The refrigerant enters the evaporator at -30 °C with a quality of 34% and leaves the compressor at 40 °C. If the compressor consumes 450 Watts of power, establish an engineering model for this problem and determine the mass flow rate of the refrigerant as well as the coefficient of performance of the refrigerator.

A casting made of cast iron weighs 4.7 kg. The riser and gating system add another 2.5 kg to the total metal poured during the operation. The melting temperature of this grade of cast iron = 1180°C, its density = 7.6 g/cm3, specific heat = 0.46 J/g°C, and heat of fusion = 126 J/g.  Assume that the specific heat has the same value for solid and molten metal. Compute (a) the unit energy for melting and pouring and (b) the total energy to heat the metal to a pouring temperature of 1300°C from a starting temperature of 25°C. (c) What is the volume of the casting?

⦁ Write your answers to the following blanks.The Charpy impact experiment is through the process of obtaining the energy of the material ② by using the difference in ① energy before and after the impact. ② The lower the energy, the ③ behaves, and the higher the ④, the more it is destroyed.

Need help on part A,C,and D engineering of materials Part C - Angle of twist of B with respect to E Determine the angle of twist of B with respect to E. Express your answer to four significant figures and include the appropriate units.         ϕB/E =     Part D - Angle of twist of A with respect to F Determine the angle of twist of A with respect to F. Express your answer in radians to four significant figures.               ϕA/F =