Step 2
What is the total power received by the detector from a small, deep hole drilled in the block, in W?
Step 3
What is the reflectivity of the block surface?
Step 4
What is the radiosity of the surface, in W/m2?
Step 5
What is the total power received by the detector from the small area on the block surface, in W?
Homework Answers
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Step 2
What is the total power received by the detector from a small,
deep hole...
Heat Transfer (20) Radiation is emitted from a small opening (A 10 m2) of a furnace in which surface temperature is constant to be 2000K. The inner surface of the furnace is diffuse and gray (E-0.5)....
Heat Transfer
(20) Radiation is emitted from a small opening (A 10 m2) of a furnace in which surface temperature is constant to be 2000K. The inner surface of the furnace is diffuse and gray (E-0.5). A portion of this radiation is intercepted by three detectors that are 0.5m from the aperture as shown below. The area of three detectors is the same as 10 m2 The area of the opening of the furnace and detectors can be considered as...
A small block with mass m is attached to a cord passing through a hole in...
A small block with mass m is attached to a cord passing through
a hole in a frictionless, horizontal surface. The block is
initially revolving at a distance r from the hole with a speed vr.
as shown. (a) By what force F, applied by the hand is the block
held rotating? The cord is then pulled additionally from below,
shortening the radius of the circle in which the block revolves to
At this new distance, (b) what will the...
2. A small surface of area A measurements the total intensity associated with emission in the normal direction is In 10...
2. A small surface of area A measurements the total intensity associated with emission in the normal direction is In 103 m2 is known to emit diffusely, and from 7000 W/m2-s. Radiation emitted from the surface is intercepted by two other surfaces of area A2 A3 = 103 m2, which are oriented as shown. What is intensity associated with emission in each of the two directions? What are the solid angles subtended by the three surfaces when viewed from Ai?...
2. A pulsed airborne radar operating at 12GHz has a peak power of 1 kW and uses an antenna with directivity of 2100. Total monostatic path loss is 1.8. The radar views a surface at normal range of 3...
2. A pulsed airborne radar operating at 12GHz has a peak power of 1 kW and uses an antenna with directivity of 2100. Total monostatic path loss is 1.8. The radar views a surface at normal range of 3 km and grazing angle of t/2. The available received clutter power (Sre) is 1.1x10-11 What is the effective surface scattering area of σ,-2.5x10-4 for the surface? (10pts) a) b) If the radar and target orientation are changed such that the grazing...
Electromagnetic Wave Questions 2. Our sun has a power output of roughly 3.87 1026 watts (W)....
Electromagnetic Wave Questions
2. Our sun has a power output of roughly 3.87 1026 watts (W). This energy is transmitted essentially uniformly in all directions. By the time this radiation reaches the Earth, which has an average distance from the sun of 1.50 x 10" m, what is the intensity? (Recall that intensity is defined to be power per unit area). 3. The energy from the sun is primarily in the infrared and visual wavelengths. The following table gives the...
If the sun is about 150 Gm away from the Earth, what is the total power...
If the sun is about 150 Gm away from the Earth, what is the total power that hits the earth? You may assume that the Earth is a disk that faces the sun with a radius of 6378 km and the area is that of a circle of the same radius. (Answer in PW = 1e15 W with three sig figs)
hair dryer may be idealized as a circular duct through which a small fan draws ambient...
hair dryer may be idealized as a circular duct through which a
small fan draws ambient air and within which the air is heated as
it flows over a coiled electric resistance wire.
(1) If a dryer is designed to operate with an electric power
consumption of Pelec= 1500 W and to heat air from an ambient
temperature of Ti= 20°C to a discharge temperature of To= 45°C, at
what volumetric flow rate ∀˙ should the fan operate? Heat loss...
6. A shell is fired from a gun with a muzzle velocity of 20.0 m's, at...
6. A shell is fired from a gun with a muzzle velocity of 20.0 m's, at an angle of 60.0 with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that the air drag is negligible? (You may use R-(v/g) sin(20) 7. In...
Sage Ranch & Farm is a distributor of ranch and farm equipment. Its products range from small tools, power equipment for trench-digging and fencing, grain dryers, and barn winches. Most products are sold direct via its company catalog and Internet site. H
Sage Ranch & Farm is a distributor of ranch and farm equipment. Its products range from small tools, power equipment for trench-digging and fencing, grain dryers, and barn winches. Most products are sold direct via its company catalog and Internet site. However, given some of its specialty products, select farm implement stores carry Sage’s products. Pricing and cost information on three of Sage’s most popular products are as follows.ItemStandaloneSelling Price (Cost)Mini-trencher$ 3,900($2,000)Power fence hole auger1,300(900)Grain/hay dryer12,900(11,000)Respond to the requirements related to the following independent...
1. According to the paper, what does lactate dehydrogenase (LDH) do and what does it allow...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
Heat Transfer
(20) Radiation is emitted from a small opening (A 10 m2) of a furnace in which surface temperature is constant to be 2000K. The inner surface of the furnace is diffuse and gray (E-0.5). A portion of this radiation is intercepted by three detectors that are 0.5m from the aperture as shown below. The area of three detectors is the same as 10 m2 The area of the opening of the furnace and detectors can be considered as...
A small block with mass m is attached to a cord passing through
a hole in a frictionless, horizontal surface. The block is
initially revolving at a distance r from the hole with a speed vr.
as shown. (a) By what force F, applied by the hand is the block
held rotating? The cord is then pulled additionally from below,
shortening the radius of the circle in which the block revolves to
At this new distance, (b) what will the...
2. A small surface of area A measurements the total intensity associated with emission in the normal direction is In 103 m2 is known to emit diffusely, and from 7000 W/m2-s. Radiation emitted from the surface is intercepted by two other surfaces of area A2 A3 = 103 m2, which are oriented as shown. What is intensity associated with emission in each of the two directions? What are the solid angles subtended by the three surfaces when viewed from Ai?...
2. A pulsed airborne radar operating at 12GHz has a peak power of 1 kW and uses an antenna with directivity of 2100. Total monostatic path loss is 1.8. The radar views a surface at normal range of 3 km and grazing angle of t/2. The available received clutter power (Sre) is 1.1x10-11 What is the effective surface scattering area of σ,-2.5x10-4 for the surface? (10pts) a) b) If the radar and target orientation are changed such that the grazing...
Electromagnetic Wave Questions
2. Our sun has a power output of roughly 3.87 1026 watts (W). This energy is transmitted essentially uniformly in all directions. By the time this radiation reaches the Earth, which has an average distance from the sun of 1.50 x 10" m, what is the intensity? (Recall that intensity is defined to be power per unit area). 3. The energy from the sun is primarily in the infrared and visual wavelengths. The following table gives the...
hair dryer may be idealized as a circular duct through which a
small fan draws ambient air and within which the air is heated as
it flows over a coiled electric resistance wire.
(1) If a dryer is designed to operate with an electric power
consumption of Pelec= 1500 W and to heat air from an ambient
temperature of Ti= 20°C to a discharge temperature of To= 45°C, at
what volumetric flow rate ∀˙ should the fan operate? Heat loss...
6. A shell is fired from a gun with a muzzle velocity of 20.0 m's, at an angle of 60.0 with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that the air drag is negligible? (You may use R-(v/g) sin(20) 7. In...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
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