Graphite
powder is used in some machines to reduce friction. Ball bearing coverts
sliding friction into rolling friction.
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Q1
Graphite powder is used in machines to
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Q2
Graphite powder is used in machines to _________.
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Q3
Graphite powder is used in machines to_______
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Q4
Graphite is used as a lubricant in machines because it has a very high melting point and also it :
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Q5
If the standard molar enthalpy change for combustion of graphite powder is −2.48×102kJmol−1. the amount of heat generated on combustion of 1g of graphite powder in kJ is
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