Fuel Tank Design?
 

I am wondering where is the out take (place where the fuel exits the tank, and goes into the engine) on a fuel tank positioned? Are they located on the bottom front, bottom middle, bottom back...?

The reason why I ask was because I am wondering what happens when I don't have much gas left in my car and I am going up/down a steep road. Physics says that the fuel will stay perpendicular with the horizon, and so if I am going down a steep hill the fuel in the tank will be shifted to the front. If I don't have much fuel in the tank and the out take is positioned in the rear, then the engine won't get any fuel therefore die?

It's usually called the pick-up and the location depends on the car.

You should be more worried about the crap at the bottom of your tank getting picked up more than running out of fuel. If the tank is metal and you're constantly running it low, there's more room for condensation and rust.

Solution is simple - when you're at 1/4 tank (unless you're on a road trip), fill it up. You're going to put gas in there regardless.

Also, tanks often have baffles in them to keep fuel from sloshing around too much

Sounds great. Tnx

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the fuel lines (in and out) on a oem tank are on top of the tank or on the side near the top.
The supply and return are located on top and are generally 3/8 inch lines and are part of the sending unit most often referred to as the pickup. And the filler neck or tube is located on the side nearing the top.

The fuel sending unit operates by way of a float inside your tank...

And I somehow doubt uphill/downhill will give you anymore gas...although I'd suggest a downhill slope if you were spluttering ;)