Engineering - January 2007

2007-01-09 20:23:15 · 3 answers · asked by Anonymous

2007-01-09 16:42:19 · 6 answers · asked by Anonymous

2007-01-09 16:30:49 · 7 answers · asked by 3.141592653589793238462643383279 3

pic16f873 is microcontroller

2007-01-09 16:26:27 · 1 answers · asked by nim m 1

Assuming a 60 hz system, how much time in seconds is the maximum positive current behind the maximum positive voltage when the current lags the voltage by;

a) 90 degrees
b) 0 degree
c) 60 degrees

2007-01-09 16:22:09 · 8 answers · asked by Teolo B 1

wanna autocad drawings , catia drawings , inventor drawings

2007-01-09 16:20:12 · 3 answers · asked by cdac_mohali 1

2007-01-09 15:13:25 · 15 answers · asked by vijay p 1

How were Robots used in the past? what tasks did the perform?
How are Robots today? What tasks do they perform?
How will Robots be in the future? What tasks will they perform?

All help will be rewarded with at least a thumbs up!!!

2007-01-09 14:49:21 · 10 answers · asked by Anonymous

in a oscillator circiut

2007-01-09 14:39:43 · 2 answers · asked by craig h 1

I`m doing a project for my physics/chemistry class for a mousetrap car..It`s supposed to be simple, since we`re only in middle school, and I can`t use any manufactured items (like Toy car wheels, lego wheels, etc.) or I`m just allowed to use things that I can find in my drawer or around the house.
Does anyone have any tips? Or help how to build a good one? o_o; All I have is a mousetrap..It needs to go at least 1-2m, have the body shape larger than the trap, and added material to produce traction to all wheels. :x

Please help? ^^;

Pictures do help as well, but I already skimmed through a lot of websites I looked up on Google/Yahoo...

Thank you. :D

2007-01-09 14:18:58 · 2 answers · asked by 2514 2

Can I make a heat pump straight A/C ?
Or some hints how to replace the reversing valve without reclaiming freon

2007-01-09 14:01:36 · 4 answers · asked by apup76 3

2007-01-09 13:51:43 · 2 answers · asked by Aika 1

Dear my friend,

I live in Ohio and go to a High School. I am currently doing a science fair project on solar energy. I am comparing a stationary solar cell system to a one axis tracking system. I am wondering if anyone would be able to give me a price quote of a fixed solar system and a movable one. Your help would be much appreciated.

I have already sent e-mail to three different “solar” companies. As of now, none have returned. If you answer, and want the more details of my project feel free to contact me.

Sincerely,
Zubacat

2007-01-09 13:00:26 · 3 answers · asked by zuba_cat 1

I have had this idea in mind that i could make this invention where its like a calculator with numbers and letters you punch in the adress of where you want to be turn the light towards you and zap yourself there.I honestly think its possible because camera's were invented weren't they? and so were these digits. but any ideas on how to make this better happen thanks.^-^

2007-01-09 12:54:57 · 5 answers · asked by cass b 1

2007-01-09 12:27:22 · 3 answers · asked by M Dawg 2

I have a measurement device that I want to calibrate. From observation, it appears that a quadratic cal equation will be needed, i.e., y = ax^2 + bx + c where y is the value to be displayed, x is the raw value produced by the device, and a, b, & c are the calibration coefficients. The plan is to simultaneously take 'n' different measurements from the device (i.e., a list of 'x' values) and from a calibration standard (i.e., a list of 'y' values) that are approximately uniformly distributed over the device measurement range and then to use least-squares regression to compute a, b, & c. The minimum value of 'n' is clearly 3. Intuitively, increasing 'n' will reduce the error of the calibration process, however I'm hoping to get some quantitative guidance in choosing 'n'.

2007-01-09 12:19:52 · 2 answers · asked by Calli Braytor 1

I have one 6 years old son who is so interested in how to build bridges, tunnels, skyscrapers etc, and also fastinates about fast trains especially Maglev, and I am running out of ideas of constructions, experiments and all the TV programs I could provide. Could anyone give me suggestions where to find more challenges or interesting places like museums or exhibition centers (local or overseas ones) that can inspire us. Thank you.

2007-01-09 12:01:34 · 3 answers · asked by J A 1

My son is doing a science project where he is making a foam board phonograph. He'll spin a record with a hat pin connected to the foam board which will cause the vibrations to travel so that we can hear the music. The instructions say to use a hat pin.

I went to 2 craft stores to no avail. I do have corsage pins but nobody seems to know for sure if these can work to replace the hat pin. My questions are is a hat pin thicker than other pins - (maybe so that it can transfer the vibrations better)? And is it less sharp than a corsage pin? Did they not suggest corsage pins possibly because the sharp tip might scratch the record?

How much difference is there between the hat and corsage pin?
Thanks!

2007-01-09 11:59:36 · 2 answers · asked by Red Birds 2

show work

2007-01-09 11:06:21 · 11 answers · asked by Latinballa 1

How can I make an easy catapult using simple household supplies and easy-to-follow directions with not too much drilling and nailing and screwing?

2007-01-09 10:57:53 · 3 answers · asked by Anonymous 1

me and my dad like to make stuff or do something every weekend, like one weekend we made potato guns (legal in my state), another we went snowboarding, this weekend he wants to do something with air compression. what do you think we could build? we have an air compresser that goes up to 250 PSI and lots of high pressure rated pvc pipe.

2007-01-09 10:26:05 · 7 answers · asked by Anonymous

I'm making an electrical shock for my science project. Help me please....and i need to know how to make a sensor

2007-01-09 10:22:47 · 6 answers · asked by forever143kandi08 2

tripled?

2007-01-09 10:02:22 · 1 answers · asked by heelloo 1

Where will it end up

2007-01-09 09:56:44 · 29 answers · asked by Anonymous

I want to cut a large circle (14" diameter) out of a sheet of 1/8" aluminum. Is it posible to use a router with a machining endmill as the router bit to do this? Of course I would use a circle jig.

2007-01-09 09:48:26 · 4 answers · asked by Daniel C 1

Can the conductors to the gas and water be left with a csa of 6mm and also electrode conductor be left at 6mm . no cables go underground and are in capping in walls. consumer unit has 100mA rcd with split load 30mA rcd for sockets

2007-01-09 09:08:23 · 2 answers · asked by GARRY G 1

2007-01-09 08:16:24 · 6 answers · asked by chipshop 1

2007-01-09 07:39:38 · 5 answers · asked by johnsmithinlondon 1

2007-01-09 07:18:51 · 1 answers · asked by Anonymous

How do you measure a window in square feet? I have double pane vinyl windows that pull in and I need to measure the open area of the window in square feet (5.7 feet) Is what I need. How do I measure that?

2007-01-09 07:16:09 · 7 answers · asked by D. D. 2