Question

3. A tungsten rod expands by 9 cm when
heated by 1000 °C. What was its original
length if the coefficient of linear expansion
of tungsten is 0.0000045/°C? [Ans.: 20 m)​

Answer 1

9/(.0000045x1000)

=9/.0045

=90000/45

=200cm

=20m

Answer 2

Answer:

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