Glass bending procedure without dents
This is a delicate procedure that has only been done by a few people. You can watch some videos online of how to do it.
A watch glass hasn't a symbol.
clasification of cleaning glass?
because glass is transparent
A watch glass is a very shallow, round piece of glass that is curved. It is usually not used as a container, but as a cover for a beaker.
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A watchglass can be used as a beaker cover, but you can also place small amounts of chemicals on it and then heat it (for example, to evaporate some water from a wet chemical).From Wikipedia:A watch glass is a circular, slightly concave piece of glass used in chemistry as a surface to evaporate a liquid, or as a cover for a beaker. The latter use is generally applied to prevent dust or other particles entering the beaker; the watch glass does not completely seal the beaker, and so gas exchanges still occur. When used as an evaporation surface, a watch glass allows closer observation of precipitates or crystallisation, and can be placed on a surface of contrasting colour to improve the visibility overall. Watch glasses are so named because they are identical to the glass used for the front of old-fashioned pocket watches. In reference to this, large watch glasses are occasionally known as clock glasses.See the Related Questions and Web Links to the left for a picture of watch glass and more information about other laboratory apparatus.
I would place the watch glass on a balance, and then zero out the balance with the watch glass placed in the tray. After the balance is balanced with the watch glass, I would move the weights to represent an added five grams. I would then slowly add calcium chloride to the watch glass until the balance rebalances or zeroes out.
The watch glass may contain small amounts of solid or liquid samples.
i think a test tube
Watch munna bhai
Use a magnet.