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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
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?
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.
Name the first artificial satellite sent by Russia in space.
The function of a satellite launcher is based on Newton's second law of motion.
Calculate the critical velocity of the satellite to be located at 35780 km above the surface of earth.
Observe the figure and write the answers.
- Name the outer orbit.
- Which satellites revolve in low earth orbits?
- Which various orbits are given in the figure?
- Give an example of a launch vehicle based on Newton’s third law.
Define orbital velocity.
Write a note on orbital velocity
Why are some satellites called geostationary?
Numerical problem.
At an orbital height of 400 km, find the orbital period of the satellite.
What is microgravity?
Geostationary satellites are not useful for studies of the polar region.
Complete the Following table.
| Sr. no. | Type of Satellite | The names of Indian Satellite and launcher |
| (1) | Navigational Satellite | Satellite: ______ |
| Launcher: ______ | ||
| (2) | Earth Observation Satellite | Satellite: ______ |
| Launcher: ______ |
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.)
