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?
Subject: Science and Technology
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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.
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.
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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.
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.
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A person stood alone in a desert on a dark night and wanted to reach his village which was situated 5 km east of the point where he was standing. He had no instruments to find the direction, but he located the polestar. The most convenient way now to reach his village is to walk in the
A person stood alone in a desert on a dark night and wanted to reach his village which was situated 5 km east of the point where he was standing. He had no instruments to find the direction, but he located the polestar. The most convenient way now to reach his village is to walk in the:
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The efforts to detect the existence of Higgs boson particle have become frequent news in the
The efforts to detect the existence of Higgs boson particle have become frequent news in the
recent past. What is/are the importance/importances of discovering this particle?
(1). It will enable us to under-stand as to why elementary particles have mass.
(2). It will enable us in the near future to develop the technology of transferring matter from
one point to another without traversing the physical space between them.
(3). It will enable us to create better fuels for nuclear fission.
Select the correct answer using the codes given below. -
The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct
The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?
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Fruits stored in a cold chamber exhibit longer storage life because
Fruits stored in a cold chamber exhibit longer storage life because
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Mycorrhizal biotechnology has been used in rehabilating degraded sites because mycorrhiza enables the plants to
Mycorrhizal biotechnology has been used in rehabilating degraded sites because mycorrhiza enables the plants to
(1). resist drought and increase absorptive area
(2). tolerate extremes of pH
(3). resist disease infestation
Select the correct answer using the codes given below. -
Many transplanted seedlings do not grow because
Many transplanted seedlings do not grow because
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Recombinant DNA technology (Genetic Engineering) allows genes to be transferred
Recombinant DNA technology (Genetic Engineering) allows genes to be transferred
(1). across different species of plants
(2). from animals to plants
(3). from microorganisms to higher organisms
Select the correct answer using the codes given below.