Physics
Scalar Quantities are

Physical quantities which have no magnitude and no direction
Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and no direction
Physical quantities which have magnitude only and direction

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Physics
Which is evidence that supports the dynamo theory?

Earth's outer core contains liquid that conducts electricity
Convection occurs in Earth's inner core
Granite and basalt conduct electricity
Earth's core contains a large amount of iron

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