2. A disk rotates near a fixed surface. The radius of the disk is R, and the space between the disk and the surface is filled with a liquid of viscosity, u. The spacing between the disk and the surface is h, and the disk rotates at an angular speed w. Find the dependence between torque on the disk, T, and the other variables.

5.3 The surface of water at a certain point in the swimming pool has a temperature of 27 °C at the atmospheric pressure of 101,325 kPa. The temperature at the bottom of the swimming pool is 10 °C. An air bubble with a diameter of 10 mm is let loose from the bottom. Calculate the depth of the swimming pool if the bubble has a diameter of 20 mm when it reaches the surface. HINT: Calculate the difference in pressure at the top and the bottom, and then use the relevant formula to determine the depth. Density of water = 1 000 kg/m³ (6) [11] TOTAL: 70

A ship displaces 4000 cubic feet of sea water. Find the volume of water that the ship will displace in fresh water

Global warming will produce rising sea levels partly due to melting ice caps and partly due to the expansion of water as average ocean temperatures rise. To get some idea of the size of this effect, calculate the change in length, Ah (in mm), of a column of water 1.5 km high for a temperature increase of 1.2 °C.Assume the column is not free to expand sideways. As a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to the surface can expand sideways onto land, and only to a limited degree. As another approximation, neglect the fact that ocean warming is not uniform with depth. Properties of water: 3 = 210 x 10 /C. c= 4186 J/kg - °C, L; = 334 kJ/kg, Le = 2256 kJ/kg Enter you answer below (to the nearest mm): Ah (in mm) = Type your answer.

A rectangular tank 2m long, 1.5m wide and 1.5m deep is filled with oil of specific gravity 0.8. Find the force acting on the bottom of the tank when the vertical acceleration 5 m/s2 acts upwards.

questin 3a