Four point charges qA=2 µC, qB=-5 µC, qc=-2 µC and qD=+5 µC are located at the corners of a square ABCD of side 10 cm. What is the force on a charge of 1 µc placed at the centre of the square?
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In order to estimate the frictional head loss in a pipe 1 m in diameter, through
which castor oil of specific gravity 0.96 and dynamic viscosity 9.9 poise, is to
be transported at the rate of 5000 litres per second, a test was conducted on
a pipe of diameter 50 mm using water at 15°C as the model fluid. Calculate
the discharge required for the model pipe.
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