Water at 310 k and a flow rate of 4 kg/s enters an alumina tube (k=177wm k1) with an inner diameter of 0.20 m and a wall thickness of 0.02 m. air at a temperature of 390 k flows over the tube, heating it. the convection coefficients of for the water and air are 150 and 30 w m2 k-1, respectively.

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.