A hollow spherical steel has an inner diameter of 30cm and outer diameter of 37cm. It is covered with insulation of 5cm thick. The inner surface of the steel is kept at a constant temperature of 100°C and outside insulation is 30°C. The thermalconductivity of the material is 0.65 W/m-k. By what percentage will the rate of loss be decreased if the thickness of the insulation is increased by 4cm?O a. 16.65%O b. 83.35%O c. 79.57%O d. 20.43%O e. None

A hollow spherical steel has an inner diameter of 30cm and outer diameter of 37cm. It is covered with insulation of 5cm thick. The conductivity of the material is 0.65 W/m-k. By what percentage will the rate of loss be decreased if the thickness of the insulation O a. 16.65% O b. 83.35% O c. 79.57% O d. 20.43% Oe. None inner surface of the steel is kept at a constant temperature of 100°C and outside insulation is 30°C. The then s increased by 4cm?

A hollow spherical steel has an inner diameter of 30cm and outer diameter of 37cm. It is covered with insulation of 5cm thick. The conductivity of the material is 0.65 W/m-k. By what percentage will the rate of loss be decreased if the thickness of the insulation O a. 16.65% O b. 83.35% O c. 79.57% O d. 20.43% Oe. None inner surface of the steel is kept at a constant temperature of 100°C and outside insulation is 30°C. The then s increased by 4cm?

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

Help asap
A 3000 N vehicle, shown in the figure, crosses a rough road at 120 km / h. The amplitude of the sine curve representing the path is 2.5 cm and the wavelength is 5 m. According to this; a) 120 km /h speed is the critical point where resonance occurs. Determine the spring constant (k) in case of velocity. b) Determine the spring constant of the spring that will give a vibration amplitude of 0.5 cm at a speed of 120 km / h.
Compare the different heat flux resulting from conduction through 1 in. of the follow·ing materials when subjected to a 30"F temperature difference: copper, steel, wood,glass fiber.
Question 1 The exterior wall of a building consists of 100 mm thick face brick (k = 0.9 W/m-K), 40 mm thick polystyrene insulating board (k = 0.036 W/m-K), 125 mm thick concrete block (k = 1.8 W/m-K) and 15 %3D mm thick interior gypsum board (k = 0.18 W/m-K). The inside and outside convective heat transfer coefficients are 6.5 W/m2-K and 22.5 W/m2-K, respectively. The outside air temperature is -5°C and the inside air temperature is 20°C. The wall is 3 m high and 15 m long. Calculate the rate of heat loss (in W) through the wall. Round your answer to 2 decimal places. Add your answer Follow-up question to Question 1, calculate the temperature (in °C) of the interior surface of the wall. Round your answer to 2 decimal places. Add your answer Follow-up question to Question 1, calculate the temperature (in °C) of the exterior surface of the wall. Round your answer to 2 decimal places. Add your answer
Define Heat conduction from warm air to a cold canned drink through the wall of the aluminum can.
Please answer the question and provide explanation why they are correct or incorrect.
Thermal Conductivity of Skin" Design experiments and calculate heat transfer coefficients/thermal conductivity (k)
why the resistance of small machine is greater than the resistance of the large machine??
Calculate the critical radius of insulation for asbestos (k=0.17 W/m.C) surrounding a pipe and exposed to room air at 17 C with h= 3 W/m².C. Calculate the heat loss from a 180 C, 3.5 cm diameter pipe when covered with the critical radius of insulation and without insulation.
105 W/m3 heat is uniformly generating within a 4 cm thick slab. The slab is exposed to ho = 10 W/m2K and To = 20 °C ambient conditions from its both sides. What is the surface temperature of the slab? A. 420 °C B. 200 °C C. 220 °C D. 100 °C
What is the thermal resistance of a 3 in fired clay brick with density of 120 Ibm/ft3 a. 0.422 b. 6.8 c. 0.48 d. 6.2
what id correct ans