CBSE Class 11-science Answered
A calorie equals about 4.2J where 1J = 1 kgm2/s2. Suppose we employ a system of units in which the u
Asked by | 12 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)2 (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 | 20 Oct, 2008, 02:11: AM
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