In a heat treatment process, a 2-kg steel part that is initially at 1000 k, is quenched in a tank containing oil, initially at 300 k. there is negligible heat transfer between the contents of the tank and their surroundings. the steel part = 0.50 kj (kgk), = 8080 kg m3 ⁄ ⁄ ] and oil [cc = 1.95 kj (kgk), = 890 kg m3 ⁄ ⁄ ] can be modeled as incompressible substances

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise