But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat.

Each individual fact, taken by itself, can indeed arouse our curiosity or our astonishment, or be useful to us in its practical applications.

The older view of the nature of heat was that it is a substance, very fine and imponderable indeed, but indestructible, and unchangeable in quantity, which is an essential fundamental property of all matter.

I then endeavoured to show that it is more especially in the thorough conformity with law which natural phenomena and natural products exhibit, and in the comparative ease with which laws can be stated, that this difference exists.

Windmills, which are used in the great plains of Holland and North Germany to supply the want of falling water, afford another instance of the action of velocity. The sails are driven by air in motion - by wind.

Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This is the case, for instance, when we produce fire by striking flint against steel, or when an iron bar is worked for some time by powerful blows of the hammer.

The law in question asserts, that the quantity of force which can be brought into action in the whole of Nature is unchangeable, and can neither be increased nor diminished.

Now, the external work of man is of the most varied kind as regards the force or ease, the form and rapidity, of the motions used on it, and the kind of work produced.

Iron which is brought near a spiral of copper wire, traversed by an electrical current, becomes magnetic, and then attracts other pieces of iron, or a suitably placed steel magnet.

Reason we call that faculty innate in us of discovering laws and applying them with thought.

What appeared to the earlier physicists to be the constant quantity of heat is nothing more than the whole motive power of the motion of heat, which remains constant so long as it is not transformed into other forms of work, or results afresh from them.

You all know how powerful and varied are the effects of which steam engines are capable; with them has really begun the great development of industry which has characterised our century before all others.

A raised weight can produce work, but in doing so it must necessarily sink from its height, and, when it has fallen as deep as it can fall, its gravity remains as before, but it can no longer do work.

A moving body whose motion was not retarded by any resisting force would continue to move to all eternity.

But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat.

Not that I wish by any means to deny, that the mental life of individuals and peoples is also in conformity with law, as is the object of philosophical, philological, historical, moral, and social sciences to establish.

A metaphysical conclusion is either a false conclusion or a concealed experimental conclusion.

But heat can also be produced by the friction of liquids in which there could be no question of changes in structure or of the liberation of latent heat.

There are two sides to every question.

You look at the whole Human Rights questions, I happened to be there at just the right time when the country was awakening - this goes to the first question you asked - the whole country was awakening to a hundred years of injustice that hadn't been resolved yet.

So, for example, a country was into recession right after I was sworn in, a dot-com bust had taken place. Then the attacks of September the 11th, and then of course the great financial meltdown in the -the fundamental question facing any presidency is how do you deal with the hand you're dealt?

If not for music, I would probably be a very frustrated scientist. It's one way to answer the question, 'What is the meaning of life?' I feel music answers it better.

Did you hear that? I didn't hear anything. Put that question another way.

If you do not know how to ask the right question, you discover nothing.

The real question isn't whether you love your kids or not, but how well you are able to demonstrate your love and caring so that your children really feel loved.

There is no question that everybody who works in show business is lucky because of the number of people who wish they where working in show business.

A single question can be more influential than a thousand statements.

He said there is 80 of us, ready to come down and the next thing I knew is that Jo Brown dashed in and said your family has already moved and you have to move, the boat is ready to take you out. I didn't have time to ask, even ask a question.

So begins a question which has of late become more and more urgent: what is the relation of aesthetics to politics?

When artists make art, they shouldn't question whether it is permissible to do one thing or another.

There's another issue here - and I have some limits as to what I can say - but there's some real question as to the viability of the chemical masks, the protective gear used by our soldiers.

This is largely the methodology I've used throughout my career - that is, starting with a question as to what might be the properties of a set of compounds that could be invented which were unusual and unpredictable. Many times I've felt a bit like Columbus setting sail.

In mathematics the art of proposing a question must be held of higher value than solving it.

The question is: Where would it get you if something that's a little bit ambiguous in the movie is made clear? It doesn't get you anywhere.

Well, WorldCom's growth exploded in the Clinton years, there's no question, there's no disputing that.

Fix reason firmly in her seat, and call to her tribunal every fact, every opinion. Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blindfolded fear.

People of little understanding are most apt to be angry when their sense is called into question.

By asking a novel question that you don't know the answer to, you discover whether you can formulate a way of finding the answer, and you stretch your own mind, and very often you learn something new.

Slavery is not the only question which comes up in this controversy. There is a far more important one to you, and that is, what shall be done with the free negro?

Will dissent be permitted? The answer to that question will determine whether the society is a free society or a fear society.

Faulkner turned out to be a great teacher. When a student asked a question ineptly, he answered the question with what the student had really wanted to know.

The question was heatedly debated of how much Western culture should be brought into China.

Rock and roll doesn't necessarily mean a band. It doesn't mean a singer, and it doesn't mean a lyric, really. It's that question of trying to be immortal.

Nature puts no question and answers none which we mortals ask. She has long ago taken her resolution.

God willing, we shall come to a stage where the world looks at the Palestinian question, and Palestinian rights on Palestinian national soil, as well as the questions of the occupied Syrian and Lebanese territories. These are the bases on which peace will be built.

Asked at the hearing why she hadn't pressed the FBI more closely about what it knew, or didn't know, about domestic terrorist threats, Rice acted as though the question was an odd one: it wasn't her job. Well, in retrospect, it was and now certainly is.

When the problems in Northern Ireland started, it was not a question of Protestantism or Catholicism, because the Catholic church was the only church at that time-it was a nationalist conflict.

The question arises whether all lawyers are the same. This is like asking whether everything that gets into a sewer is garbage.

I deem it established, then, that the Constitution does not recognize property in man, but leaves that question, as between the states, to the law of nature and of nations.