A2.5 cm diameter horizontal water jet with a speed of vi- 40 m/s relative to the ground is deflected by a 60° stationary cone whose base diameter is 25 cm. water velocity along the cone varies linearly from zero at the cone surface to the incoming jet speed of 40 m/s at the free surface. disregarding the effect of gravity and the shear forces, determine the horizontal force f needed to hold the cone stationary.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.

The process in which the system pressure remain constant is called a)-isobaric b)-isochoric c)-isolated d)-isothermal