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Physics - Fluid Mechanics Questions and Answer >>

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1. Water is moving with a speed of 5.18 ms-1 through a pipe with a cross-sectional area of 4.20 cm2. The water gradually descends 9.66 m as the pipe increase in area to 7.60 cm2. The speed of flow at the lower level is


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2. The value of g at a place decreases by 2%. The barometric height of mercury


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3. A small sphere of mass m is dropped from a great height. After it has fallen 100 m, it has attained its terminal velocity and continues to fall at that speed. The work done by air friction against the sphere during the first 100 m of fall is . [MP PMT 1990]


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4. Two pieces of metal when immersed in a liquid have equal upthrust on them; then


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5. A solid sphere of density η ( > 1) times lighter than water is suspended in a water tank by a string tied to its base as shown in fig. If the mass of the sphere is m then the tension in the string is given by


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