Engineering

What trace spacing and width I should use in this circuit

I am makeing a PCB and I want to use 120VAC and .2A on half the circuit, and 5VDC and 1A on the other half.What spacing and width should I use on this circuit?I was thinking a 6mm spacing on the AC tr

RC Circuits and physics

A 47 micro farad capacitor is placed in series with a resistor.If the capacitor is to charge up to 50% of its maximum charge in 1 second, how big of a resistor do we want? Someone Please Help Me with

RLC circuti Problem (Electronics Engineering )

if R L C are connected in Series if Vi = 100V, XL = 100 ohm, and XC is also 100 ohm and R = 1K ohm then At resonance condition what will be the voltage drop across each components, specially across L

Power Factor and armature current calculation

1)A 10kW, 240V, 50Hz single phase cage rotor induction motor is 85% efficient and has a PF of 0.68 lagging. Calculate the moto current and the value ofcapacitor required to raise the PF to 0.93 2)) A

How many houses in a year could 80 megawatts-peak power

I need to know for a physics paper on solar power.-Thats 80,000 kilowatts. Long ago we figured 80,000 houses. More recently 67,000 or 57,000, as houses are bigger and we tend to be more wasteful. That

Body building help..

Im 14, and I want to start Lifting weights and such. What should I work out each day? And I need some tips on benching and increasing it. Anything will help, thanks.-bodybuilding.com is a great place

How much would it cost to build this small house

Please figure in the building materials, wiring, flooring (hardwood/ laminate), appliances etc. Square Feet262 Bedrooms1 Baths1 Garage Stalls1 Levels2 Width16 Depth19 http://img2.houseplans.com/pla

How to amplify signal several times with op-amp

For example, a question asked to design an op-amp circuit to amplify the signal 10 times. Let say that Im using a non-inverting amplifier to do this, now how do I amplify the signal 10 times? Steps mi

Where can I get a transformer (electronics)

Im looking for a transformer that will give a shock. Nothing harmful. There are squirrels on my bird feeder, and they are very annoying. I want to make a shocker to scare the squirrels away. My desi

Thevenin Resistance Problem

Hi, Can anybody please tell me how to find the Thevenin Resistance in this circuit.. Thank you! http://img832.imageshack.us/i/theveninpr…-It is not 16.67 sorry, Replace the source with the ideal in

Derivatives for centigrade

From 1744 until 1954, 0 °Centigrade was defined as the freezing point of water and 100 °Centigrade was defined as the boiling point of water., There are 100 degrees in that scale between those two bas

How to calculate the back e.m.f and new armature current in the following question

A 440V d.c. shunt-wound motor has a field resistance of 200 and an armature resistance of 0.6When its speed is 20revs/second the current drawn from the supply is 12.2A. Calculate its back e.m.f. at th

Why do silencers make bullets weaker and not stronger

Sound is energy and the bullet is using energy to leave its chamber, so why does severely decreasing the sound not give the bullet more energy/ speed instead of decreasing its speed/ energy?-Well, the

What is i^76 + i^9 - i^3

1 - i -(-i) 1 - i + i 1-the answer is 1+2i i^76=1 i^9=i i^3=-i So combining this, we get 1+2i

Mechanical engineering DWI

i got a dwi about 2 years ago. Ive been working my way through college towards a BSME degree. I hopefully will have it in two more years. Im at the point though that i will transfer to a 4 year school