A calorie equals about 4.2J where 1J = 1 kgm2/s2. Suppose we employ a system of units in which the u

Asked by  | 12th Jul, 2008, 04:06: PM

Expert Answer:

Let the new system be P,Q, R  such that
 
1P = x Kg  → 1Kg = (1/x) P
 

1Q = y m →   1m = (1/y) Q

1R = z s    →  1s = ( 1/z) R

Now      1J = 1 (Kg) (m)(s)-2

Substitute the values of Kg , m, s in the above formula :

1J = 1 (1/x)P  (1/y)2 Q2   (z2) R-2

 

1J = 1x-1y-2z2  PQ2R-2

 

Hence 1Calorie = 4.2  Kgm2s-2 = 4.2 x-1y-2z2  PQ2R-2  in the new system(PQR).

Answered by  | 20th Oct, 2008, 02:11: AM

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