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Mechanical Properties of Fluids
Question
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Why the nib of a pen is split?

Answer

The tip of nib of a writing pen is split to provide the capillary action.
Due to capillarity, ink will rise in the split of nib and allows the pen to write continuously. 

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Some More Questions From Mechanical Properties of Fluids Chapter

What is an ideal liquid?

Do liquids exert pressure?

Define pressure.

What is the direction of pressure?

What is the direction in which pressure exerts force on the walls of a container?

What is the SI unit of pressure?

You have two identical glass flasks. One is open mouthed and other is filled with helium and sealed. Which of the two will weigh more?

A cylinder of length l and area of cross section a is filled with liquid of density ρ to a height h. What is the pressure at the bottom due to height column of liquid?