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A metallic sphere of diameter 2 cm is coated with lamp black and is maintained at a temperature of 927 ^oC. Calculate the rate at which energy is radiated from its surface, assuming that it is a perfect radiator.

Chemistry

True or False :
Silver fluoride is fairly soluble in water.

Mathematics

Multiple Choice Question
Three distinct numbers are selected from first 150 natural numbers. The probability all the three numbers are divisible both by 3 and 5 is

(a)	1/33	(b)	1/35
(c)	1/49	(d)	none of these

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