Question Solved1 Answer Quiz 1: A heat pump unit is used to heat water for a hot-water supply. Assume that the unit uses R-22 and operates on the ideal vapor compression cycle. The evaporator temperature is 10 °C and the condenser temperature is 60 °C. If the amount of hot water needed is 4.8 kg/min, the water temperature should be increased from 20 to 45 °C, and the value of Cp for water is 4.18 kJ/kg.K, determine the COP of the heat pump and amount of energy saved by using the heat pump instead of directly heating water using an electric heater.

The following panel has a length (L) and width (W), is lightweight and is expected to be stiff. F W a) You are required to identify the Objectives, Constraints and Free Variables and then obtain the material index. Once the material index is obtained, you are required to comment on “how the performance could be improved with respect to material properties”. The following panel has a length (L) and width (W), is lightweight and is expected to be stiff. F W a) You are required to identify the Objectives, Constraints and Free Variables and then obtain the material index. Once the material index is obtained, you are required to comment on “how the performance could be improved with respect to material properties”. b) If we specify that the material of your choice should have a modulus of elasticity in excess of 70 GPa, use the following Ashby chart to identify the most likely materials that can be used to make the panel. c) If in addition the selected materials must have adequate resistance to brittle fracture, and therefore a minimum plane strain fracture toughness value of 20 MPa.m\?. Use your Lecture notes for charts related to fracture toughness to further refine your choices of materials identified in b) above, for the panel. 1000 W alloys. 100 ALLO Steels Technical Young's modulus - Density SIC Ti alloys Ni alloys WO ceramics SIN B. Search Al alloys region Composites CFRP Glass Cu alloys Bamboo. Mg alloys GFRP Metals Wood // grain PMMA Lead alloys Longitudinal Concrete Natural PA Zinc alloys PEEK wave spood materials PS PET. Nontechnical 10 m/s Wood Epoxies ceramics I grain PC PP Rigid polymor Leather PE O PTFE foams Polymers Polyester 10 Young's modulus E (GPa) 3 E12 10-1 Foams 10 m/s. EVA 10-2 Silicone elastomers Polyurethane Cork Isoprene Guide lines for minimum mass design Neoprenó 10-3 Flexiblo polymer foams Buty rubber Elastomers 10 m/s MFA, 00 104 10 100 10,000 1000 Density p (kg/m)

Air at 80 degrees Fahrenheit and 14.7 psia with a mass flow rate of 0.6 lbm/sec enters a compressor and leaves at 70 psia and 430 degrees Fahrenheit through an exit area of 0.007 ft^2.  The measured heat interaction rate with the 80 degree Fahrenheit factory room is 3 Btu/sec.  Use constant Cp = 0.24 Btu/lbm oF a) Calculate the compressor work rate.   b) Compute the entropy generation rate for the overall process.  

1 Required information A 20-mm-diameter rod made of the same material as rods AC and AD in the truss shown was tested to failure and an ultimate load of 105 kN was recorded. Use a factor of safety of 3.0. Part 1 of 2 1,5 m D B 3 m -3 m 48 kN 48 kN Determine the required diameter of rod AC. The required diameter of rod AC is mm.

Required information A 20-mm-diameter rod made of the same material as rods AC and AD in the truss shown was tested to failure and an ultimate load of 125 kN was recorded. Use a factor of safety of 3.0. 1.5 m 3 m 48 KN 48 KN Determine the required diameter of rod AC. The required diameter of rod AC is mm

thermo 2 help plz Air, at \( 80^{\circ} \mathrm{F} \) and \( 14.7 \) psia with a mass flow rate of \( 0.6 \mathrm{Ibrm} / \mathrm{sec} \) enters a compressor and leaves at 70 psia and \( 430^{\circ} \) F through an exit of area 0007 . th \( ^{2} \). The measured heat internction rate with the \( 80^{\circ} \mathrm{F} \) factory room is \( ₹ \mathrm{Bth} / \mathrm{sec} \). Use constant \( \mathrm{C}_{p}=0.24 \mathrm{Btw}_{\mathrm{f}} \mathrm{b}_{\mathrm{m}}{ }^{\circ \mathrm{F}} \) a. Calculate the compressor work rate, W. b. Compute the entropy generation rate for the overall process.

Required information Problem 15-4A (Algo) Preparing job cost sheets, recording costs, preparing inventory ledger accounts LO P1, P2, P3 [The following information applies to the questions displayed below] Watercraft's predetermined overhead rate is 200% of direct labor. Information on the company's production activities during May follows. a. Purchased raw Required information Problem 15-4A (Algo) Preparing job cost sheets, recording costs, preparing inventory ledger accounts LO P1, P2, P3 [The following information applies to the questions displayed below] Watercraft's predetermined overhead rate is 200% of direct labor. Information on the company's production activities during May follows. a. Purchased raw materials on credit, $220,000 b. Materials requisitions record use of the following materials for the month. Job 136 Job 137 Job 138 Job 139 Job 140 Total direct materials Indirect materials Total materials requisitions Job 136 Job 137 30h 138 300 119 $ 49,500 32,500 19,400 c. Time tickets record use of the following labor for the month. These wages were paid in cash Job 140 Total direct labor Indirect labor Total labor cost 23,200 6,400 131,000 20,500 $ 151,500 $ 12,300 10,500 37,900 39,200 4,000 101,900 14,500 $ 128,400 Journal entry worksheet < 3 Record raw material purchases on credit. Note: Enter debits before credits. Transaction Record entry 4 Raw materials inventory Accounts payable General Journal 5 Clear entry 6 7 8 Debit 220,000 ***** Credit 11 220,000 View general journal >