A 20-cm diameter copper ball is to be heated from 110°C to an average temperature of 170°C in 90 minutes. Taking the averagedensity and specific heat of copper in this temperature range to be p=8950 kg/m and Cp=0.395 kJ/kg • °C, respectively,determine the total amount of heat transfer to the copper ball in kj (Area of sphere: TID2; Volume of sphere=TTD/6)?A88.64 kJB886.4 kl78.84 kJD788.4 kJ

Answered: Image /qna-images/answer/d8c1b270-ff48-44b7-b8ca-4bf5e31ffa8b.jpg

A 20-cm diameter copper ball is to be heated from 110°C to an average temperature of 170°C in 90 minutes. Taking the average density and specific heat of copper in this temperature range to be p=8950 kg/m and Cp-D0.395 kJ/kg • °C, respectively, determine the total amount of heat transfer to the copper ball in kj (Area of sphere: TID2; Volume of sphere-TD%6)? A 88.64 kJ B 886.4 k 78.84 kJ 788.4 kJ

A 20-cm diameter copper ball is to be heated from 110°C to an average temperature of 170°C in 90 minutes. Taking the average density and specific heat of copper in this temperature range to be p=8950 kg/m and Cp-D0.395 kJ/kg • °C, respectively, determine the total amount of heat transfer to the copper ball in kj (Area of sphere: TID2; Volume of sphere-TD%6)? A 88.64 kJ B 886.4 k 78.84 kJ 788.4 kJ

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

In an exothermic process, the volume of a system expanded from 213 mL to 2135 mL against a constant pressure of 752 torr. During the process, 29.1 calories of heat energy were given off. What was the internal energy change for the system in joules?
169 g of solid water (i.e. ice), at -17 °C, is placed into a sealed, insulated container with a volume of 0.29 m^3. A 1457 W heater is used to heat and change the phase of the sample until it is a gaseous water (i.e. steam). The heater runs for 433 s. What is the pressure, in kPa, of the gaseous water in the container at the end of the heating process? Round your answer to the first decimal place.
The density of a fluid decreases by 5 percent at constant pressure when its temperature increases by 10°C. The coefficient of volume expansion of this fluid is
A tank of air is expanded via heat transfer at a constant pressure such that its volume is 2.5 times its original volume. If the initial temperature of the tank was 23 Celsius, what is the amount of heat transfer required for this process in kJ/kg? Calculate this with the following 3 approaches: Constant Specific Heats (use the average temp) The equation as seen on table A-2 Air property tables
Calculate the quantity of heat to be transferred in BTU to 3 kg of brass to raise its temperature from 26.7°C to 239.9°C The specific heat of the brass is 0.394 kJ/kg k. answer in 3 decimal places.
2.8 kg of air is inside a closed, rigid tank as shown. Initially the air is at a pressure of 2.2 bar and a temperature of 29°C. The air undergoes a process to a final temperature of 130°C. What is the heat transfer to the system? Express the answer in kJ. rigid tank Air System boundary
Determine the quantity (volume) of saline water in a steam generator. The heat energy of 1527 kJ is supplied to saline water in the steam generator to heat from 21°C to 101°C for the generation of water vapor, Take the density & specific heat of the solution as 1014 kg/m³ & 3.3 J/kg°K respectively. Solution: Change in Temperature (in K) Mass of the saltwater (in kg) Quantity (Volume) of saltwater (in m)
Newton's Law of Cooling says that the rate at which a body cools is proportional to the differnce C in temperature between the body and the environment around it. The temperature f(t) of the body at time t in hours after being introduced into an environment having constant temperature T0 is f(t)=T0+Ce-kt, where C and k are constants.A pot of coffee with initial tempature of 100°C is set down in a room with a tempature of 20°C.The coffee cools to 60°C after 1 hour. A)Write an equation to model the data. B)Find the tempature after half an hour. C)How long will it take for the coffee to cool at 50°C
Air at 27 Celsius degree receives heat at a constant volume until its temperature reaches 927 Celsuis degree. determine the heat added per kelogram?
The radiator of a steam heating system has a volume of 56 dm3 and uses dry saturated steam at a temperature of 160°C. By perfectly closing the inlet and outlet valves on the radiator, the temperature of the trapped steam decreases to an ambient temperature of 20°C as a result of heat transfer to the environment.a) Determine the mass of vapor trapped in the radiator.b) Determine the quality of the steam when the temperature is 20°C.c) Calculate the vapor pressure when the temperature is 20°C
Propane (MW = 44 ; k = 1.13) initially at 30 psia and 215°F, is stored inside a large spherical vessel having a diameter of 10 ft. If the temperature is increased to 635°F. Determine the following: a. Final pressure in psi b. Mass of propane in Ibm c. Constant Volume Specific heat in BTU/lbm d. Change in Internal Energy, AUU in BTU
Air is contained in a piston cylinder arrangement as shown in Fig. The piston can be assumed to be massless, frictionless, and perfectly insulated. 10 kg of dry ice (solid CO2) is placed on top of the piston. The initial conditions for air inside the cylinder are Pı=121 kPa, Tı= 300 K. Dry ice sublimates gradually, and its mass reduces to 5 kg. Ambient air is always at room temperature (27°C) and atmospheric pressure. (Given: R=287 J/kg ·K, g = 9.8 m/s², Cp/Cy for air = 1.4; Neglect all heat transfer to the dry ice block.) a) Assuming the cylinder to be perfectly insulated, calculate the specific work done for the process. b) Assuming the cylinder to be perfectly conducting, what is the heat required per unit mass of air to complete the process? c) Plot the processes described in (a) and (b) together on a P- v diagram. From this plot, which process appears to have more work? Explain.