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A geo stationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation.Communications satellitesandweather satellites are of ten given geostationary orbits,so that the satellite antennas that communicate with them do not have to move to track them,but can be pointed permanently at the position in the sky where they stay.
Select the one which is not a mixture:
An atom of an element has atomic number 17 and mass number36 .The number of neutrons in its nucleus is
Which of the following elements is not present in stainless steel?
Refrigerators keep food unspoiled because
Urea is a —
The resources which can be used continuously year after year ate called