Refrigerant 134a enters a horizontal pipe operating at steady state at 50°C, 450 kPa and a velocity of 46.1 m/s. At the exit, the temperature is 60 °C and the pressure is 220 kPa. The pipe diameter is 0.04 m. Determine the rate of heat transfer between the pipe and its surroundings, in kW.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

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

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