A metal sheet with a circular hole is heated. The hole
(1) Gets larger
(2) Gets smaller
(3) Remains of the same size
(4) Gets deformed

A metal sheet with a cricular hole in heated. The hole

When KClO_3 is heated we get

A metal disc has a hole in it. When the disc is heated, the size of the hole _________

A very small hole in an electric furnace is used for heating metals. The hole nearly acts as black body. The area of the hole is 200mm^(2) To keep a metal at 727^(@)C heat energy flowing throungh this hole per sec in joules is (sigam =5.67 xx 10^(-8)Wm^(-2)K^(-4)) .

If a uniform metal plate with a hole in it heated then explain how the size of the hole gets effected?