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Question 1 of 6
1. Question
What is surface tension?
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Question 2 of 6
2. Question
What is the capillary effect?
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Question 3 of 6
3. Question
The nutrients dissolved in the water carry them to the plant tops tiny tubes, partly due to the capillarity effect. Determine how high you will go the aqueous solution in a tree, in a tube whose diameter measures 0.005 mm, as a result of the capillary effect. Treat the solution as water at 20°C with a contact angle of 15°.
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Question 4 of 6
4. Question
A solid steel ball can float on water due to the effect of surface tension. Determine the maximum diameter of a steel ball that would float on water at 20°C. What would your answer be for an aluminum ball? Take the density of the steel ball and aluminum as 7,800 kg/m³ and 2,700 kg/m³, respectively.
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Question 5 of 6
5. Question
The manometric pressure of the air in the air is measured. the tank, as shown in Figure, and turns out to be 65 kPa. Determine difference h in mercury levels.
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Question 6 of 6
6. Question
The flow of water from a container is controlled by a L-shaped gate, 5 ft wide, hinged at the point A, as shown in Figure If you want it the gate opens when the water height is 12 ft, determine the mass of the necessary weight W.
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