Engineering, 21.09.2019 16:30 Jasten
Asatellite orbits the earth every 2 hours at an average distance from the earth's centre of 8000km. (i) what is the average angular velocity of the satellite about the earth's centre? (ii) what is the average speed of the satellite in its orbit? (iii) if its mass is 200kg, what is the centripetal force required to keep it in orbit (i. e. the force of gravity)?
Answers: 3
Engineering, 04.07.2019 18:10
The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody
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Engineering, 04.07.2019 18:10
Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
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Engineering, 04.07.2019 18:20
How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s
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Engineering, 04.07.2019 19:10
The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object
Answers: 1
Asatellite orbits the earth every 2 hours at an average distance from the earth's centre of 8000km....
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