Which of the following is an example of a trend?

the gradual warming of earths atmosphere over time
the cyclic rising and falling of the tides.
the phases of the moon
the random assortment of coins in a jar.

How do you tell if someone actually cares about you? and just say they do?

Ways that industry and agriculture use physical properties to separate substances

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.