Engineering - January 2007

2007-01-23 15:38:29 · 1 answers · asked by Reami T 1

I have been assigned a Tech project and I have to incorporate every simple machine into one long sequence of machines that will be started by touching one end. Once touched it must run by itself. It must last longer than 5 seconds and fit on a 1 foot by 1 foot wood board. All machines must take advantage of their mechanical advantage (i.e. no rolling down incline planes or screws). I am allowed to use any materials I can find. Any ideas on how I could make this work? Especially, how can you make use of a screw?

2007-01-23 14:51:18 · 4 answers · asked by Joe 2

2007-01-23 14:50:12 · 1 answers · asked by daisy w 2

I have to build a decibel meter and I am wondering if anybody knows how or where I can find some step-by-step tutorials for building one with all the materials needed and all the stuff...Any help would be appreciated...

2007-01-23 13:39:47 · 1 answers · asked by Jyler 1

Hi,

How do you build a XOR gate using only AND, OR, and NOT gates?


Thanks!

2007-01-23 13:10:15 · 4 answers · asked by Anonymous

Isnt there like biomedical engineering or something and what are the other types...

2007-01-23 13:07:52 · 6 answers · asked by system error 2

This is the 1st topic in engineering science 2, so i hope you all can help me. thank you!

2007-01-23 12:55:35 · 3 answers · asked by 夜神月 1

2007-01-23 12:40:48 · 4 answers · asked by howard-kenneth@sbcglobal.net 1

Note that electricity in Phila PA area is about 6 cents/kwh--and the new heatpump has EER of 13.
Gas furnace also new and approx 94% efficient.
Both use the same whole house blower system.
Gas furnace kicks in when temp falls below 32 F in Phila area.

Thanks for your thoughtful replies....
jv

2007-01-23 12:09:48 · 3 answers · asked by Sticky-1 1

remember the inductor is in a dc current circuit and how do you figure out how much volts the thing will discharge based on the stored energy it has

2007-01-23 11:47:19 · 3 answers · asked by macgyver 1

2007-01-23 11:38:35 · 4 answers · asked by Anonymous

is there a certain chemical in there that makes it rechargeable

2007-01-23 11:38:22 · 4 answers · asked by macgyver 1

If you mixed 8.0 tons of sand, 12 tons of rock, and 4.0 tons of cement to make concrete, what would the percent by weight of sand be

2007-01-23 11:15:28 · 7 answers · asked by tamdj2001number1 1

2007-01-23 10:53:58 · 6 answers · asked by nicko 1

I really need to get my science grade up and i'm pretty good at projects so please help < 333

2007-01-23 09:57:29 · 4 answers · asked by Anonymous

I want to know about a needle valve that can controll the flow one way but is non restrictive in the other direction.

2007-01-23 09:38:35 · 1 answers · asked by hit_the_set 1

(i) What is the x component of this vector?
(ii) What is the y component of this vector?
(iii) What is the z component of this vector?

2007-01-23 09:36:38 · 2 answers · asked by ozi 1

2007-01-23 09:06:07 · 6 answers · asked by renasis 2

was it Slavoljub Eduard Penkala

2007-01-23 08:39:38 · 5 answers · asked by lesmaritx 1

, pipe cleaners, that is 5cm high and spans 40 cm. How do I do it?

Please Help!!!!!!!!!!!!!!

2007-01-23 08:02:54 · 1 answers · asked by sklinckyyy 1

2007-01-23 07:37:26 · 4 answers · asked by Anonymous

2007-01-23 07:28:17 · 19 answers · asked by chris p 3

I want to use an Inverter duty motor for an application. And I want to use Automation Direct `s GS2 AC 3.0HP drive, but since there are a lot of choices I do not know if this manufacturer is good or not. Can you recommend? and provide a list of best manufacturers, from 1 to 10, if possible. Thanks a lot.

2007-01-23 06:50:46 · 1 answers · asked by Anonymous

I have a 1 story home, composition shingles, 1/2" plywood over original horizontal battons. 6" concrete foundation floor. existing room is 14.5 wide, new room would be 17.5 wide.

I want to remove a load bearing wall. Existing joists are 2x6x15 24" on center and join over the load bearing wall to be removed (the wall is about 1 ft to the "left " of center join). The next wall that I can use for support is the other side of the hallway 3 1/2 ft to the "right" of existing wall.

There are only two 2x4's used as support for the ridge beam in the attic over this area of the house (i think this is inadequate, but its been there for 40 years). Can I use/create a wider beam rather than taller, span tables only show in the order of 2x, not 4x or 6x. and I do not know how this will work. In addition where can I locate different beam manufacutreres (LVL, steel ) what size beam?

I would like to stay under 6" in height of the new beam so it will still fit in the existing spac

2007-01-23 06:40:33 · 2 answers · asked by fm92555 1

I have to select between machine bolts which have carved radial marks on their head and without anything on their head. So, I want to know what is the purpose of radial signs on the bolts' head as put by manufacturers?

2007-01-23 06:35:11 · 4 answers · asked by Solskjaer 1

I have measured the height and I have the radius of the top, how can I establish how many litres it'll hold?

2007-01-23 06:20:03 · 12 answers · asked by t88ny 1

we have a safe at work. I havent seen it for ten years. The mystery is whats in it? the key and number cannot be found

a lock smith wants £500 to open it. they asked me an engineer to look at it. I cut my finger moving it ten years ago its pay back time.

I dont think the burning tackle will help I think the hinges are only the primary obstical. The are probably dead bolts. It has a key hole has well has the dial. Should I burn through the key hole and locks or the hinges or both?( It could fuse weld the lock) Its about four foot square and weights about a ton. Although I have no claim to its contents should I open it I will reveal them

2007-01-23 06:13:50 · 16 answers · asked by froggerty 3

can anybody give me a discription of a planetary gear motor and how it differs from other motors ?

2007-01-23 06:04:57 · 2 answers · asked by AS IT IS 1

Only currently working engineers answer, please. I am trying to make myself more marketable in the engineering fields and maybe pick up extra projects on the side. I am already self-taught with data historian software, some neural network software, some VB programming and MS Office suite. Would AutoCAD be the direction that you would go or is there another area or trend that would be more appealing or lucrative? (Short of actually getting an engineering degree...If I only had the time!!) Thanks very much.

2007-01-23 05:56:36 · 6 answers · asked by techengr36 2

2007-01-23 05:30:18 · 2 answers · asked by angel d 1