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I want to make asurface that has very small thicknes with dimensions of 50cm x 5m that gives me alarm when something like small ball goes throgh it How to do this ? I didnot know where to post question so if it is the wrong place could the admin move it to the right place

i have ultrasonic sensor and PIR motion sensor i want to know the shape of its waves is it cylindrical like this or cylindrical with increasing height like this or part of sphere like this or what ?!!

thnx you right i just did the initial conditions of setta and omega and it works

?!!

image in better resolution

but how to get values of omega and alpha when setta changes form 0 to 90

I am sorry the right equation is alpha = omwga^2 / setta The block diagram

I want to apply this equation on simulink. alpha = omega * setta (as setta changes from 0 to 90 degree) where: setta :- angle. omega :- angular velocity. alpha :- angular acceleration. I tried to make it So i made the following diagram But I cannot insert values for setta!! So how to enter...

Yes,Actual conditions!!

yes

ok in this situation how to calculate volume flow rate in each case !!

zdas04, I meant volume flow rate in standard conditions. I am sorry for not being precise. Two systems not added together they are two separated container having same volume (10 litter) and same pressure (6 bar). pipes is one end attached in container and other end is free on air. one pipe is 6...

I am mechanical engineer student and i got some questions to ask about pneumatic systems If i have two same pressure and volume compressed air containers and each one has pipe that supplies air to two systems. one of pipes has diameter of 6 mm and the other has diameter 4 mm. Is the following...