please help me tis question as soon as possible

[bee]

1. The problem statement, all variables and given/known data



2. Relevant equations

a flat, uniform cylinder of lead float in mercury in 0 degree celcius. Will the lead float higher or lower when the temperature is raised? Explain.

3. The attempt at a solution

[kuruman]

What do you know about floating objects? What must be true for an object to float in a fluid? What happens to mercury when its temperature rises?