What is the rate of heat transfer from the balls to the oil

Assignment Help Mechanical Engineering

Reference no: EM13712320

1. A piston-cylinder device contains 3 kg of air at 300 kPa and 25°C. During a quasi-equilibrium isothermal expansion process, 20 kJ of boundary work is done by the system, and 8 kJ of paddle-wheel work is done on the system. What is the heat transfer during this process?

2. Steel balls at 150°C with a specific heat of 0.50 kJ/kg.°C are quenched in an oil bath to an average temperature of 70°C at a rate of 15 balls per minute. If the average mass of steel balls is 1.2 kg, what is the rate of heat transfer from the balls to the oil?

3. Steam is accelerated by a nozzle steadily from a low velocity to a velocity of 220 m/s at a rate of 1.2 kg/s. If the steam at the nozzle exit is at 300°C and 2 MPa, what is the exit area of the nozzle?

Reference no: EM13712320

Questions Cloud

Silicone rubber has a poissons ratio : Silicone rubber has a Poisson’s ratio of 0.4 Consider a silicone rubber drain hose for a surgical procedure. The hose has an outer diameter of 4mm and a wall thickness of 0.5mm. How much does the lumen of the catheter constrict if the hose is stretch..

What causes osmotic pressure to increase : What causes osmotic pressure to increase? what is the difference between 1 mol and molality? between 1 mole of NaCl and 1 mole of sucrose? what is the difference between these properties in a solution?

Transparent-film-type heating element to its inner surface : The rear window of an automobile is defogged by attaching a thin, transparent, film-type heating element to its inner surface. By electrically heating this element, a uniform heat flux may be established at the inner surface. The interior air tempera..

Memorizing vsepr molecular shapes and drawing : Memorizing VSEPR molecular shapes and drawing them.also i want to know how to determine if a compound is polar or nonpolar can u also tell me how to draw lewis structures for propyne butane ethene, and 2-methylhexane please also help me draw ethano..

What is the rate of heat transfer from the balls to the oil : Steel balls at 150°C with a specific heat of 0.50 kJ/kg.°C are quenched in an oil bath to an average temperature of 70°C at a rate of 15 balls per minute. If the average mass of steel balls is 1.2 kg, what is the rate of heat transfer from the balls ..

Determine the mach number at the exit : Nitrogen flows through a converging-diverging nozzle designed to operate at a Mach number of 3.0. It it is subjected to an operating pressure ratio of 0.5: Determine the Mach number at the exit.

Explain what metrics should be used to assess : Identify some of the logistics activities that the business engages in and explain what metrics should be used to assess how effective the logistics function is that would be important to customers.

Consider a sealed can that is filled with refrigerant : A 0.2-m3 rigid tank contains 8 kg of water (in any phase or phases) at 500 kPa. What is the temperature in the tank? Consider a sealed can that is filled with refrigerant-134a at 20°C. Now a leak develops, and the pressure in the can drops to the loc..

Find the minimum allowable cooling time in the water : Ball bearings of plain carbon steel are to be hardened by quenching them in a water bath at a temperature of 37oC. You are asked to devise a continuous process in which the ball could roll from a soaking oven at a uniform temperature of 870oC into th..

User Account

All Pages