The center of (it's) gravity

The optimum location varies according with different eclipses.

You could calculate it as an integral function in calculus to maximize the desired outcome or product - what have you.

Personally, I think it's just another way of saying best, unless your seriously referring to integral functions.

You can obtain a splitter to allow you to be able to have cable on more than one tv. Optimum cable can be transferred to other tvs by use of a splitter that you can purchase at a location such as Best Buy.

Ideally, sweet onions should be stored in a cool, dark, dry location and spread out for optimum air circulation.