That would be very difficult to determine. The experiment could never be set up and conducted, since there is no such thing as a "cubed square foot". If you meant to say cubic foot, then here is a way to determine it. You will need golf tees that will sink in water, plus a container holding 2 cubic feet, with a mark at the one cubic foot level. Fill the container with water to the one cubic foot level. Start dropping in the golf tees until the water level is at the top, or two cubic feet. Count how many golf tees you put into the container to get your answer.
Depends on the size of the golf tees.
18...people keep extra tees in their golf bags though...but there are 18 ON the golf field..as you call it.
There are a few stores that offer printing of personalized golf tees. One purchase personalized tees from 'The Golf Tee Store', 'Golf Tees Etc' and 'Golfers Shop Here'.
Golf tees are usually made of wood or plastic and are used to hold the golf ball stationary before the first shot is made. 3000 golf tees can be made from 1 tree trunk.
Yes, they are an accessory.