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A steel ball of diameter 3.2 mm falls under gravity through an oil of density 920kg<img src="data:image/png;base64,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" class="Wirisformula" alt="straight m to the power of negative 3 end exponent" width="34" height="17" style="vertical-align:-1px" role="math" data-mathml='«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mi mathvariant=¨normal¨»m«/mi»«mrow»«mo»§#8722;«/mo»«mn»3«/mn»«/mrow»«/msup»«/math»'/> and viscosity  1.64Ns<img src="data:image/png;base64,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" class="Wirisformula" alt="straight m to the power of negative 2 end exponent" width="34" height="17" style="vertical-align:-1px" role="math" data-mathml='«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mi mathvariant=¨normal¨»m«/mi»«mrow»«mo»§#8722;«/mo»«mn»2«/mn»«/mrow»«/msup»«/math»'/>. The density of steel may be taken as7820kg<img src="data:image/png;base64,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" class="Wirisformula" alt="m to the power of negative 3 end exponent" width="35" height="17" style="vertical-align:-1px" role="math" data-mathml='«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msup»«mi»m«/mi»«mrow»«mo»§#8722;«/mo»«mn»3«/mn»«/mrow»«/msup»«/math»'/> What is the terminal velocity of the ball?

Solution for the question - a steel ball of diameter 3.2 mm falls under gravity through an oil ofdensity 920kg m^(-3) and viscosity 1.64ns m^(-2) . the density