The largest and the smallest balls used in the experiment are with diameter 9.52 mm, and 2.38 mm respectively. for a glycerin with viscosity 1.5 pa. s, what is the time necessary for each ball to rich a velocity 99% of the terminal velocity? density of the ball material is given in the text. round the result to three decimal places.

Answer

given,

largest diameter of  balls = 9.52 mm = 0.00476 m

                                 radius = 0.00476

smallest diameter of ball = 2.38 mm = 0.00238 m

                                 radius = 0.00119

viscosity = 1.5 Pa.s

density of the ball = 1.42 g/cm

for small balls

t = 0.033 ms

for larger ball

t = 0.531 ms

volts times amps 6 x 0.5 3w