User Account

All Pages

Amplifier operating and environmental conditions

Assignment Help Mechanical Engineering
Reference no: EM13880803

The exposed surface of a power amplifier for an earth satellite receiver of area 130 mm by 130 mm has a diffuse, gray, opaque coating with an emissivity of 0.5. For typical amplifier operating conditions, the surface temperature is 58°C under the following environmental conditions: air temperature. T = 27°C; sky temperature, T sky = - 20°C; convection coefficient, h = 15 W/m2 · K; and solar irradiation, GS = 800 W/m2.

(a) For the above conditions, determine the electrical power being generated within the amplifier.

(b) It is desired to reduce the surface temperature by applying one of the diffuse coatings (A B, C) shown as follows, which coating wil1 result in the coolest surface temperature for the same amplifier operating and environmental conditions? 

1362_amplifier operating and environmental conditions.jpg

Reference no: EM13880803

Questions Cloud

Compare foreign exchange brokers and foreign exchange dealer : Compare foreign exchange brokers and foreign exchange dealers
Who work best in a warm caring and democratic environment : Which of the following generations are most characterized by employees who work best in a warm, caring and democratic environment
What strategy would you advise them to pursue : Might his heirs suffer from being bequeathed too many of his works? As the heirs' financial adviser, what strategy would you advise them to pursue in selling pieces of his work?
Compute expected value for number of bedrooms in houses : Compute the expected value and variance for the number of bedrooms in owneroccupied houses.
Amplifier operating and environmental conditions : It is desired to reduce the surface temperature by applying one of the diffuse coatings (A B, C) shown as follows, which coating wil1 result in the coolest surface temperature for the same amplifier operating and environmental conditions?
Adopt a modified accrual basis of accounting : adopt a modified accrual basis of accounting
Important element of cash flow statement for management : What information does the cash flow statement provide that you cannot see in the other financial statements (income statement, balance sheet, owner's equity)?
Determining the volumetric heating : The exposed surface (x = 0) of a plane wall of thermal conductivity k is subjected to microwave radiation that causes volumetric heating to vary as where q"0 (W/m3) is a constant. The boundary at x = L is perfectly insulated, while the exposed sur..
Why it is important to protect the information organizations : Why it is important to protect the information organizations use today? What are the basic elements in systems that help with this task

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  What is minimum power required to run the air conditioner

An air conditioner maintains the temperature of a dwelling at 72 degrees Fahrenheit when it is 96 degrees Fahrenheit outside. If heat is transferred through the walls and ceiling at 35,000 BTU/hr. a) What is the minimum power required to run the Air..

  Determine the magnitude of the acceleration of the van

The engine of the van produces a constant driving traction force F at the wheels as it ascends the slope at a constant velocity v, determine the magnitude of the acceleration of the van,in m/s^2 .when it passes point A and begins to travel on a level..

  Assume that there is a constriction in a pipe which reduces

assume that there is a constriction in a pipe which reduces the pressure at that point in the pipe to -99 kpa gage.

  A certain factory manufactures tin cansit receive an order

a certain factory manufactures tin cans.it receive an order for 10000 cylindrical tin cans of height 5 inch and

  A piston-cylinder device contains an ideal gas the gas

a piston-cylinder device contains an ideal gas. the gas undergoes two successive cooling processes by rejecting heat to

  Use constant specific heats at room temperature

Determine the mean effective pressure of an ideal Otto cycle that uses air as the working fluid; it's state at the beginning of compression is 13 psia and 56°F; it's temperature at the end of combustion is 1,525°F; and it's compression ratio is 11. U..

  Steam enters a diffuser at 20 psia and 240of with a

steam enters a diffuser at 20 psia and 240of with a velocity of 900 fts and exits as saturated vapor at 240of and 100

  Assume you have 17 lbm of atmospheric air at 90 f into it

a popular method of cooling homes in the southwest us is the evaporative cooler. it cools air entering a home by

  Design an isolation system to limit the transmitted force

A machine of mass 400 kg operates at 1500 rpm and has an unbalanced which causes a harmonic repeated force pf magnitude 20,000 N. Design an isolation system to limit the transmitted force to 3,500 N and the amplitude of vibration during operation to ..

  Determine the temperature at which the treatment was carried

If after 49.5 h the concentration of carbon is 0.35 wt% at a position 4.0 mm below the surface, determine the temperature at which the treatment was carried out.

  Disk has angular velocity omega 01 rads at t 0 and

point a on circuilar disk is at angular position theta 0 at time t 0. disk has angular velocity omega 0.1 rads at t

  Determine the maximum theoretical speed that may be

determine the maximum theoretical speed that may be achieved over a distance of 360ft by a car of weight w starting

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd