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Polythene RodYou can usually make it by friction. There are two types of electric charge POSITIVE and NEGATIVE. If you take a piece of polythene and rub it with a duster, the polythene becomes charged negatively. The duster becomes positively charged. If a rod of cellulose acetate is rubbed the charge on it is positive.

Most electric motors operate through the interaction between themotor's magnetic field and electric current in a wire winding to generate force in the form of rotation of a shaft

In typical laboratory use they are filled with a dry dessicant material such as KOH

also called Norgessalpeter

In order to protect your hands from acid

A wire gauze is a sheet of thin metal that has net-like patterns or a wire mesh

Ethanol is a volatile

a top-grade chemical compound for industrial and manufacturing use

Its formula is (NH4)2SO4

Without proper staining

40x and 100x powers

The emerging coloration is a form of structural coloration

Electrochemical exfoliation is a form of large-scale graphene production from graphite rod or highly orientated pyrolyticgraphite (HOPG)

Exchange/Return Notes