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At constant pressure the rams velocity ‘c’ is related to density ‘d’ as (A) c ∝ d

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At constant pressure the rams velocity ‘c’ is related to density ‘d’ as

(A) c ∝ d 

(B) c ∝ 1/d 

(C) c ∝ √d 

(D) c ∝ 1/√d 

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Answer is (D) c ∝ 1/√d

PV = RT Or PM = RTd. If P is constant, then T ∝ 1/d. But T∝ Q2.

Hence C ∝ 1/√d. 

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