Marble and viscosity experiment question asap

AFTER you've done your research and concluded your experiments, it is time to prepare for the science fair. Ask specific questions about preparing for a science fair, including how to set up your display board, how to prepare a presentation, etc. (Please post questions about selecting a project or conducting your experiment by posting in the appropriate "area of science" forum.)

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Ton2ley
Posts: 1
Joined: Wed Jan 14, 2015 4:58 pm
Occupation: Student
Project Question: Race your marbles to discover liquid viscosity
Project Due Date: 1/15/15
Project Status: I am finished with my experiment and analyzing the data

Marble and viscosity experiment question asap

Post by Ton2ley »

Explain the equation in this experiment viscosity =2deltaPga^2/9v and should the answer be close to the viscosity of the liquids used or will the answer vary? Thanks. Please respond quickly.
tdaly
Former Expert
Posts: 1415
Joined: Sat Nov 08, 2003 11:27 pm
Occupation: Planetary Scientist
Project Question: N/A
Project Due Date: N/A
Project Status: Not applicable

Re: Marble and viscosity experiment question asap

Post by tdaly »

Hi Ton2ley,

I'm not sure I understand your question. The equation you reference calculates the viscosity of the liquid the marble is falling through. If you do your experiment well, then the viscosity you calculate for water (for example) should be close to the actual viscosity of water. Make sure you are comparing values that have the same units!

If this doesn't answer you question, please post back with some additional details about what you are unsure about.
All the best,
Terik
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