Hi all, I am trying to get my head around some experiment results but I am struggling a bit.
According to my notes H field strength is equal to MMF / effective length
However this doesn't take into account the effects of reluctance? Eg a toroid made from 2m of iron bar and a straight 1m...
Hi all i hope some one can help but i have a feeling there will be no easy calculations for this one:confused:
Im trying to calculate actual eddy current losses in 50hz mains transformers depending on lamination sizes and can't seem to find any info on the subject that's sub electrical degree...
unfortunately nearly incompressible doesn't count at 7000 bar, i don't expect the rise to be to great but i need to figure out what it will be and don't know enough about thermodynamics to get there!
I did stumble across the answer on a different forum a few months ago but I am damned if i can...
Hi all,
Hope you can help I am trying to figure out the temperature rise in a liquid subject to high pressures (7000bar in this case)
Is the below adiabatic gas equation still suitable? or is there another way of working this out for liquids?
T2 = T1(v1/v2)^y-1
P2 = P1(v1/v2)^y
Were y =...
ok let me rephrase, ignoring seal losses :) there is no airspace between the cylinder and piston (we can evacuate it with another pump first to check). It would take more than 14.7 lb of force to move the piston and what would we have when it did move? i know weird things happen under high...
Hi all, i was pottering away at work yesterday and realized just how little i truly understand about vacuum! So i have a question, i have a piston in a cylinder, the piston is fully in the cylinder so there is very little air space and the cylinder port is blocked off, the piston has an area of...
Hi guys and girls,
I hope you can help an electronics engineer out of his place in the mechanical world:rolleyes:
My very basic question is for a vessel holding a liquid at a given pressure and a given opening in the vessel how can i calculate exit velocity and mass flow rate? Like if i...
Ok try it with the pulleys idea, if you have a small gear driving a large gear )lets say twice the number of teeth) for one revoloution of the smaller gear- say 10teeth only half a revoloution of the larger gear (20th in this case) can take place as the teeth lock each other together.
The...
Hi all, well some time studying the equations and a bit of experimentings put me on the right tracks! from the fact that no area of contact is included in the equations I am gathering that the length of the line of contact between the cylinders has no effect on the required force?
I.e wether...
zeal science- the force is pushing the 2 rollers together side on like over meshing a pair of gears (only no teeth on the rollers)
So f=μN where N is the normal force. The product fR where R is the radius of the second disc will be equal to the torque being transmitted.
So for example...
HI all wonder if anyone can help I am banging my head on this one! If i have 2 discs of a given material with smooth edges (imagine 2 gears side to side but no teeth) How do i calculate the required force to create enough friction to transmit a given amount of torque between the 2? i have the...