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Solve the Following Example - SSC (English Medium) Class 8 - Science

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Question

Solve the following example.

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?

Solution

Let the mass of B M.
Let the change in temperature be T for both the bodies, A and B.
The amount of heat in a body is given as 

Q = m × c × Δ T

For body A,

Q=m × c ×

`=> "T" = "Q"/("mc")`    ....(i)

For body B,

4Q=M × 2c ×

`=> "M" = (4"Q")/(2"c" xx "T")`

From (i) , T = `"Q"/("mc")`

`=> "M" = (4Q)/(2"c" xx "Q"/("mc")) = 2"m"`

  Is there an error in this question or solution?

APPEARS IN

 Balbharati Solution for Balbharati Class 8 Science - General Science (2018 to Current)
Chapter 14: Measurement and Effects of Heat
Exercise | Q: 4.4 | Page no. 103
Solution Solve the Following Example Concept: Concept of Temperature.
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