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The Salt Story From: The New Indian Express 9 March 2021 The salt pans in Marakkanam, a port town about 120 km from Chennai are the third largest producer of salt in Tamil Nadu. Separation of salt from water is a laborious process and the salt obtained is used as raw materials for manufacture of various sodium compounds. One such compound is Sodium hydrogen carbonate, used in baking, as an antacid and in soda acid fire extinguishers. The table shows the mass of various compounds obtained when 1litre of sea water is evaporated What is the pH of the acid which is used in the formation of common salt?

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When a man holding spring balance in stationary lift then it's reading is 60 kg . Now if lift starts descends with constant acceleration 1.8 m/ s^(2) then what is the new reading of spring balance in newton (take g =10 m/ s^(2) )

A particle of mass 3 kg moves under a froce of [4 hati + 8 hatj+ 10 hatk] newton . Calcutale the acceleration (as vector) to which the particle is subjected. If the particle starts from rest and was at the origin initially. What are its new co - ordinates after 3 s?