why thermometres are made up of glass and not plastic?
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Themometres are made up of glass.Because -
We know that Glass is transparent.If glass is transparent we can see the expansion of mercury and know the value of temperature.But, Plastic is opaque.
But, Modern thermometres are made up of plastic also.
We know that Glass is transparent.If glass is transparent we can see the expansion of mercury and know the value of temperature.But, Plastic is opaque.
But, Modern thermometres are made up of plastic also.
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