Engineering - March 2007

Hi! ^_^
I need help on how to build a catapult.. Does anyone have any info or anything to help me..
??

2007-03-02 11:26:26 · 1 answers · asked by ~D@$H~ 2

force analysis , weak points

2007-03-02 10:53:22 · 3 answers · asked by mylovenano 1

2007-03-02 10:44:26 · 1 answers · asked by shy b 1

or is the voltage different?

2007-03-02 10:07:13 · 13 answers · asked by jennywd 1

do i need a small explosion proof fan?

2007-03-02 09:24:46 · 6 answers · asked by paul r 1

I am considering Automotive / Diesel Mechanic for a career. I am making out my schedule for my senior year and I need one more science credit. I am wondering which class would be better for a mechanic career path, Physics or Chemistry?

2007-03-02 09:01:58 · 9 answers · asked by Anonymous

Hi,
I want to create own mood lights using the LEDs. I was looking into the google to find the circuits for that. But no luck so far. If you've done something similar please help me out!

Rajeev

2007-03-02 09:01:46 · 3 answers · asked by rajeever 2

2007-03-02 08:53:26 · 1 answers · asked by x0nix 3

Canaport is currently in production with a number of others at some point or another of the environmental or engineering assessment. Anyone have any idea how many are actually being considered?

2007-03-02 08:52:46 · 1 answers · asked by Gwydyon 4

Just curious,wondering if any building companies working on this type of project...

2007-03-02 08:47:40 · 7 answers · asked by mean evil woman 7

2007-03-02 08:23:46 · 2 answers · asked by engrchristie2 1

2007-03-02 07:45:27 · 8 answers · asked by Anonymous

for a rc car....what ohm

2007-03-02 07:40:19 · 5 answers · asked by swamp606887 2

2007-03-02 06:58:27 · 1 answers · asked by Anonymous

2007-03-02 06:12:19 · 5 answers · asked by Thomas C 1

hi,
If i have a 12V 10Ah lead acid battery,what does 10Ah stands for...
Does it mean an average of 10Amps of current supplied for an hour, or the time taken for a full 10Amps supplied.
If i have a dc electric motor(12V 10A) would this battery go well with it?

2007-03-02 06:03:21 · 7 answers · asked by eddy1234 1

2007-03-02 05:35:55 · 3 answers · asked by chipdiplady 2

I need help with finding different material to package my egg in

there is no
-Commercial products (Cans,jars,etc.)
-bubble wrap
-sponges


and is HAS to be very creatative...

2007-03-02 05:14:12 · 5 answers · asked by londonxhope 1

2007-03-02 05:12:17 · 4 answers · asked by arjun g 1

i need to vary the speed of a 12vdc 5amp dc motor to match it up to another motor. It does not need to be accurate just eye balling the speed but i need to be able to change the speed or voltage (which is the same thing) can someone reccomend a part number or product that can do this, i dont know anything about electronics, i just need to know what to buy.

2007-03-02 04:45:09 · 6 answers · asked by Robbie D 1

2007-03-02 04:35:53 · 9 answers · asked by Morey000 7

A ladder 10 ft long rests against
a vertical wall. If the bottom of
the ladder slides away from the
wall at 1ft/sec, how fast is
the top of the ladder sliding down
the wall when the -bottom of the
ladder is 6ft from the wall?

2007-03-02 04:20:28 · 1 answers · asked by Jacques C 2

2007-03-02 04:19:48 · 2 answers · asked by Anonymous

This question is concerned with calculating the work required to stretch a spring.
A certain 'engineering' spring does not obey Hooke's law. Instead, the tension T in the spring when it is extended a distance x beyond its natural length is given by ;

T=sqrt(5x+11) - sqrt(11)

Find the work done in stretching the spring from x = 14 to x = 19

2007-03-02 04:06:12 · 3 answers · asked by ozi 1

Task.
Describe this system with respect to the concepts of, information theory, source coding, channel parameters .Your description should contain numerical values of relevant information measures, noise parameters, signal parameters and, relevant symbol rates and bit rates. Use diagrams where appropriate.
Make any recommendations as to how you could improve the performance of the system with respect to your findings. Indicate any disadvantages that may accompany your recommendation. Justify your recommendation with appropriate analysis and/or any reference(s) you may have used.

2007-03-02 03:58:11 · 1 answers · asked by Anonymous

Introduction
A part of a communication system is composed of a discrete source generator, a source encoder and a noisy channel
Description of components.
Source.
This is a discrete source that generates three symbols A, B, and C contiguously.
A sample of 1000 symbols was taken over a period of 1000 s and the following noted during this period:
symbol A occurred 600 times.
symbol B occurred 300 times.
symbol C occurred 100 times.
Source encoder.
This source encodes the symbols using Huffman encoding or block to block encoding.
Modulator.
Here the source encoded symbols are turned into binary symbols using 5V unipolar non return to zero rectangular pulses (TTL) and then sent over the channel.
Channel.
The channel is a binary symmetric channel is linear, has infinite bandwidth and adds noise. During tests on the channel binary data was transmitted at 1 Mbit/s for 1 hour where it was found that 1.8108 bits were incorrectly received.

2007-03-02 03:55:31 · 1 answers · asked by Anonymous

Why are all high pass filters band pass filters and how do you calculate the corresponding Q and the -3dB point for the pper frequency limit.

Also if you are troubleshooting an active filter what is the best indication that F_o is a compnent fault

2007-03-02 03:39:21 · 3 answers · asked by Martin W 1

2007-03-02 03:30:09 · 8 answers · asked by SweetPea 3

rcfilter-r-2koms c-0.001microF whot is cut-off frequency?

2007-03-02 03:23:41 · 3 answers · asked by martin s 1

2007-03-02 02:49:45 · 1 answers · asked by sshashis 1