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Not reversable, If you put a burned candle in a cold dark place, it does not become whole again.
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∙ 12y ago
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How could you prove that grinding a bar of iron into a powder is not a chemical change?
You can prove that isnt a chemical change because it is just a change of appearance which is considered a physical change.
What methods do scientist use to determine if it is a physical or chemical change?
For a chemical change they analyze the new substances to prove there has been a change in the chemical composition. I am not sure about physical though.
How do I prove that the varying temperature is an error in my lab report?
More Info: In a lab to prove that the temperature of matter can not change if it is going through a state change, data for the state change from solid to liquid has a small variation (the temp probe read melted water instead of the ice). How do I academically explain/ justify this in my lab write up?
How do you prove there is glucose in a sample?
You can prove there is glucose in a sample by using Benedict's Solution. Heat up the sample, and add the Benedict's Solution. Assuming the solution is clear, if glucose is present it will change colour to red, or yellow, or green. If not, it will stay clear.
Why is it important to develop a scientific hypothesis that is testable?
It is important to be able to test the hypothesis because testing your hypothesis is how you prove or disprove your theories. If it is disproved then you can change your hypothesis.
What are the steps to prove that a burning of a candle is physical as well as a chemical change?
1. Melting of the candle is a physical change. 2. Burning and thermal decomposition are chemical changes.
How can you prove that when burning candle new materials are being made?
by testing it but i think that soot and carbon dioxide and melted wax is made...
What experiment could you do to prove that oxygen is needed for burnig?
simply cover a burning candle with a glass to cut off the air, then the candle will burn out
How do you prove conservation of energy If you read Feynman's Lectures ch 4 what is meant by the whole reversible machine experiment?
a reversible machine is a machine which is in itself a perpetual motion machine I am guessing.
How can we prove that carbon dioxide is present in the air?
A candle dye out in carbon dioxide.
How do you prove that candles use oxygen?
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.
How would you prove a plant produces oxygen?
place 2-3 plants with dense leaves in a closed glass chamber with a lighted candle. the candle will light longer than wothout plants
How can show that air support burning?
If you put an enclosed container over a candle, after a few minutes or seconds, the flame will go out. This is because when the candle burns, it releases carbon. The air around the candle contains oxygen. The carbon and oxygen combine forming carbon dioxide. When there is no more oxygen to combine with, the flame goes out.
Copyright on candle holders?
Unless you intend to register the candle holder as a sculpture or other work of art, a new and unique type of candle holder would probably be better served with a patent. However, patent applications are fairly elaborate, and you will need to prove that your candle holder is indeed completely different from any that came before it.
How could you prove that grinding a bar of iron into a powder is not a chemical change?
You can prove that isnt a chemical change because it is just a change of appearance which is considered a physical change.
How can a theory change?
your prove or disprove it.
Does wax exist in all 3 states of matter?
the easy answer is yes. Solid and liquid forms you can clearly see. Since the boiling point of most waxes is under 1000 degrees C and the temp of most candle flames is well over 1000, it is vaporized (boiled). There are experiments on the web that prove that it is the vapor that is burning, not the liquid wax absorbed up the wick.
