Question

if the melting point of iron rod is 204 degree Celsius and freezing point of aluminium rod is - 96 degree Celsius then how much the melting point of iron rod is more than the freezing point of aluminium rod?​

Answer 1

Answer:

The coefficient of linear expansion α for the alloy is

α=

LΔT

ΔL

=

(10.01 cm)(100

o

C−20.000

o

C)

10.015 cm−10.000 cm

=1.88×10

−5

/C

o

Thus from 100

o

C to 0

o

C we have

ΔL=LαΔT=(10.015 cm)(1.88×10

−5

/C

o

)(0

o

C−100

o

C)=−1.88×10

−2

cm

The length at 0

o

C is therefore L

′

=LΔL=(10.015 cm−0.0188 cm)=9.996 cm