Question

. Two substances A and B have specific
heats c and 2 c respectively. If A and B
are given Q and 4Q amounts of heat
respectively, the change in their
temperatures is the same. If the mass of
A is m, what is the mass of B?
(Ans. 2 m)​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Let the mass of B be M.

Let the change in temperature be T for both the bodies, A and B.

The amount of heat in a body is described as

Q = m × c × ΔT

For body A,

Q = m × c × T

⇒T = Q / mc …..(i)

For body B,

4Q = M × 2c × T

⇒M = 4Q / 2c × T

From (i), T= Q / mc

⇒ M = 4Q / 2c × Q / mc = 2m