Lessons in elementary physics1884 |
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Σελίδα 4
... instance , any substance apparently at rest , say a block of stone . Although there is no appearance of motion in this substance , yet we have very strong reasons for supposing that its various molecules are in rapid motion of some sort ...
... instance , any substance apparently at rest , say a block of stone . Although there is no appearance of motion in this substance , yet we have very strong reasons for supposing that its various molecules are in rapid motion of some sort ...
Σελίδα 5
... instance , suppose we fire a gun , the previous state of rest of the bullet has now been changed by the force of the gunpowder into one of rapid motion . Or take a railway train at rest ; the train is set into rapid motion through the ...
... instance , suppose we fire a gun , the previous state of rest of the bullet has now been changed by the force of the gunpowder into one of rapid motion . Or take a railway train at rest ; the train is set into rapid motion through the ...
Σελίδα 10
... this will vary as their volume . If , for instance , we have a number of similar cubes of iron , we know at once that the united mass of two such cubes will be double that of one , of three triple , ΙΟ CHAP . I. ELEMENTARY PHYSICS .
... this will vary as their volume . If , for instance , we have a number of similar cubes of iron , we know at once that the united mass of two such cubes will be double that of one , of three triple , ΙΟ CHAP . I. ELEMENTARY PHYSICS .
Σελίδα 11
... instance , imagine ourselves carried into empty space , with nothing but a cube of iron , and another of lead ; then how are we to determine their relative masses ? It is clear we cannot weigh them , for there is no down- wards and ...
... instance , imagine ourselves carried into empty space , with nothing but a cube of iron , and another of lead ; then how are we to determine their relative masses ? It is clear we cannot weigh them , for there is no down- wards and ...
Σελίδα 15
... instance , that in a railway carriage which is at rest I throw up a ball with sufficient force to make it reach the roof : if I throw up the ball with the same force when the carriage is in motion , it will equally reach the roof ; or ...
... instance , that in a railway carriage which is at rest I throw up a ball with sufficient force to make it reach the roof : if I throw up the ball with the same force when the carriage is in motion , it will equally reach the roof ; or ...
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49 metres 98 metres action actual energy angle annealed applied atmosphere attraction ball beam carbonic acid carriage centre of gravity chemical affinity column compression cubic cubic centimetre cylinder denote density displacement distance double earth electricity energy of position equilibrium experiments fact fall fluid focus force of gravity force tending friction gases glass grammes hence increase instance kilogrammes latent heat law of motion length let us suppose liquid luminous mass means mercury metres per second miles mirror molecular momentum moving force oscillation particles pendulum piston plane plate pressure produce proportional ray of light represent resistance rest side solid sound space passed specific gravity specific heat square centimetre steam stone string substance temperature thermometer tube unit upwards vapour various velocity of 98 vertical vessel vibration visible energy visible motion volume wave wave-length weight whole zinc
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