Physics
Tungsten is used for the manufacture of the filament of an electric bulb, because

It is economical
It has a very high melting point
It is malleable
It is a good conductor

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Physics
Which is evidence that supports the dynamo theory?

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

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Physics
What is the direction of torque?

Perpendicular to the direction of applied force
Parallel to the radius
Same as the direction of applied force
Opposite to the direction of applied force

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