A. is straining cooked pasta from water a physical or chemical separation? b. is using a fuel cell to separate water into hydrogen and oxygen a physical or chemical separation? c. which type(s) of matter (mixtures/compounds/elements) could be separated by physical methods ? d. which type(s) of matter (mixtures/compounds/elements) would need to be separated by chemical methods? explain all of the above .

A) Answer is: physical separation, because there is no reaction and new substance is not synthesise.

B) Chemical separation, old bonds are broken and new ones are formed.

Chemical reaction: 2H₂O → 2H₂ + O₂.

C) Mixtures, because there are no chemical bonds between substances in the mixture.

D) Compounds, because chemical bonds betwwen elements in the compounds must be broken.

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.