Engineering - February 2007

well the time has come for assassins. the fun game where kids run around trying to get each other out. of course supper soakers and other such squirt guns are okay, im looking for something a little more reliable. seeing as every squirt gun I have ever had has fallen apart due to cheap materials and bad designs. I have a decent concept but am having trouble finding the right materials. I figure I won't be able to find a water pump that is afordable but powerfull enough to spray perhaps a 1/4 inch stream a good distance. My idea was to partialy fill a pressure tank with water, say 3/4 of the way. then use an air compressor to bring the pressure up to around 120 PSI. Then using a solinoid valve to relese the water via an opening at or near the bottom of the tank. As the water drains, a pressure switch would turn the compressor back on.The water would flow up a high pressure hose and out of a small section of threaded pipe. Obviously I have taken all safety issues into consideration.

2007-02-23 19:11:11 · 2 answers · asked by cronos51101 5

2007-02-23 18:45:30 · 1 answers · asked by porac 1

2007-02-23 18:18:21 · 6 answers · asked by Andrew Selvam 1

2007-02-23 18:13:23 · 5 answers · asked by Andrew Selvam 1

2007-02-23 17:44:55 · 1 answers · asked by analiza m 1

2007-02-23 17:44:04 · 4 answers · asked by Anonymous

2007-02-23 17:19:19 · 1 answers · asked by jochel 1

PLease give me some disadvantages of iron i need it for my assignment i searched the whole web but didnt find anything usefull please some tell me some disadvantages of iron..
thanks..

2007-02-23 16:59:40 · 4 answers · asked by joshua r 1

considering they have over a million parts ?

2007-02-23 16:38:47 · 2 answers · asked by Anonymous

f=Ec+/- 3.4e10.

how much energy do i need to melt the alloy brass?
help!!!!!!1

2007-02-23 16:38:02 · 2 answers · asked by bugz 1

2007-02-23 16:32:51 · 3 answers · asked by karolinasandoval@sbcglobal.net 1

2007-02-23 16:26:11 · 2 answers · asked by Anonymous

This is for my chem class, im in pre calc so I think im over thinking the question... I havea nother chem wuestion too i am overthinking: If you splash water out of the cylender when you add a eraser would the measurment of the volume if the stopper have been too high or low? Im confused it says eraser then stopper are those the same thing?

2007-02-23 16:24:41 · 4 answers · asked by Anonymous

just wondering

2007-02-23 15:43:17 · 2 answers · asked by macgyver 1

I'm going to be getting into engineering and I would like to explore design programs as it is something essential to the field. What is advised of me to learn? Would it be more prudent to start off w/ cad? What do engineers use most, specifically mechanical and automotive engineers? thanks

2007-02-23 15:30:08 · 6 answers · asked by Anonymous

I'm searching about water filters,I did it with carbon activated filters and I want to know more, somebody told me there are filters that works with "resin".

2007-02-23 15:28:29 · 2 answers · asked by parangaracutirimicuaro 1

so if you are trying to find the surface area of a right cylinder given the circumference(18pi) and height(10ft) how would you set it up?

2007-02-23 15:28:09 · 3 answers · asked by soljagurl317 2

My mother has very sensitive hearing, and she lives right next to a new building that has generators put outside inside what, to me, is a sound proof container. My mother says the sound drives her crazy and that it is very loud. And her hearing seems to have been negatively affected by it. I was wondering if there was a practical way to check the sound frequency and intensity and if it was known whether very high frequency sound would cause hearing loss, with any references if possible.

2007-02-23 15:24:07 · 3 answers · asked by Fouad B 1

Demodulation is done in DSP kit by using MATLAB

2007-02-23 15:23:53 · 1 answers · asked by prashanth m 1

2007-02-23 15:20:40 · 2 answers · asked by Anonymous

Basically i am confused and i am curious to know how exactly a signal is transmitted in the air,i want to visualize it.I will be thankful if u can provide any link?

2007-02-23 15:17:27 · 7 answers · asked by Rahul_g 1

2007-02-23 15:01:28 · 5 answers · asked by Anonymous

2007-02-23 13:40:32 · 19 answers · asked by khanage619 1

just wondering

2007-02-23 13:32:26 · 6 answers · asked by macgyver 1

I want to buy steel. My problem is i purchase it from a middle man, so i need to know what MIld steel is. What it's real name or specifications is/are. I dont want to end up purchasing Black steel or other stuff i can sell or use...

2007-02-23 13:31:49 · 6 answers · asked by IHateTrolls 2

i mean like 500 miliamps

2007-02-23 12:55:31 · 5 answers · asked by macgyver 1

Microwave link=10GHz,Tx=20m height,Hill located 10KM away from Tx,Hill Height=80m,Max Pathloss=169dB,Hill is 20KM away from Rx,find Rx height when max pathloss=168dB

2007-02-23 11:21:57 · 6 answers · asked by ali_sendme 1

2007-02-23 11:05:46 · 5 answers · asked by chato 1

I noticed that the formua for Kinetic Energy (KE=.5mv^2) results in Joules, and Joules can be converted into Watts/Kilowatts, which is the same unit of measure as the energy output of electric generators.

So my question is this: If you have an electric generator that is powered by Kinetic Energy such as Wind or Hydro power, is the calculation for how much energy the generator will generate simply the amount of kinetic energy multiplied by some "Generator efficiency" percentage? And if so what is that percentage called?

2007-02-23 10:42:37 · 2 answers · asked by Ray of Freaking Sunshine! 2

Hi I have a project to complete for my university. I am
designing a PDA controlled vending machine. I have made a program on Labview for the PDA. Now when the user opens the software and stands infront of the vending machine he will scan for vending machines.
whatever he wants he then selects that vending machine. the vending machine will have buttons corresponding to 3 slections. When the user selects the button,the microcontroller in the venidng machine will send a signal to a computer that will also be connected to the
microcontroller. If the person has enough balance the microcontroller
will turn the correspoind motor on so it can vend the item. the motor is
24 VAC. the microcontroller also needs to be connected to a bluetooth
tranceiver. My question is that I am looking for the right
microcontroller that can be able to turn on one of the desired motors. I
will connect each motor to the microcontroller though a relay. could you
please guide me how to od it.

2007-02-23 10:38:18 · 4 answers · asked by UZ 1