Why do we use water displacement ?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Which composition of water moves to begin a deepwater current?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .