Question

There are two brass spheres at the same temperature. If their radii are in the ratio 2.3. The ratio of their thermal capacities is
(A) 4:9
(B) 2:3
(C) 8:27
(D) 27:8​

Answer 1

Explanation:

R

2

R

1

=

2

1

,d

1

=d

2

,S

1

=S

2

(as they are of same material)

C

2

C

1

=

m

2

S

2

m

1

S

1

=

d

2

V

2

d

1

V

1

S

2

S

1

⇒

V

2

V

1

=

R

2

3

R

1

3

=

2

3

1

3

∴C

1

:C

2

=1:8