Physics
Which of the following are used for accurately measuring very small time intervals ?

Pulsars
White dwarfs
Quartz clocks
Atomic clocks

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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

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

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