Physics
Second and third class levers are differentiated by

The location of the load
The location of the fulcrum
The type of fulcrum present
The presence of multiple loads

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Physics
The sensation of weightlessness in a spacecraft in an orbit is due to the

Presence of gravity outside but not inside the spacecraft
Fact that spacecraft in the orbit has no energy
Absence of gravity outside
Acceleration in the orbit which is equal to the acceleration due to gravity outside

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Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

Decreasing the radius of the capillary tube
None of these
Increasing the height of water in the vessel
Increasing the radius of the capillary tube

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