Exercise :: Science - Latest Current Affairs
- Science - Latest Current Affairs
| 1. | What is the name of the new white dwarf galaxy that was found by NASA/ESA Hubble Space Telescope? |
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Answer: Option B Explanation: An international team of astronomers used the NASA/ESA Hubble Space Telescope to study white dwarf stars within the globular cluster NGC 6752.
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| 2. | GSAT-31, which is in news recently, is launched from which of the following places? |
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Answer: Option C Explanation: India's latest communication satellite GSAT-31 was successfully launched by European launch services provider- Arianespace's rocket from Kourou Launch Base in French Guiana on February 6, 2019. The Ariane-5 vehicle (Flight VA247) also carried Saudi Geostationary Satellite 1/Hellas Sat 4 along with GSAT-31.
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| 3. | Name the new dwarf spheroidal galaxy discovered by astronomers from Italy, the UK, Germany and the United States, using Hubble Space Telescope, on 31st January 2019? |
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Answer: Option B Explanation: On January 31,2019, astronomers from Italy, the UK, Germany and the United States discovered newly discovered galaxy consists of red giant particles. Bedin 1 is a new dwarf spheroidal galaxy. This ancient galaxy is one of the oldest galaxy and was named after Luigi Bedin, a researcher at Italy's National Institute for Astrophysics. Bedin 1 is located 28.38 million light years from Earth.
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| 4. | How many companies were shortlisted by ISRO to transfer its Lithium-ion cells technology? |
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Answer: Option A Explanation: The Indian Space Research Organization (ISRO) selected 10 companies jointly with the NITI-Aayog from a list of 141 companies for transfer of its Lithium-ion cells technology developed by the Vikram Sarabhai Space Centre (VSSC), Thumba. ISRO developed Li-ion cells with capacities ranging from 1.5 Ah to 100 Ah for use in launch vehicles and satellites.
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| 5. | The researchers of this country developed a system that can produce electricity and hydrogen fuel from carbon dioxide. |
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Answer: Option C Explanation: Scientists from Ulsan National Institute of Science and Technology (UNIST) in South Korea have developed a system that can produce electricity and hydrogen fuel from carbon dioxide. The Hybrid Na-CO2 system can continuously produce electrical energy and hydrogen through efficient carbon dioxide (CO2) conversion with stable operation for over 1,000 hours. The key to this technology is the easy conversion of chemically stable CO2 molecules to other materials. Much of human CO2 emissions are absorbed by the ocean and turned into acidity. The researchers focused on this phenomenon and came up with the idea of melting CO2 into water to induce an electrochemical reaction.If acidity increases, the number of protons increases, which in turn increases the power to attract electrons. If a battery system is created based on this phenomenon, electricity can be produced by removing CO2. In particular, this system has shown stability to the point of operating for more than 1,000 hours without damage to electrodes. The system can be applied to remove CO2 by inducing voluntary chemical reactions.
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