Which of the following option represent the correct altitude range in kilometers at which geostationary satellites orbit the earth ?
30,000 – 40,000 km
A geostationary satellite orbits above the equator with a period equal to one sidereal day, so it appears fixed over one point – the property Arthur C. Clarke proposed in 1945 for communication satellites such as INSAT and GSAT.
Matching that period requires an orbital radius of about 42,164 km from the earth's centre; subtracting the earth's equatorial radius of about 6,378 km gives an altitude of about 35,786 km (roughly 36,000 km).
Therefore the altitude lies in the 30,000 – 40,000 km band; the 0 – 10,000 km band covers low earth orbits (up to about 2,000 km) and the lowest medium earth orbits, and the 10,000 – 20,000 km and 20,000 – 30,000 km bands cover medium earth orbits such as navigation satellites.
Hence, 30,000 – 40,000 km.
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.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
Codes:
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(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
Which part of the QR code represents the encoded data?
