# Recent content by banerjeerupak

1. ### Calculation of magnetic force on a wire

What I am really trying to do is move a length of wire along a duct, from outside the duct. I will be doing it experimentally. However, it would help if I could calculate the strength of the magnet I would need rather than trying to guess and do it by trial and error.
2. ### Calculation of magnetic force on a wire

Hi, I would like to know if it is possible to move a steel wire against frictional forces using a magnet. What would be the approach of calculating the force acting on that thin wire. I would know the dimensions of the wire and the dimensions of the magnet. What other values should I find...
3. ### Voltage. What is it really?

I think the box being pushed analogy makes the most sense. I passed through school and then college without ever realizing how cool this analogy was. Drakkith gave a great thing to remember about voltage!!
4. ### A Question on Fluid Pressure

Hi TheMak, Both the fluids are flowing at the same mass flow rate. As fluid properties are also the same, the volumetric flow rate may also be considered to be equal. As the pipes have different cross sectional areas, the fluid velocities would be different. Pipe A with the smaller cross...
5. ### WHat is the uncertainty in a metre rule?

This method of uncertainty calculation is correct, but it holds for calculating the uncertainty when using different rulers (sensors in general). In this case, the maximum uncertainty is 1mm. This is because in the first reading you could be off by -0.5 mm and in the second reading it could be...
6. ### Experimental Fluid Mechanics Videos Series

An invaluable source. Really great. I have enjoyed a good few of them, and keep referring other people to go to the page or share the videos. They are just awesome. Thanks for sharing them.
7. ### De - Ionized (DI) Water

Thanks for the insight. The replies have all helped a lot. I understand that it is highly pure form of water. And it is quite corrosive too due to the attraction it shows to ions in whichever container it is kept in. I am keeping my DI water in plastic containers. I was hoping for a time scale...
8. ### De - Ionized (DI) Water

Hi, How long does de-ionized water remain de-ionized. After what amount of time would it start geting ionized again. I understand that it would greatly depend on the container in which it is kept and the environmental conditions. However, the order of the time would help me. Thanks.
9. ### Finding the right Tires

Another likely option if you wanted slightly higher speeds would be the motorcycle wheels with spokes. They are much lighter than car wheels and perform nicely for light weight vehicles. This is only if you want to attain higher speeds. For low speeds, the cycle tires should do fine.
10. ### Variable pressure

I am working on an experiment where i would like to see how the system responds to pressure fluctuations. I tried using a stepper motor and a cam arrangement to create pulses in the pipe carrying water to the system. However, I can't get higher frequencies of pressure oscillations. I have...
11. ### Depth of mirror

I'm feeling tempted to build it too!!
12. ### CATIA eBooks

the first link is an extract from the User Guide. Very helpful. The second link is dead. But thanks a lot for the links. It was a lot of help
13. ### Variable pressure

I need to introduce variable pressure into a system. I was planning on using piston pumps which if i run at low rpms would result in controlled fluctuating pressures. Am i doing something wrong?
14. ### Humidity and its effect on air properties

Hi, I would like to find the properties of humid air at different humidities and different temperatures. What sort of charts should i consult? I tried looking at psychrometric charts, i'm not sure if i'm reading the correct thing. Thanks
15. ### Pressure Temperature Relation

I can not assume it to be compressible fluid. So the ideal gas law is ruled out. I mean the pressure (volume) and temperature.