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Two ballons that have same weight and volume contains equal amounts of helium. One is rigid and other is free to expand as outside pressure decreases. When released, which balloon will rise

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

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An object floats on water with 20% of its volume above the water time. What is the density of object? Given Density of water =

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A cubical block of iron 5cm on each side is floating on mercury in a vessel:-1) What is the height of the block above mercury level?2) Water is poured into vessel so that it just covers the iron block. What is the height of the water column?Given Density of mercury = 13.6g|`cm^3` and Density of iron =

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

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Oil is sprinkled on sea waves to calm them.

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A drop of oil placed on the surface of water spreads out, but a drop of water placed on oil contracts.

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Water rises in a capillary tube but mercury falls in the same tube.

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What should be the pressure inside a small air bubble of 0.1mm radius situated just below the water surface? Surface tension of water =` 7.2 × 10^(-2) N`/m and atmospheric pressure = `1.013 × 10^5

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Why is a soap solution a better cleansing agent than ordinary

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The antiseptics used for cuts and wounds in human flesh have low surface tension.

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If the radius of a soap bubble is r and surface tension of the soap solution is T. Keeping the temperature constant, what is the extra energy needed to double the radius of soap

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

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Find the work done in breaking a water drop of radius 1 mm into 1000 drops. Given the surface tension of water is `72 × 10^(-3)

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

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What is the energy stored in a soap babble of diameter 4 cm, given the surface tension = 0.07

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What is the work done in splitting a drop of water of 1 mm radius into 64 droplets? Given the surface tension of water is `72 × 10^(-3)

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

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Why should detergents have small angles of

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

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Show that if two soap bubbles of radii a and b coalesce to from a single bubble of radius c. If the external pressure is P, show that the surface tension T of soap solution is

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

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What is terminal velocity? What is the terminal velocity of a body in a freely falling

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The diameter of ball A is half that of ball B. What will be their ratio of their terminal velocities in

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Find out the dimensions of co-efficient of

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What is the cause of viscosity in a fluid? How does the flow of fluid depend on

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If eight rain drops each of radius 1 mm are falling through air at a terminal velocity of 5 cm | s. If they coalesce to form a bigger drop, what is the terminal velocity of bigger

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

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