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Which one of the following reflects back more sunlight as compared to other three?
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Important Questions on Science and Technology
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Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1. the orbit is geosynchronous.
2. the orbit is circular.
3. the orbit lies in the place of the Earth’s equator.
4. the orbit is at an altitude of 22236 km.
Select the correct answer using the codes given below:
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1. DVD supports Standard Definition video while BD supports High Definition video.
2. Compared to a DVD, the BD format has several times more storage capacity.
3. Thickness of BD is mm while that of DVD is mm.
Which of the statement(s) given above is/are correct?
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1. Thorium is far more abundant in nature than uranium.
2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.
Which of the statement(s) given above is/are correct?
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1. It is a surface-to-surface missile.
2. It is fuelled by liquid propellant only.
3. It can deliver one-tonne nuclear warheads about 7500 km away.
Select the correct answer using the codes given below
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Which of the following pair(s) is/are correctly matched?
| Spacecraft | Purpose |
| 1. Cassini-Huygens 2. Messenger 3. Voyager 1 and 2 |
Orbiting the Venus and transmitting data to the Earth Mapping and investigating the Mercury Exploring the outer solar system |
Select the correct answer using the codes given below :
