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When specifying a natural gas line, what do you need to call out

I am a practicing electrical engineer in the power industry.Recently at a kickoff meeting, another engineer mentioned that there was the need to bring in a natural gas line at 2-5psi and 4,000,000 Btu

What are four factors that affect the resistance in an electrical wire

1. What its made of..eg copper, gold 2. Cross section (diameter) 3. Length 4. Loops, bends, nicks bonus :5. Temperature-1 material - Copper will have less resistant than steel. 2 length - Longer wire

Archimedes Principle

Can someone please explain his principle in a way that a 10 yrs old can understand?-Please specify if for gears, pulleys, levers, volumetric displacement, etc Archimides had much to say about everythi

What is the time constant of this RL circuit? quick 10 points here

Consider the RL circuit in the diagram below with the following component values.R = 117 ohmsL = 328 millihenries and Vs undergoes a step change at t=0 Vs(t) = 0 volts for tVs(t) = 6 volts for t>0 W

What are similarities of hydraulic and pneumatic systems

Both are similar in that they both use a fluid pressure to do work. However where oils (or water) are nearly incompressible and will transmit forces very similar to what is applied, the compressibilit

Matlab how to plot from the origin to a point (x,y)

Hi all, I have a graph of points using plot(p1x,p1y,X) hold on; plot(p2x,p2y,X) plot(p3x,p3y,X) plot(p4x,p4y,X) hold off; title() xlabel() ylabel() grid but i want to have a line from (0,0) to the

9, a[2], a[3], 8/3 Geometric series find a[2] and a[3]

show work-9 x d^3 = 8/3 d^3 = 8/27 ......d = 2/3 series is 9, 6, 4, 8/3....

What is the price of an ounce of Osmium? What is the price of an ounce of Iridium

Please measure price in USD-osmium costs about $400 per troy ounce, iridium costs about $700 an ounce

What is function of tuyere in blast furnace

A tuyere is a tube, nozzle or pipe through which air is blown into a furnace or hearth.[1] Air or oxygen is injected into a hearth under pressure from bellows or a blast engine or other devices. This

How to check range of a variable capacitor

I have a bunch of variable air capacitors. I want to find out how I can figure out their range. I think if I measure the plates, spacing, and amount of plates, I can figure out the rating. Is there an

How does a lightening conductor work, what does it do

It allows a lightening strike to take an easy route to earth rather than causing damage or injury. It is made from a good conducting metal and can be found on tall buldings (quite often churches). The

Why use an entire PCB layer for a ground plane

Resistance to the positive side of the power supplies is not an issue with regular traces, so logically the same would be true of the ground side as well.Why use an entire plane for the ground supply

Help with research on perpetual motion

If I were to research on making a perpetual motion machine, which branch of physics should i mainly concentrate on?-You should research physics and thermodynamics, but both of those branches state tha

How to reduse pressure of a gas without effecting flow of pipeline 2000mm

We are treding on ground I know little about, but maybe the venturi principle... Make the pipe smaller, the flow will increase in speed, then lower the pressure until you return to normal.-In theory y

What is the most dense material know to Mankind (that you can buy)

Osmium or Iridium depending on who you believe. Osmium wins because the specific gravity of Iridium is very slightly lower than Osmium. Density, or volumic mass, is a measure of mass per unit of vol
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