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A flame uses oxygen in order to burn. By placing a jar over it, it limits the oxygen causing the flame to burn out. That is one reason house fires are dangerous, because fire burn oxygen and we need oxygen to breathe
the candle light turns off when the cup is placed over the candle and water rushes in due to atmospheric pressure . when cup is placed on the candle all the air goes out and the glass lifts up due to the atmospheric pressure releases from outside of the cup as there is no air inside to balance the pressure exerted out of the cup . thus when the glass lifts up and the water gets into the cup .
wax poured into a special glass
magifing glass
Lighted magnifying glasses are very common. You can purchase one at stores like Sears, Target, Ebay, Amazon, Bed Bath and Beyond, See it Bigger, and Overstock.
A flame uses oxygen in order to burn. By placing a jar over it, it limits the oxygen causing the flame to burn out. That is one reason house fires are dangerous, because fire burn oxygen and we need oxygen to breathe
Light the candle and put a glass jar over it. Watch the flame of the candle closely. When the flame goes out, this means that the flame must have oxygen to burn the candle. This is how candles use oxygen.
The main cause is that the glass is covering warmer air, heated by the flame, in the beginning. When the flame extinguishes, the air inside the glass starts to cool. Universal Gas Law: PV/T = a constant. Assume P = a constant too (the atmosphere pressure has changed little). Since the air temperature drops, the volume has to shrink too. The water rises up the glass a little to equalize the pressure.
The burning flame on a candle needs three things to continue burning: 1) fuel, which it gets from the wick 2) heat, which comes from lighting the candle 3) oxygen Without any one or more of these three things, the candle will no longer continue to burn. In the case where a candle is covered with a glass, the candle quickly uses up the oxygen inside the glass. once all of the oxygen is gone, the flame will burn out.
place 2-3 plants with dense leaves in a closed glass chamber with a lighted candle. the candle will light longer than wothout plants
The concentration of oxygen in the air in the beaker becomes insufficient for the flame to carry on burning, or the carbon dioxide produced is trapped in the beaker, and the increased concentration causes the flame to be extinguished.
a flame needs oxygen to burn so if you put a lit candle in a closed container (like a jar) the oxygen will continue to fuel the fire until there is no more oxygen and the candle will go out
Glass candle holders are generally the easiest to clean. Unlike metal, they can be placed in the microwave for 30 seconds to soften the wax.
the candle light turns off when the cup is placed over the candle and water rushes in due to atmospheric pressure . when cup is placed on the candle all the air goes out and the glass lifts up due to the atmospheric pressure releases from outside of the cup as there is no air inside to balance the pressure exerted out of the cup . thus when the glass lifts up and the water gets into the cup .
Incomplete combustion causes carbon dioxide to leave carbon behind on the glass
The candle burning in the open will burn longer, because it has easy access to oxygen to sustain the reaction. The flame of the candle burning under the jar will go out quickly, since it will use up its available oxygen faster than the oxygen can be replenished. Even if the jar is open at the bottom, the heat, carbon monoxide, and carbon dioxide produced by the flame will prevent sufficient oxygen from getting to the flame to feed it.
It is an oil lamp with a glass chimney designed to protect the flame in high winds