Problem 2 (7.5 points): consider a sphere with a diameter of 20mm and a surface temperature of 60◦c that is immersed in a fluid at a temperature of 30◦c and a velocity of 2.5m/s. calculate the drag force and the heat rate when the fluid is (a) water and (b) air at atmospheric pressure. explain why the results for the two fluids are so different.

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

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.

What is the main objective of using reheat rankine cycle?