HETAV PATEL

Grade 11,

The area A of a rectangular plate is ab. Its coefficient of linear expansion is α. After a temperature rise .After a temperature rise ∆T, side a is longer by ∆a and side b is longer by ∆b. show that if we neglect the small quantity ∆a ∆blab (see Fig.), then ∆A=2 αA∆T, verifying.

The area A of a rectangular plate is ab. Its coefficient of linear expansion is α. After a temperature rise .After a temperature rise ∆T, side a is longer by ∆a and side b is longer by ∆b. show that if we neglect the small quantity ∆a ∆blab (see Fig.), then ∆A=2 αA∆T, verifying.
                             

Grade:upto college level

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