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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ८

The property of _______ of a liquid surface enables the water droplets to move upward in plants. - Science

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प्रश्न

The property of _______ of a liquid surface enables the water droplets to move upward in plants.

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उत्तर

The property of surface tension of a liquid surface enables the water droplets to move upward in plants.

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अध्याय 2: Force and Pressure - Exercises [पृष्ठ १९]

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सामाचीर कलवी Science [English] Class 8 TN Board
अध्याय 2 Force and Pressure
Exercises | Q II. 3. | पृष्ठ १९

संबंधित प्रश्न

Find the excess pressure inside (a) a drop of mercury of radius 2 mm (b) a soap bubble of radius 4 mm and (c) an air bubble of radius 4 mm formed inside a tank of water. Surface tension of mercury, soap solution and water are 0.465 N m−1, 0.03 N m−1 and 0.076 N m−1 respectively.


Find the surface energy of water kept in a cylindrical vessel of radius 6.0 cm. Surface tension of water = 0.075 J m−2.


A drop of mercury of radius 2 mm is split into 8 identical droplets. Find the increase in surface energy. Surface tension of mercury = 0.465 J m−2.


A capillary tube of radius 1 mm is kept vertical with the lower end in water. (a) Find the height of water raised in the capillary. (b) If the length of the capillary tube is half the answer of part , find the angle θ made by the water surface in the capillary with the wall.


Solve the previous problem if the lead piece is fastened on the top surface of the block and the block is to float with its upper surface just dipping into water.


Why is the surface tension of paints and lubricating oils kept low?


What are the factors affecting the surface tension of a liquid?


A drop of oil placed on the surface of water spreads out. But a drop of water place on oil contracts to a spherical shape. Why?


Obtain an expression for the surface tension of a liquid by the capillary rise method.


A capillary of diameter d mm is dipped in water such that the water rises to a height of 30 mm. If the radius of the capillary is made `(2/3)` of its previous value, then compute the height up to which water will rise in the new capillary?


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