Question

A 50cm silver bar shorten by 1.0mm when cooled. How was it cooled? (Given the coefficient of linear expansion of silver = 18 x 10-⁶ per degree celcius)​

Answer 1

Explanation:

C

−10

o

C

l

1

l

2

−l

1

=α(50−20)

1

1×10

−3

=α(30)

α=3.34×10

−5

/

0

c

1

−1×10

−3

=α(T−20)

T=(−30+20)=−10

0

c