Question

iron ,lead and brass spheres of equal masses are heated to a common temperature and are kept on a sheet of wax the spheres that passes through the plate first is (laed 0.03cal/g°c,iron 0.11cal/g°c,brass 0.05cal/g°c​

Answer 1

Answer:

All three sphere will pass through the wax sheet at the same time because is independent of the specific heat capacity

Explanation:

Here we know that heat given by the sphere is used to melt the wax sheet

So we have energy equation given as

$ms\Delta T = m' L$

Rate of heat loss to the surrounding is given as

$\frac{dQ}{dt} = \sigma e A(T^4 - T_s^4)$

$-ms \frac{dT}{dt} = \sigma e A(T^4 - T_s^4)$

now we have

$\frac{dm'}{dt} L = \sigma eA(T^4 - T_s^4)$

so rate of melting of wax sheet is given as

$\frac{dm'}{dt} = \frac{\sigma eA(T^4 - T_s^4)}{L}$

so rate of melting of sheet will be same in all three cases as it only depends on surface Area which is same for all

#Learn

Topic : Heat transfer

https://brainly.in/question/12281727

Answer 2

Answer:

Iron is the correct answer

Explanation: