Recent content by Michael V

Hi there, Its because the current alternates back and forth between poles, look up some DC vs AC theory. Hope that gets you going the right direction.

Ive just found this worked example. It says that the pressure at the outlet is 0. Why is this?

Hi there, I'm having a problem behind the theory of bernoulli's theorem. Can it be applied in an application where water flows from a pump into a pipe with x diameter and out of a nozzle with y diameter to atmosphere. There is a pressure gauge on said pipe. There is a nozzle screwed into this...

Here is the simple diagram. So we have a pressure reading at the gauge, which is the reading for the larger pipe in which the nozzle screws into. I'm trying to calculate a coefficient of discharge, so can it be said that our pressure at the nozzle will be atmospheric pressure as it is...

I'm testing various nozzles with orifice sizes from 5mm to 40mm. The feed water comes from a hopper that is open to atmosphere into a pump. The pump has a flowmeter at the outlet. Then a pipe feeds the pumped water to the nozzle rig. The nozzle is spraying down onto screen filters. In terms of...

I work at a company that manufactures TPU screen filters for the mining industry. I've got a test to do to inspect whether the qaulity of the TPU is affected by time in the heated barrel of the injection moulding machine. The TPU material sits in the barrel due to tea and lunch breaks (15 - 30...

So is this correct now?

In the question they said that it occurs at the point load so isn't that where your shear curve (shear force diagram) cuts the axis?

Yeah, I see the mistake now. So that would also change the max moment of resistance then?

So for each bending moment, I must take the distance from the reference point to each acting force?

Homework Statement A beam carries a uniformly distributed load, including its own weight, of 8 kN/m over its full length of 6 m. A point load of 300 kN is placed 2 metres from the one end of the beam which is simply supported. Calculate the maximum moment of resistance for the beam if it...

Its starting make sense now, I was just struggling with where the bottom datum should be but I can see it has nothing to do with flow rate or its direction. Thank you so much for your time.

So what happens when there is flow? Please could just have a look at my answer that's attached. Thanks.

Sorry, Pr is pressure.

Homework Statement The following information applies to a conical diffuser: Length = 750 mm Inlet diameter = 100 mm Outlet diameter = 175 mm Water flow = 50 l/s Pressure at inlet = 180 kPa Friction loss = \frac{k(V_{1} - V_{2})^{2}}{2g} where k = 0.15 Calculate the pressure at exit...