How To Prove That Hot Air Rises..?
412365
Thats simple! Boil some water
836852
the pressure of the air inside the thermometer pushes it up.
1159227
As a general rule, warm air rises and cool air sinks\nit expands and becomes lighter as the molecules of air move farther apart
210118
Hot and cold air converging over an area of low presure.
911974
Go with a line graph, that way you can also find out (or estimate) temperatures at times when you didnt measure it.
114441
Well, the temperature is going to increase by one degree every three days.  You will need to do the math from there.
61711
Hot air is less dense than cold air so it rises 9that's why upstairs in a house is usually warmer than downstairs).  By filling a bag with hot air you can make the bag (balloon) rise up.
173424
see it this way.....we havnt seen God so y we should believe Him, but look at this way too.....we havnt seen air, but we say that air exists coz we breath. also, no one has seen electricity yet we believe that there is electricity coz we r feeling cool under our fan, or we r able to read at night since the bulb of our room is glowing.So we prove the existence of air and electricity by feeling them. similarly, we should feel that the system of this universe is so well organised that only a power like God can do this.\nif u think that science hasnt prove the existence of God then science is also unable to deny the existence of God.\na simple question?.....u came from ur parents , ur parents come from ur grandparents....they how first man came on earth?.......science has given the theory of evolution and origin of life to solve this question,but this theory has the greatest disadvantage that it hasnt been proved yet.\nanother simple point.if science is unable to disprove the existence but can do so in 'some more years' , then u should believe in God till those 'some more years', then we will see further..\nif u want to contact me further ....send me mail at religion_zaeem@rediffmail.com....
412631
A balloon filled with hot air rises because of the force of buoyancy. That means the density of air inside is lesser than the surrounding air (because hot air expands thus density decreases) and thus there is an upthrust acting on the balloon. Now, if the surrounding air is at the same temperature then its density is same as that inside the balloon and so the balloon will not rise. But the balloon will not not remain at the same point. it will fall because of the weight of the rubber in it.\n    In case of exploration on other planets, firstly other planets have very low density of air in the atmosphere (most of them do not have any air) and secondly even then is one wants to use this one has to heat up the balloon to a temperature for which the density decreass lower than the surrounding. Hope this answers your question.
776045
When air is warmed up, its molecules move faster and faster and as a result they move further from each other.  They still have the same mass, but they now occupy a larger volume.  This means that its density is smaller.\nThe opposite when air is cooled off.  The molecules slow down, get closer together, occupy a smaller volume and therefore its density is bigger.\n\nWhen air is warmed up, it goes up.  Once it's up there, is cools off and goes back down.  Near the heated surface the air gets warmed up again, goes up, cools down, goes back down, and again and again.\nThat's called a convection cell.
546333
It hasn't been exposed to air yet. It takes air to harden.
266721
The heat source was hot enough to make the rise of the temperature from 32 to 145 F. The rise is 113 F obviously .\nIt took 4 x 60 minutes. So the average increase of the temperature is\n(113 F)/(240 minutes) = 0.47 F/min.
1111346
The most effective way is with one or more large fans blowing in, on the lowest level of the house, and the windows on the upper level (if there is one) open. By forcing air into the home, you create a positive pressure, and that, along with the fact that hot air rises, moves the air through the home.\n\nIf you ever watch the fire department removing smoke from a building, you will see them using the positive pressure ventilation method
350704
air resistance.\n\n Do the experiment yourself- if at school- get a teacher to make up a sealed tube, suck out the air (less difficult than it sounds- i remember doing something like this) and then invert it. its very strange.
757999
Hot smokey air rises, cleaner air with more oxygen is lower.  Maybe just enough to get out.
320649
Even in close rooms there is air convection, that is, warm air moves naturally from the floor to the ceiling. You may not feel it (it's a tiny flow), but it's there. Don't be scared, it's a natural thing, no ghost is involved.
956325
false - temperature is a measure of heat