20

15

10

5

173.2 sq.cm

43.3 sq.cm

123.2 sq.cm

None of the above

510.714 square millimeter

51071.4 square millimeter

1000 square millimeter

None of the above

Copper 50%, Tin 50%

Copper 60%, Tin 40%

Copper 80%, Tin 20%

Copper 40%, Tin 60%

upper critical temperature

lower critical temperature

melting temperature

freezing temperature