Edward asked in 科學及數學化學 · 1 decade ago

Difficult question in Science : I need your help (15)

Why do some matters expand when heated, contract when cooled?

Please help me to solve it, but please answer completely and clearly, thanks a lot for your help.

2 Answers

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  • 1 decade ago
    Favorite Answer

    when something is heated, the praticles in inside will begin to move in a large wave and high speed. therefore,the things will expand due to the praticles' movement.

    when they were cooled the praticles will not be as active as it is heated up. and some how they move slowly. the potential energy store in the things will make it contract

  • 1 decade ago

    OUR next task is to study coming-to-be and passing-away. We are to

    distinguish the causes, and to state the definitions, of these

    processes considered in general-as changes predicable uniformly of all

    the things that come-to-be and pass-away by nature. Further, we are to

    study growth and 'alteration'. We must inquire what each of them is;

    and whether 'alteration' is to be identified with coming-to-be, or

    whether to these different names there correspond two separate

    processes with distinct natures.

    2007-01-21 09:24:50 補充:

    On this question, indeed, the early philosophers are divided. Someof them assert that the so-called 'unqualified coming-to-be' is'alteration', while others maintain that 'alteration' and coming-to-beare distinct.

    2007-01-21 09:25:41 補充:

    For those who say that the universe is one something(i.e. those who generate all things out of one thing) are bound toassert that coming-to-be is 'alteration', and that whatever'comes-to-be' in the proper sense of the term is 'being altered':

    2007-01-21 09:25:56 補充:

    but those who make the matter of things more than one must distinguishcoming-to-be from 'alteration'.To this latter class belongEmpedocles, Anaxagoras, and Leucippus. And yet Anaxagoras himselffailed to understand his own utterance.

    2007-01-21 09:26:26 補充:

    He says, at all events, thatcoming-to-be and passing-away are the same as 'being altered':' yet,in common with other thinkers, he affirms that the elements aremany.

    2007-01-21 09:26:38 補充:

    Thus Empedocles holds that the corporeal elements are four,while all the elements-including those which initiate movement-are sixin number; whereas Anaxagoras agrees with Leucippus and Democritusthat the elements are infinite.

    2007-01-21 09:29:15 補充:

    我找到令外一個更好的答案。Good sense is, of all things among men, the most equally distributed; for every one thinks himself so abundantly provided with it, that those even who are the most difficult to satisfy in everything else,

    2007-01-21 09:29:52 補充:

    do not usually desire a larger measure of this quality than they already possess. And in this it is not likely that all are mistaken the conviction is rather to be held as testifying that the power of judging aright and of distinguishing truth from error,

    2007-01-21 09:30:10 補充:

    which is properly what is called good sense or reason, is by nature equal in all men; and that the diversity of our opinions, consequently, does not arise from some being endowed with a larger share of reason than others, but solely from this, that we conduct our thoughts along different ways,

    2007-01-21 09:30:32 補充:

    and do not fix our attention on the same objects. For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it. The greatest minds, as they are capable of the highest excellences, are open likewise to the greatest aberrations;

    2007-01-21 09:32:10 補充:

    and those who travel very slowly may yet make far greater progress, provided they keep always to the straight road, than those who, while they run, forsake it.參考資料: http://humanum.arts.cuhk.edu.hk/~hkshp/wclassic/de...

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