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    Core practical 4 is determining the viscosity of a liquid by dropping a ball into the fluid.
    Our teacher told us to only use one ball bearing size and reading through the textbook afterwards, it says that I should have done the experiment with ball bearings of different diameters.
    Should I make up some results? Or should i write in my core practical book that i ran out of time to do different ball bearings? If I do the latter option, is my independent variable still the diamter of the ball bearing? Or is the independent variable nothing as I didn't change anything?
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Updated: October 17, 2015
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