Physics
Which of the following have the same unit ?

Work and power
Torque and angular momentum
Work and torque
Torque and moment of inertia

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Physics
A cyclist leans inwards when he is negotiating a curve so that

Necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
His weight may be reduced
He may increase his speed
No frictional force may be produced between the wheels and the axle

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Physics
Which is evidence that supports the dynamo theory?

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

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