Question

two spheres of radii in the ratio 2:3 have specific heats in the ratio 3:4 their densities are in the ratio 4:5 their water equivalent are in the ratio!???

plzz as soon as possible..

Answer 1

Thus their water equivalence are in the ratio of TC1 / TC2  = 8/45

Explanation:

Thermal capacity = mass × specific heat.

Mass = volume  x density

For a sphere, volume is directly proportional to its cube of radius.

TC ∝r^3 .ρ.C

TC1 / TC2  =  r1^3  .ρ  1  .C  1  /r2^3  ρ  2  .C  2

TC1 / TC2  = (2/3)^3 .(3/4) . (4/5)

TC1 / TC2  = 8 / 27 . 3/4 x 4/5

TC1 / TC2  = 2/9 . 4/5

TC1 / TC2  = 8/45

Thus their water equivalence are in the ratio of TC1 / TC2  = 8/45

 

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Answer 2

I don't know the answer