Please answer 1 to 4

1. Aluminum has a density of around 2.7 kg/m3. Does it float in water? Yes?, no?, Explain. 2. The density of gold is 19300kg/m3. Does a gold piece of jewellery float in water?. Explain. 3. If a 1m3 object is floating in water and the volume submerged is equal to 0,3 m3, what is the density of the object?. 4. You want to lift a 1000kg car with a hydraulic press that has a piston with an area A1=0.5cm2 and another one with area A2=40cm2. What is the force you should apply to the smaller piston