Physical Science
posted by Jessica .
A 200L iron tank has a mass of 36 kg. a) Will it float on seawater if empty? b) What mass of potatoes could be added such that the tank would still float? [Note: 1000 L = 1 m3 ]

density = g/mL = 36,000/200,000 = 0.18. It floats.
We can add mass until the density is 1.00 g/mL.
1.0 = mass/volume
V*1.0 = mass = 200,000 1 = 200,000 g
The barge has a mass of 36,000; therefore, 200,00036,000 = 164,000g = mass to be added. Check to see density = 1.0 g/L. d = m/v = 200,000/200,000 = 1.0 g/mL.