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Homework Statement A sinusoidal voltage waveform is rectified so that it becomes a half-wave waveform (i.e. the bottom half has been "chopped off"). Determine: i) The average p.d. ii) The RMS p.d. iii) The heat dissipated in a 200ohm resistor in 100sHomework Equations P_{avg} =...

Thanks for your reply. So can we approximate the surface velocity to be zero? In which case: p_{1} + \frac{1}{2} \rho v_{1}^2 + \rho gh = p_{2} + \frac{1}{2} \rho v_{2}^2 But since p_{1} = p_{2} and v_{1}=0 then we get v_{2} = \sqrt{2gh} .

Homework Statement A container is filled with liquid, density d. The depth of the liquid is h. A narrow, horizontal, tube at the bottom of the container is letting the liquid flow out at a speed v. The height of the liquid is kept constant. What is the velocity of the liquid...

Homework Statement A uniform capillary tube (with one end sealed) contains air trapped by a mercury thread 40mm long. When the tube is placed horizontally, the length of the air column is 36 mm. When placed vertically, with the open end of the tube downwards, the length of air column is now x...