Elementary Physiography: An Introduction to the Study of NatureLongmans, Green & Company, 1899 - 427 σελίδες |
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Σελίδα 13
... attraction of the earth ( gravity ) . But because the weights of bodies are exactly proportional to their masses at any one place on the earth's surface ( weight increasing or diminishing as mass increases or diminishes ) , we regard ...
... attraction of the earth ( gravity ) . But because the weights of bodies are exactly proportional to their masses at any one place on the earth's surface ( weight increasing or diminishing as mass increases or diminishes ) , we regard ...
Σελίδα 20
... attraction exerted by the earth on all bodies , which gives rise to the weight of a body which is supported , and to the fall of a body that is unsupported . This attraction is called the attraction of gravitation or gravity ( Lat ...
... attraction exerted by the earth on all bodies , which gives rise to the weight of a body which is supported , and to the fall of a body that is unsupported . This attraction is called the attraction of gravitation or gravity ( Lat ...
Σελίδα 21
... attraction of gravitation at its surface would be twice as great . It may be said that such things as smoke , vapour ... attraction between them is diminished four times ; if the distance be trebled , the force of attraction is ...
... attraction of gravitation at its surface would be twice as great . It may be said that such things as smoke , vapour ... attraction between them is diminished four times ; if the distance be trebled , the force of attraction is ...
Σελίδα 22
... attraction being pro- portional to mass , yet it has ten times as much matter to move . It was at one time thought that a ten - pound weight would fall to the ground ten times as fast as a one - pound weight , that two bricks fastened ...
... attraction being pro- portional to mass , yet it has ten times as much matter to move . It was at one time thought that a ten - pound weight would fall to the ground ten times as fast as a one - pound weight , that two bricks fastened ...
Σελίδα 23
... attraction on the body . When we speak , therefore , of steam exerting a pressure of 40 lbs . on the square inch , we are using the word pound as a unit of force ; but when we talk of buying so many pounds of butter , we are using the ...
... attraction on the body . When we speak , therefore , of steam exerting a pressure of 40 lbs . on the square inch , we are using the word pound as a unit of force ; but when we talk of buying so many pounds of butter , we are using the ...
Συχνά εμφανιζόμενοι όροι και φράσεις
acid altitude angle Antarctic Antarctic Circle Arctic Arctic Circle Atlantic atmosphere axis barometer body calcium carbonate called carbon celestial equator celestial sphere centre circle coast currents declination delta density deposits depth distance earth earth's orbit east ecliptic equal equator equatorial equinox evaporation Experiment fall fathoms feet flask force glacier globe heat Hence horizon inches increase iron land latitude lava length liquid magnet mass mercury meridian miles moon motion mountain move needle night north pole Northern Hemisphere OCEAN oxide oxygen parallel particles passing plane position pressure quantity rain rays regions right ascension rise river rocks rotation round side sidereal day silica solar day specific gravity spring stars stream substance sun's surface temperature thermometer Tropic Tropic of Cancer Tropic of Capricorn tube valley vapour velocity vernal equinox vertical volcano weight winds winter zenith
Δημοφιλή αποσπάσματα
Σελίδα 20 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Σελίδα 37 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Σελίδα 313 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.
Σελίδα 415 - All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
Σελίδα 356 - The Ram, the Bull, the heavenly Twins, And next the Crab the Lion shines, The Virgin and the Scales ; The Scorpion, Archer and He-goat, The Man that holds the watering-pot And Fish with glittering tails.
Σελίδα 317 - The zenith distance of a body is its angular distance from the zenith, measured on the vertical circle passing through the body from 0° to 90°. It is the complement of the altitude.
Σελίδα 258 - When there is not enough of clouds and wind to afford this degree of protection, dew begins to form, and by preventing the temperature of any leaf or flower from sinking below the dew-point, saves them all from destruction, unless, as when hoar-frost appears, the dew-point itself is below the freezing-point.