In what state is aluminum, copper, iron, solid or liquid at a temperature of 1000?

Given:

T = 1000 degrees Celsius – temperature of copper, aluminum, iron;

Tcopper = 1080 degrees Celsius – melting point of copper;

Aluminum = 660 degrees Celsius – the melting point of aluminum;

T iron = 1540 degrees Celsius is the melting point of iron.

It is required to determine in what state (liquid or solid) substances are at a temperature T.

Since T <Tcopper (1000 <1080), then copper is in a solid state;

Since T> Aluminum (1000> 660), then aluminum is in a liquid state;

Since T <T iron (1000 <1540), then iron is in a solid state.

Answer: at a temperature of 1000 degrees Celsius, copper and iron are in a solid state, aluminum is in a liquid state.