Science And Technology Flashcards
Explain the Chandrayaan-2?
-India’s second lunar exploration mission.
-ISRO will launch the mission using the more powerful rocket GSLV-MkII fitted with the indigenous cryogenic engine.
-mission includes indigenously developed lunar orbiter, a lander and a lunar rover (wheeled rover will move on the lunar surface and will pick up soil or rock samples for on-site chemical analysis).
-The data will be relayed to Earth through the Chandrayaan-2 orbiter.
What is SAFAR-Mumbai?
Abput System of Air Quality & weather Forecasting and Research (SAFAR) is a application developed by- Indian Institute of Tropical Meteorology (IITM), Pune along with Regional Meteorological Center Mumbai (IMD), and the Municipal Corporation of Greater Mumbai (MCGM).
•This app will deliver services, by translating technical data into information, like colour-coded index based current and 3-days forecast with health advisories, severity of UV radiation with associated skin advisories, current and 3-days advance forecast, tidal levels and severe weather alert for extreme pollution and weather events, and accounting location-wise sources of air pollution.
Scramjet
Supersonic combustion ramjet, an air breathing propulsion system which would power the rocket (weighed 3 tonne, RH-560) in its second stage of flight. The speed of the rocket is six MACH.
It works on an air breathing philosophy that reduces the amount of oxidiser to be carried along the combustion fuel. It uses hydrogen as fuel and atmospheric oxygen as oxidiser. India is the 4th nation to build it.
High Thoroughput Communication Spacecraft.
HTS reuses satellite ‘beams’ several times over smaller areas.
The next generation spacecraft HTS-1 and HTS-2 of very high capacity of 100 gbps each, which will cover the country’s total land mass.
It will drive a next generation technology revolution. Individuals, planners in government, businesses like banks, ATMs, reservation systems, cellular and private networks and users in remote areas are expected to benefit from improved connectivity.
Capactative Deionisation Technology recently developed at IIT-M.
The researchers used a stack of tissue paper and carbonised it at high temperature to make graphene. Graphite electrodes were then coated with the graphene produced in the lab. When a small potential is applied to the electrodes, the brackish water gets deionised to become potable water.
An electrode for such deionisation purposes should have high surface area, high electrical conductivity and high porosity.
When the electrodes are dipped into brackish water and 1.8 volt potential is applied to the electrodes, the sodium and chloride ions move towards respective electrodes and get adsorbed. In about five minutes, the brackish water turns into potable water with less than 500 parts per million (ppm) of sodium chloride, which is less than the permissible limit for drinking water.
Worlds largest radio telescope
Made in China 500 m in diameter, is nestled in natural basin Krast formation in southern Guizhou province. To get radio signals from space.
Smaller than this is 300 m diameter in Puerto Rico that led to a Nobel prize
