Look at the table. What word completes label 2 for the right hand column? Enter your answer
(1)
(2)
Examples
concrete, air, sea water
water, carbon dioxide, sodium
chloride
Separation
each substance within it is
separated easily
only separated using chemical
reactions
Composition
variable - you can vary the
amount of each substance in it
definite - you can't vary the
amount of each element in it
Joined or not?
the diffe substances
(3)
chemically joined
the different elements
(4)
chemically joined

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

a