Question

a metal sheet is to 4m ×3m size. what is the increase in its surface area when heated through 80 ? give that coffieciant of superficial expansion of the metal is 2.4×10-5c

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Answer 1

Answer:

Answer

Increase in area = initial area x coefficient of area expansion x change in temperature

Here all the values are given except coefficient of area expansion

Coefficient of areal expansion=increase in area/(initial area × change in temperature)

Coefficient of areal expansion =

1.2×100

2.4×10

−4

Putting the given values, we get coefficient of area expansion = 2 x 10

−6

Now coefficient of volume expansion =

2

3

x coefficient of area expansion =3× 10

−6

Answer 2

Answer:

the answer will be the 230