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Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of the universe? 1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space

Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

A team of scientists at Brookhaven National Laboratory including those from India created the heaviest antimatter (anti-helium nucleus). What is/are the implication/ implications of the creation of antimatter? 1. It will make mineral prospecting and oil exploration easier and cheaper. 2. It will help probe the possibility of the existence of stars and galaxies made of antimatter. 3. It will help understand the evolution of the universe.

What is the role of ultraviolet (UV) radiation in the water purification systems? 1. It inactivates/kills the harmful microorganisms in water. 2. It removes all the undesirable odours from the water. 3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.

An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth

The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?

What is the principle by which a cooling system(Radiator) in a motor car works:

India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th five-Year Plan. In this context, consider the following statements:
1. Neutrinos are chargeless elementary particles that travel close to the speed of light.
2. Neutrinos are created in nuclear reactions of beta decay.
3. Neutrinos have a negligible, but nonzero mass.
4. Trillions of Neutrinos pass through human body every second.
Which of the statements given above are correct ?

In the year 2008, which one of the following conducted a complex scientific experiment in which sub-atomic particles were accelerated to nearly the speed of light ?

Which one of the following types of waves are used in a night vision apparatus ?