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Report | Archie dh asks : A cube of gold of 20 cms edge is melted and drawn into a bangle of outer radius 5 cms & inner radius 4 cms.Find the no. of bangles that can be made out of the given gold cube. |
Report | Arif raza asks : Dear tcy online, There was a paragraph in my science book,defining the term `MELTING POINT`,and i have some confusion regarding it,please answer the question after reading the para~~~~ MELTING POINT~ When ice is mixed with pottasium nitrate, it`s melting point decreases to about -3`o celcius. this implies that now ice does not melt at 0`celcius but last longer.this techinque is used by ice-cream vendor`s to retain ice in their trolleys for a longer time and prevent the ice-cream from melting. A similar reduction in the normal melting point of ice is also observed when common salt or ammonium nitrate is added to it. this fact is made use of, for clearing snow from roads and pavements on hill stations during winter. And now my question-- Q-How is it possible that the impurity will help in keeping the ice-cream for longer time,if it also help`s in clearing snow?please explain it briefly... |
Report | Alok singh asks : "Ants X and Y are both climbing up around a cylindrical Pipe. Both start at same point on the ground, X moves clockwise and Y anticlockwise. Before they reach at top X has made 5 complete twists and Y 3 twists. Not counting the bottom and the top, how many times do they cross each other?" plz explain it,dont just give answer "7". |
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