Examlex
A system consisting of a positively-charged particle and an electric field
Natron
A natural mineral mixture of sodium carbonate decahydrate (Na2CO3·10H2O) and sodium bicarbonate (NaHCO3) among others, historically used as a cleaning product and a preservative.
Sodium
A chemical element with the symbol "Na" and atomic number 11, widely known for its role in salt (sodium chloride) and various other compounds.
Elemental Metals
These are pure chemical substances consisting of a single type of atom that exhibits metallic properties such as conductivity, malleability, and luster.
Tungsten
A chemical element with the symbol W and atomic number 74, known for its high melting point and strength when alloyed.
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Q14: If the electric field just outside a
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Q58: Enrico says that positive charge is created
Q62: The point P lies along the perpendicular