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Hard Scale(Scale)

- Forms in steam boiler

-Has the appearance of a white and brown concentration

-smooth texture

Soft Scale(Sludge)

-Forms in the hot water heaters

-Appears as a thick ,brown or black sludge

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12y ago

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What is the difference between absolute temperature scale and kelvin scale urgent I am convinced that there is a difference?

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The workers had to wade through thick sludge to clear the clogged drain.