A system undergoes a cycle consisting of four processes. In the first it receives 10 kw of heat and it does 4 kW of work in the second process. If the system rejects 5 kW of heat in the third process then the work done in the fourth process is given by which of the following? Select one: О а. 1 kw O b. 6 kW O c. 9 kW O d. 15 kW

A system undergoes a cycle consisting of four processes. In the first it receives 10 kw of heat and it does 4 kW of work in the second process. If the system rejects 5 kW of heat in the third process then the work done in the fourth process is given by which of the following? Select one: О а. 1 kw O b. 6 kW O c. 9 kW O d. 15 kW

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Ice is added to hot tea in a thermos and then, the thermos is closed. The energy loses through the thermos lid and walls are negligible. When the system including ice and water reached thermal equilibrium, the energy of ice increased by 10 J. How did the energy of water change? O Unknown O Did not change O Increased by 10J O Reduced by 10J
A machine does 9-kJ of work in 1 min. What is the power developed by the machine? A) 2000 Watts B 42 Watts C 21 Watts D 150 Watts
1. Determine the work done by 1-kg fluid system as it expands slowly within the piston-cylinder arrangement from an initial pressure and volume of 60 kPaa and 0.028 m3, respectively to a final volume of 0.123 m3 in accordance with the following relations: a) P=Cb) V=C c) pV = C d) pV^2 = C e) pV (InV) = c f) p = -3.9067V
You need an apartment for rent and as shown in the figure, you can see that the 3rd floors of each of the 2, 3 and 4 blocks of the buildings, whose front faces are adjacent, are for rent. You also learn that Block 2 is heated by a coal boiler operating at 75% efficiency, Block 3 is heated by a natural gas boiler operating at 92% efficiency and Block 4 is heated by a heat pump with a COP (coefficient Of Performance) of 4.5. We know that the heating process takes place uninterruptedly for 150 days, during these 150 days, the interior of the apartment remains constant at 22 °C. average outside temperature T∞ = 0 °C and average of wind speed u* = 5 m/s Find the total heating cost for all three blocks. The average heat transfer coefficient in apartment is h inside = 10 W/m2K thermal resistance of the wall Rwall = 1 m2K/W Assume that heat is lost only from the front and back of the blocks. In addition, the electricity unit price of 0.71 $/kWh, natural gas unit price of 0.14 $ / kWh, unit…
Question No. 5 A man carrying a bag of mass 25 kg climbs up to a height of 10 m in 50 s. The power delivered by him to the bag is [Take g 9.8 m/s ] O64 W O36 W O49 W 23 W
2) The energy consumed by a shower for 30 days is 22kwh. It is known that the resistance of the showerhead is 20 ohms and that its nominal current is 15A. So, what is the time in minutes that the shower was turned on during this period?
1. Is it Worth IT? I am considering purchasing a cover for my swimming pool. I have estimated that my pool loses 1.5 in of water off of its 1200 ft² surface each week due to evaporation. The cost of energy to heat the pool averages about $10.00 per million Btu. Interestingly, the salesperson at the pool store claims that a $500 pool cover will reduce evaporative losses by two-thirds and, as such, will pay for itself in one 15-week swimming season. Is it worth it for me to purchase this pool cover? You can assume that the heat of vaporization for water at my pool's average temperature equals 1050 Btu/lb.
a) A fan is installed in a residential building to provide proper ventilation. This fan is connected to a duct with 11.6 cm diameter and provides the average air velocity of 5 m/s. By regulation, the minimum fresh air requirement is specified to be 0.35 air changes per hour (ACH) which means 35% of the entire air contained in a room should be replaced by fresh outdoor air every hour. Determine: House 0.35 ACH 200 m² Figure Q2a i. The flow capacity of the fan in litres/min ii. What the height of the residential building should be.
An electric home stove with 3 burners and microwave is used in preparing a meal asfollows. Burner 1: 20 minutes Burner 2: 40 minutes Burner 3: 15 minutes . Microwave: 30minutes. If each burner is rated at 1.2 kW and the oven at 1.8 kW, and electricity costs 1000(IQ =Iraqi Dinar) per k Wh, calculate the cost of electricity used in preparing the meal?
A canister of sevoflurane, an inhaled anesthetic, is warmed to room temperature over the course of 30 minutes. As the gas warms, it pushes on a movable piston with a force of 623 mN, increasing the volume of the gas by 16 cm^3. How much work was done by the gas? A. 0.03 CJ B. 0.27 CJ C. 2.7 CJ D. 270 CJ
A movable piston compresses a gas in a cylinder to a volume half that of its original volume. The gas lost 300 KJ of heat during the process, but the internal energy value is zero. What is the work done on the gas? Select one: O a. 150 KJ O b. 100 KJ O c. 300 KJ O d. 200 KJ
Please consider an electric motor (the system) in steady operation in an environment with T = 24 •C. The motor draws 1 kW of electrical power and produces 1 hp of mechanical horse power. a. Please determine Q in Wat. b. Please determine Šc in Watt/ K. 1.