How to find the volume of a cork?

AIM: to find the volume of a piece of cork.

APPARATIES: a displacement can, wooden block, beaker, measuring cylinder, sinker (ex. pebble) ,a piece of cork and piece of string.

ACTIVITY:

1. Set up the appartus.(put the displacement can on the wooden block and place the beaker close to the wooden block~under the displacement can's sprout~
2. Fill the displacement can with water and allow excess water to flow into the beaker.~discard this water, u don't need it~
3. Place the dry measuring cylinder directly below the sprout.
4. Tie the stone to the string and lower it carefully into the displacement can.
5. Allow the displaced water to collect in the measuring cylinder.
6. The amount of water collected is the volume of the stone. record it as VOLUME A.
7. Remove the stone from the displacement can and repeat steps 2 & 3.
8. Tie the cork on the same string you used to tie the stone and lower both of them carefully into the displacement can.
9. Allow the displaced water to collect in the measuring cylinder and record it as VOLUME B.
10. The difference between volumes A & B ,is the volume of the cork.

Reference: http://wiki.answers.com/Q/How_do_you_find_the_volume_of_an_irregular_shape_which_floats