Question

2. A brass and a steel rod are each 1 m long at 0°C.
Find the difference in their lengths at 100°C. Given
a for steel 0.000012 °C-1 and a for brass
= 0.000018 °C–1.
[Ans. 6 x 10-4m]​

Answer 1

Answer:

We know, l

2

−l

1

=α×l

1

×t, where l

1

= initial length, and l

2

= final length; t= temperature difference (as initial temperature = 0)

Now final length for steel and brass rod will be same.

Generally written, l

2

=l

1

(1+αt)

l

2

for brass = l

2

for steel

150(1+18×10

−6

×t)=150.2(1+12×10

−6

×t)

Solving we get, t=222.8163 degree centigrade

Answer 2

Answer:

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