The contact angle between pure water and pure silver is 90°. If a capillary tube made of silver is dipped at one end in pure water, will the water rise in the capillary?

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Solution

No, the water will neither rise nor fall in the silver capillary.

$According to Jurin' s law, the level of water inside a capillary tube is given by h = \frac{2 Tcosθ}{rρg} Here, θ = 90^{0} \Rightarrow h = \frac{2 Tcos 90^{0}}{rρg} \Rightarrow h = 0$

Thus, the water level neither rises nor falls.

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The contact angle between pure water and pure silver is 90°. If a capillary tube made of silver is dipped at one end in pure water, will the water rise in the capillary?

No, the water will neither rise nor fall in the silver capillary. According to Jurin's law, the level of water inside a capillary tube is given byh=2TcosθrρgHere, θ = 900⇒h =2Tcos900rρg ⇒h=0 Thus, the water level neither rises nor falls.