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**1. Homework Statement**

I need help at identifying what forumala's to use to calculate the following

(Density of Aluminium 2770kg/m^3

An aluminium plate has a mass of 5kg and a surface area of 2m^2. The temperature of the plate is 450°C. The plate is immersed in a container of water of which the temperature rises from 20°C to 80°C. Only 70% of the heat energy given off by the plate is transferred to the water

Calculate

- Decrease in surface area of plate after being immersed in water

- percentage change in area due to temperature change

- heat transferred to water

- mass of the water

I have been going through the examples in the book and i just don't see how I will work it out. It seems I need a coefficient of linear expansion and coefficient of area expansion

but I just get 0 both times.

need to be pointed in the right direction to solve the problem as in formulas that would need to be used.

**2. Homework Equations**

**3. The Attempt at a Solution**