The actual density could be determined by measuring the fraction of the ship that is under water. When the plunger on a capped syringe is pulled out and released, it immediately goes back close to its original position. This is because when it is in its extended position there are fewer gas molecules colliding with the inside surface of the plunger than the outside surface. A ruler marked in millimeters and centimeters can be used to measure the length of a one foot ruler to four significant figures. The element chlorine has different chemical products from those of chloride ions.
All matter is solid at absolute zero.
The volume of a lead brick is 485 cm 3 . A plastic balloon filled with air is left on a chair. A large capped syringe was held vertically. An increasing number of magazines was placed on the syringe and the volume measured. The following data was generated.