求解幾條初三科學題 ?(20分)急!!!(如圖)

1. Heat needed to melt the iceberg
= 10^8 x 334000 J = 3.34 x 10^13 J
where 334000 J/kg is the latent heat of fusion of water

Heat needed to raise the temperature of the iceberg from 0'C to 4'C
= 10^8 x 4200 x 4 J = 1.68 x 10^12 J

Total heat required = (3.34x10^13 + 1.68x10^12) J = 3.51 x 10^13 J

2. Let T be the final temperature
Heat released by water
= 0.5 x 4200 x (30-T)
Heat absorbed by ice
= 0.1 x 334000 + 0.1 x 4200T
Using the heat balance equation,
0.5 x 4200 x (30-T) = 0.1 x 334000 + 0.1 x 4200T
solve for T gives T = 11.75'C