The viscosity of a fluid is to be measured by an viscometer constructed of two 75-cm-long concentric cylinders. the outer diameter of the inner cylinder is 15 cm, and the gap between the two cylinders is 1 mm. the inner cylinder is rotated at 300 rpm, and the torque is measured to be 0.8 n·m. determine the viscosity of the fluid.

Viscosity of the fluid is

Explanation:

Given

The Area is given by

The velocity of the layer is layer is given by

Force acting by one layer of the fluid to other is given by F

Now from the Law of viscosity we have

Hence the viscosity of the fluid is

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )