71.
How many Geo-synchronous satellites are required for uninterrupted world broadcasting?

72.
What is known as High Pressure Subtropical Latitude?

73.
Consider the following statements:
1. The tropical year is shorter than the sidereal year.
2. The solar day is longer than the sidereal day.
Which of the statements given above is/are correct?

74.
The Synchronous satellite moves around the Earth from

75.
What is 'Sidereal Day'?

76.
The earth revolves round the sun in its orbit by approximately ________

77.
The equatorial circumference is greater than the polar circumference by approximately ________

78.
Why does Russia have many local time differences?

79.
Lunar eclipse does not occur every month because ________

80.
A person sets off from Alaska on a Tuesday and reaches New Zealand the next day which will be ________

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