ما يقوله الناس - كتابة مراجعة
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amount angle angular velocity atmosphere atoms attraction axis body Boyle's Law calculated called carbonic acid Cavendish experiment centre compressibility contour lines corpuscules cube curvature curve cylinder definite density determined diffusion dimensions diminished direction distance earth effect elastic energy equal experiment experimental film fluid gases give given glass gravitation greater heat Hence hodograph homogeneous Hooke's Law horizontal hydrogen hydrostatic hydrostatic pressure inch increase inertia inversely kind length liquid Mariotte mass matter measured mercury modulus molecular forces molecules moment of inertia motion Newton's obtained oscillation P. G. TAIT parallel particles perpendicular phenomena piezometer plane pressure produced properties proportional quantity radius ratio rigidity rotation shows side solid space speed sphere spherical square stress substance suppose surface surface-tension temperature tension theory tion torsion tube unit vapour velocity vertical vessel vibration viscosity volume weight whole wire Young's modulus
الصفحة 135 - It is inconceivable that inanimate brute matter should without the mediation of something else, which is not material, operate upon and affect other matter without mutual contact, as it must be if gravitation, in the sense of Epicurus, be essential and inherent in it.
الصفحة 161 - A Defence of the Doctrine touching the spring and weight of the air ... against the objections of Franciscus Linus, etc.
الصفحة 3 - ... but to derive two or three general principles of motion from phenomena, and afterwards to tell us how the properties and actions of all corporeal things follow from those manifest principles, would be a very great step in philosophy, though the causes of those principles were not yet discovered: and therefore I scruple not to propose the principles of motion above mentioned, they being of very general extent, and leave their causes to be found out.
الصفحة 318 - We have reached the utmost limits of our thinking faculties when we have admitted that because matter cannot be eternal and self-existent it must have been created. It is only when we contemplate, not matter in itself, but the form in which it actually exists, that our mind finds something on which it can lay hold.
الصفحة 102 - The rate of change of momentum is proportional to the impressed force, and takes place in the direction in which the force acts.
الصفحة 302 - Spencer records his conviction that 'the chemical atoms are produced from the true or physical atoms by processes of evolution under conditions which chemistry has not yet been able to produce.
الصفحة 113 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
الصفحة 135 - That gravity should be innate, inherent, and essential to matter, so that one body may act upon another at a distance, through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking can ever fall iuto it. Gravity must be caused by an agent acting constantly according to certain laws; but whether this agent...