Mike Sloan

Science Fair Experiment

PURPOSE:

In the Feburary issue of SURFER magazine a man wrote in that temperature of water makes a big enough difference in viscosity that when you are in the water you can feel the differences yourself. On colder days surf is slower and more powerfull due to its "surupy" thickness is what his reasearch told him.

Does water temperature make a big enough difference in viscosity for us to be able to tell?

 

HYPOTHESIS:

One can tell the difference due to the fact it is at least 25% thicker on the coldest day than on the hottest which is about the lowest a person can tell with ease.

 

MATERIALS:

Ocean Water

Thurmos(s)

Heating Pan

Plastic Pipe (6ft. 1.5in diameter)

Glass Strips

Photogates

Thermometer

PC

Puck shaped weight

Duct Tape

Epoxy

Science workshop and interface

PROCEDURE:

VISCOMETER AND PC SETUP

VISCOMETER

1. Epoxy the pipe to a glass base (a beker).

2. Put the pipe in an upright position (beker will give a right angle to the base and pipe).

3. Duct tape photogate onto the pipe six inches from each end.

PC

1. Navigate self to the PASCO home screen.

2. Plug in both photogates.

3. Set to: Two photogates (in flight)

4. Set to: Table

5. Set decimal to space desired (four spaces).

6. Plug in thermometer.

 

EXPEREMENT:

*1. Take enough ocean water to fill your pipe in tightly capped thermoses from the ocean(go out close to the waves).

2. Pour ocean water into a hot pan and leave a thermometer in the water. Stop heating at 25.7 degrees celcius.

3. Pour the heated ocean water into the pipe till it reaches the top.

4. Put in the thermometer to check the temp. and drop the marble into the water.

5. Re-test at 30.7, 35.7, and 40.7 degrees celcius

6. Recording of data will simultaniously be done by the computer.

*Any step with ocean water should be done with care not to contaminate the water since later testing is extremely precise.