In a series of observations on the displacement of rubber latex spheres of radius 0.212 urn, the
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In a series of observations on the displacement of rubber latex spheres of radius 0.212 urn, the mean square displacements after selected time intervals were on average as follows:
These results were originally used to find the value of Avogadro's constant, but there are now better ways of determining NA' so the data can be used to find another quantity. Find the effective viscosity of water at the temperature of this experiment (25°C).
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t/s 30 10¹²(x²)/m² 88.2 60 113.5 90 128 120 144
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x 2Dt 2183 D Hence n kT Da kTt 3x2 kT 6 206 105 Jm1 2167 ...View the full answer
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