1.

The temp. at which the speed of sound in air becomes double its value at 0^(@) C is :

Answer»

`273^(@)` C
`546^(@)` C
`819^(@)` C
`1092 ^(@)` C

Solution :`(v_(t))/(v_(0)) = sqrt((T + 273)/(0 + 273) ) `
` THEREFORE 2 = sqrt((T + 273)/(273) ) RARR = T + 273 = 4 xx 273 `
t = `4 xx 273- 273^(@) = 819^(@) ` C
HENCE the correct choice is (c) .


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