the heat source.  You will notice that the last thermometer will by far have the lowest readings.
94072
It depends on how hot you want your water. If you want only moderately heated water, suitable for bathing, you can use a box covered with glass that has a long winding pipe inside it. The pipe should be a small diameter and laid out flat on the bottom of the box with as many turns in it as possible to increas the length. This can go into a reservoir, like a hot water tank, and to make it more sophisticated you can put a circulating pump on the tank that constantly circulates the water through the heating panel. This is how commercial solar water heaters are made, with some sophisticated controls added. \n\nIf you want to boil your water using solar power this can be done with a parabolic mirror that focuses sunlight onto your cooking pot. These can be made from small pieces of mirror laid in a parabolic form (shaped like a satelitte dish) and cemented with plain grout. I have seen these used in some areas and they are quite effective. \n\nOne simple method that I use when camping: Lay a black colored bag of water on the ground or hang it in the sun and wait till it is warm enough for a shower.
263134
Place the sand on a piece of paper, then place the magnet underneath, then the tilt the paper, that way the iron will stay where it is but won't just stick to the magnet!!