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प्रश्न
Distinguish between:
High Earth orbit - Medium Earth orbit.
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उत्तर
| High earth orbits | Medium earth orbits | |
| 1. | Height from the earth’s surface for these orbits is greater than or equal to 35780 km. | Height from the earth’s surface for these orbits is between 2000 km and 35780 km. |
| 2. | Satellites revolving in these orbits take around 24 hours to complete one revolution around the earth. | Satellites revolving in these orbits take around 2 to 24 hours to complete one revolution around the earth. |
| 3. | The satellites revolving in these orbits appear stationary with respect to earth. | The satellites revolving in these orbits do not appear stationary with respect to earth. |
| 4. | Satellites revolving in these orbits can be used for carrying signals for telephone, television etc. and also in the applications like meteorology. | Satellites revolving in these orbits can be used in the study of polar regions. |
| 5. | Example: IBEX (Interstellar Boundary Explorer) revolves in this orbit. | Examples: GLONASS (Global Navigation Satellite System) and Telstar – 1 revolve in these orbits. |
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संबंधित प्रश्न
Fill in the blank and explain the statement with reasoning:
If the height of the orbit of a satellite from the earth surface is increased, the tangential velocity of the satellite will ......
Complete the following table.
Solve the problem.
How much time a satellite in an orbit at height 35780 km above earth's surface would take, if the mass of the earth would have been four times its original mass?
If the height of a satellite completing one revolution around the earth in T seconds is h1 meter, then what would be the height of a satellite taking \[2\sqrt{2} T\] seconds for one revolution?
Considering first correlation, complete the second.
Hubble telescope : At 569 km above the earth’s surface
Orbit of Hubble telescope : .............................
Mahendra and Virat are sitting at a distance of 1 metre from each other. Their masses are 75 kg and 80 kg respectively. What is the gravitational force between them? G = 6.67 x 10-11 Nm2/kg2
Write the proper name of the orbits of satellites shown in the following figure with their height from the earth’s surface.
A group of students from COEP Pune sent a small satellite _______ through ISRO in 2016.
What is Medium Earth Orbit?
Note the relationship between the entries in all the three columns in the table and rewrite the table.
| Column-1 (Location) |
Column-2 Height from the earth’s surface (km) |
Column-3 g (m/s2) |
| Earth’s surface (average) | 8.8 | 0.225 |
| Mount Everest | 36.6 | 9.81 |
| Maximum height ever reached by manmade balloon | 400 | 9.8 |
| Orbit of a typical weather satellite | 35700 | 9.77 |
| Orbit of communication satellite | 0 | 8.7 |
Define orbital velocity.
How is a satellite maintained in nearly circular orbit?
Numerical problem.
Calculate the speed with which a satellite moves if it is at a height of 36,000 km from the Earth’s surface and has an orbital period of 24 hr (Take R = 6370 km) [Hint: Convert hr into seconds before doing calculation]
Numerical problem.
At an orbital height of 400 km, find the orbital period of the satellite.
The orbital velocity of the satellite depends on its ______.
Write down the formula of orbital velocity.
Complete the following equations:
The orbit of a satellite is exactly 35780 km above the earth's surface and its tangential velocity is 3.08 km/s.
How much time the satellite will take to complete one revolution around the earth?
(Radius of earth = 6400 km.)
