Recent content by bartrocs

Perfect! I did not think of that. It would probably be a more cost effective solution as I could use force transducers on the mountings and measure torque that way. Thanks for your help

of course, I understand the theory, I was probably not clear enough but I am interested in the actual system of measurement, for example, if I had some motor driving a shaft with the drum on it. If I put a reactive torque (torsional) sensor inline between the drum and the motor, would that work...

Hi, if I have a block of metal with a quarter circle curve cut out of it, and a metal roller of matching radius that contacts this curved piece, what are some ways I could go about measuring the friction between these two surfaces? The roller is fixed and the block is pushed into it with a...

In the bottom two, they've just shifted the peaks so that they line up to make stretching and squashing effect more apparent.

I'm preparing a poster presentation on the following paper for a physics course: http://t.co/xiCLV7Y0ZH I do not understand how figure 4 tells us about the red/blue shift. Just from the deflections of the peaks of the airy beam, as well as the deformation, how are we able to infer that there is...

okay thanks I understand my mistake and (hopefully) will not make it again :smile:

blue_leaf77, thanks. It was one of those lack of sleep things. I just woke up and realized this. Also, mathematically speaking, there is an infinite amount of choices for our eigenvector based on a given eigenstate and scale factor. We must obviously use the one that fits our operator, ie it...

Hi, not a homework problem as such, but I am studying introductory quantum physics and having some trouble understanding how applying the rising or lowering operator for angular momentum implies: L+/-|l,m> ∝ |l, m+/-1> Basically, my question is the same as the first part (Q1) as described in...

On the outlet side of the duct, when the outlet is narrowed.

just as a question that leads on from this, what is the mechanism by which the static pressure increases? the pressure outside the duct is atmospheric so what property of air/what physical phenomena allows for the static pressure within the duct to increase?

Ah, I am sort of beginning to understand. So say we keep the power going to the fan constant. Now we start with a fully open outlet and take our readings. Then we reduce the outlet diameter, and take a reading again .The fan is providing a constant energy to the flow, so the flow rate of the...

Is it because the fan does work on the flow, which is not taken into account in Bernoulli's equation?

I understand this, but what is the mechanism which causes the flow rate to be lower if the outlet area is smaller? Is it because the static pressure increases on the outlet side of the fan, so it has to push harder in order to overcome the pressure gradient, so if the fan is not powerful enough...

Hi guys, I recently completed a fluid dynamics practical at Uni and submitted a report on it, however, I still have some burning questions which I need to be answered. Firstly, the data that we collected shows that as the flow rate in the duct increases, the pressure differential of the fan...

thanks! I understand now