Aviscometer may be created by using a pair of closely fitting concentric cylinders and filling the gap between the cylinder with the fluid whose viscosity will be measured. assuming that the velocity profile in the gap is linear, calculate coefficient of viscosity if inner diameter is 75mm, outer diameter is 75.04mm, torque is 0.021 n/m and w is 100 rpm.

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed