Recent questions in 11th Physics

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Explain why Surface tension of a liquid is independent of the area of the

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Explain why Water with detergent disolved in it should have small angles of

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Explain why A drop of liquid under no external forces is always spherical in

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Fill in the blanks using the word(s) from the list appended with each statement: Surface tension of liquids generally ... with temperatures (increases /

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Fill in the blanks using the word(s) from the list appended with each statement: Viscosity of gases ... with temperature, whereas viscosity of liquids ... with temperature (increases /

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Fill in the blanks using the word(s) from the list appended with each statement: For solids with elastic modulus of rigidity, the shearing force is proportional to ... , while for fluids it is proportional to ... (shear strain / rate of shear

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Fill in the blanks using the word(s) from the list appended with each statement: For a fluid in a steady flow, the increase in flow speed at a constriction follows (conservation of mass / Bernoulli’s

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Fill in the blanks using the word(s) from the list appended with each statement: For the model of a plane in a wind tunnel, turbulence occurs at a ... speed for turbulence for an actual plane (greater /

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Explain why To keep a piece of paper horizontal, you should blow over, not under,

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Explain why When we try to close a water tap with our fingers, fast jets of water gush through the openings between our

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Explain why The size of the needle of a syringe controls flow rate better than the thumb pressure exerted by a doctor while administering an

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Explain why A fluid flowing out of a small hole in a vessel results in a backward thrust on the

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Explain why A spinning cricket ball in air does not follow a parabolic

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A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0 cm. What is the pressure exerted by the heel on the horizontal floor

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Toricelli’s barometer used mercury. Pascal duplicated it using French wine of density 984 kg `m^(–3)`. Determine the height of the wine column for normal atmospheric

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A vertical off-shore structure is built to withstand a maximum stress of `10^9` Pa. Is the structure suitable for putting up on top of an oil well in the ocean ? Take the depth of the ocean to be roughly 3 km, and ignore ocean

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 `cm^2`. What maximum pressure would the smaller piston have to bear

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A U-tube contains water and methylated spirit separated by mercury. The mercury columns in the two arms are in level with 10.0 cm of water in one arm and 12.5 cm of spirit in the other. What is the specific gravity of spirit

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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In the previous problem, if 15.0 cm of water and spirit each are further poured into the respective arms of the tube, what is the difference in the levels of mercury in the two arms ? (Specific gravity of mercury =

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Does it matter if one uses gauge instead of absolute pressures in applying Bernoulli’s equation ?

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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