1. A body weighs 200 N in air and 125 N when submerged in water. Calculate its specific weight.
2. An object with a volume of 1200 cm3 weighs 20 N. What will it weigh when submerged in water?
3. A body lighter than water requires a force of 20 N to hold it under water. If it weighs 75 N in air, what is its density and specific gravity?