3. Two parallel plates with a diameter of 60 cm, separated at a distance of 15 cm. The temperature on the top surface is 4 oC and the temperature on the bottom surface is 300 K. If all the surfaces are black, what is the rate of heat transfer?

3. Two parallel plates with a diameter of 60 cm, separated at a distance of 15 cm. The temperature on the top surface is 4 oC and the temperature on the bottom surface is 300 K. If all the surfaces are black, what is the rate of heat transfer?

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

Fast Please..
Earth absorbs solar energy and radiates infrared energy. The intensity of the solar radiation incident on earth is J = 1350 Wm-2, also known as the solar constant. Assume earth’s surface (ground) temperature to be uniform at Ts, and that the ground and atmosphere are black (emissivity = 1) for infrared radiation. The radius of the earth is 6.378 x 106 m. The diagram shows the ground at the surface temperature Ts and the atmosphere, represented as a thin black layer, at temperature Ta . Suppose the atmosphere absorbs 100% of the infrared radiation emitted by the ground. Assume that the ground absorbs 47.5% of the incident solar energy, and that the atmosphere absorbs 17.5% of the incident solar energy (for a total of 65% absorbed by the planet). Calculate the "steady state” numerical values of the earth’s ground temperature Ts and the atmospheric temperature Ta taking into account the “greenhouse effect” of atmospheric infrared absorption and emission described above.
A right circular cylinder has a height of 1 m and diameter of 75 cm. Find the view factor for the cylindrical to the base.
An engineer is investigating objects that can be used as a solar collector. One ofthe objects considered is the object made of aluminum and is coated with leadsulfate. Investigation shows that the reflectivity of this object is 0.2 for radiationat wavelengths less than 3.3 μm and 0.95 for radiation greater than 3.3 μm. Inorder to get better insight into the behavior of the object, as a candidate for asolar absorber, the object is then exposed to two different conditions: a solarradiation (T ~ 5800 K) and a room temperature (T ~ 300 K). What is the energyreflected by the object at these two conditions?
A 30 x 30 cm door in a brick kiln is at a distance of 3.5 m from a wall 12 m wide and 5 m high. The door is so located that a normal from the center of the door strikes the wall midway from the ends and 1.5 m above the floor. The opening into the kiln may be considered a black body; the wall is painted flat paint (Ɛ = 0.46). The temperature inside the kiln is 1 400 C and the wall temperature is 60 C. Determine (a) the configuration factor F12 and (b) the net radiant heat exchange between the opening and the wall when the fire door is open?
Which one is correct answer it fast urgent
A plate that is exposed to the outside environment at 30 ° C, gets airradiation of 2000 W / m2. The plate, which absorbs 80% of the irradiationand it has an emissivity of 0.5, it is always at a uniform temperature.An external air flow at 20 ° C and 15 W / m2-K go through the plate. Calculatethe temperature of the plate if it is in thermal equilibrium and insteady state conditions.
Consider a silicon wafer positioned in a furnace that is zone-heated on the top section and cooled on the lower section. The wafer is placed such that the top and bottom surfaces of the wafer exchange radiation with the hot and cold zones respectively of the furnace. The zone temperatures are Tsur,h = 1050 K and Tsur.e = 330 K. The emissivity and thickness of the wafer are e = 0.65 and d = 0.78 mm, respectively. With the ambient gas at T. = 700 K, convection heat transfer coefficients at the upper and lower surfaces of the wafer are 8 and 4 W/m²-K. Find the steady-state temperature of the wafer, in K. Tw i K
It's a complete question. Need help asap.
All information are given. Please need Correct answer!!!!
A right circular cylinder has a height of 1 m and diameter of 75 cm. Find the view factor for the cylindrical to the base.
Two very large parallel plates are kept at uniform temperatures T1=800 K and T2=500 K, and have emissivities ε1=0.2 y ε2=0.7, respectively, as shown in the figure. Determine the net rate of radiation heat transfer between the two surfaces per unit surface area of the plates.