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Calculate the work done in increasing the radius of a soap bubble in air from 1 cm to 2 cm. The surface tension of soap solution is 30 dyne/cm. (Π = 3.142).
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When a sparingly soluble substance like alcohol is dissolved in water, surface tension of water
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Name the logic gate which generated high output when at least one input is high.
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Which of the following equations represents a wave travelling along Y-axis?
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The energy stored in a soap bubble of diameter 6 cm and T = 0.04 N/m is nearly ______.
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Why is the surface tension of paints and lubricating oils kept low?
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How much amount of work is done in forming a soap bubble of radius r?
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Explain the capillary action.
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Derive an expression for capillary rise for a liquid having a concave meniscus.
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Calculate the rise of water inside a clean glass capillary tube of radius 0.1 mm, when immersed in water of surface tension 7 × 10-2 N/m. The angle of contact between water and glass is zero, the density of water = 1000 kg/m3, g = 9.8 m/s2.
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Twenty-seven droplets of water, each of radius 0.1 mm coalesce into a single drop. Find the change in surface energy. Surface tension of water is 0.072 N/m.
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A drop of mercury of radius 0.2 cm is broken into 8 droplets of the same size. Find the work done if the surface tension of mercury is 435.5 dyn/cm.
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State the Wien's displacement law
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Explain the spectral distribution of blackbody radiation.
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Two inductor coils with inductance 10 mH and 20 mH are connected in series. What is the resultant inductance of the combination of the two coils?
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What is the energy required to build up current of 1A in an inductor of 20 mH?
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Obtain the expression for the period of a simple pendulum performing S.H.M.
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Answer in brief.
State the law of simple pendulum.
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A simple pendulum performs S.H.M. of period 4 seconds. How much time after crossing the mean position, will the displacement of the bob be one-third of its amplitude.
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A simple pendulum of length 100 cm performs S.H.M. Find the restoring force acting on its bob of mass 50 g when the displacement from the mean position is 3 cm.
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