I need electricity advice. I'm wiring in a new ceiling fixture. The fixture has a green ground wire, and the existing box and support has a green ground wire wired to a green grounding screw. I cannot, to save my life, make the fixture's grounding wire stay under the damn green screw. This is mostly due to the laughable statement, "attach grounding wire to grounding screw while holding the fixture in your other hand." Can I just put the two green wires together with a wire nut?

Can I just put the two green wires together with a wire nut?

Yes. As long as the ground eventually connects to the box, you'll be shock free.

Also, be sure to cut the red wi-- no, the green one!!

Sorry....

I think that every time I wire something.

I'm going to work under the assumption that the green wire is grounded to something, because it's called "grounding wire." I realize that logic is a way of going wrong with confidence.

Do you know what "sheets" are on a sailing ship?

Nope, not the sails. The ropes.

(punctuation oopsie)

Since wiring isn't leaning so much on hundreds of years of tradition and barrels of rum, I'm hoping it's a bit more literal. I'm sure there's some rum involved, but I generally associate drinking with roofers.

Nope, not the sails. The ropes.

Some of the ropes, the ones that actually control the sails.

Some of the ropes, the ones that actually control the sails.

I had a feeling I wasn't being precise enough.

Also, this is where the expression "three sheets to the wind" comes from. But I forget what exactly that means.

IONonComputerN, The Most Powerful Diesel Engine in the World!

The cylinder bore is just under 38" and the stroke is just over 98". Each cylinder displaces 111,143 cubic inches (1820 liters) and produces 7780 horsepower. Total displacement comes out to 1,556,002 cubic inches (25,480 liters) for the fourteen cylinder version.

Damn.

To me, this is the most amazing part:

At maximum economy the engine exceeds 50% thermal efficiency. That is, more than 50% of the energy in the fuel in converted to motion.

For comparison, most automotive and small aircraft engines have BSFC figures in the 0.40-0.60 lbs/hp/hr range and 25-30% thermal efficiency range.

So it's about twice as efficient as a car engine. I'm guessing most all this efficiency comes from its size (as well as it being a two-stroke diesel).

Also, this is where the expression "three sheets to the wind" comes from. But I forget what exactly that means.

Square rigged sails are held by four sheets, one at each corner. If you untie three of them, the sail just flops around in all directions.

Does anyone have any good beginner tutorial sites for PHP that they can recommend?