Question

a metal scale gives correct reading at 25 degree celcius .if the reading of the length of a rod on that scale at 15 degree is 80cm,find the length of the rod at the temperature​

Answer 1

Explanation:

The new length of the steel scale =L(1+α

s

)

Thus the scale readings have shrunk by a factor of 1+α

s

.

The new length of the copper rod =L(1+α

c

).

Thus the reading on the scale =L(

1+α

s

1+α

c

)