Elementary Physiography: An Introduction to the Study of NatureLongmans, Green & Company, 1899 - 427 σελίδες |
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Αποτελέσματα 6 - 10 από τα 81.
Σελίδα 40
... producing them , we can compare forces by comparing the momenta produced by them . The second law implies that each force acting on a body produces its own change of momentum of the body , inde- pendently of any other force or forces ...
... producing them , we can compare forces by comparing the momenta produced by them . The second law implies that each force acting on a body produces its own change of momentum of the body , inde- pendently of any other force or forces ...
Σελίδα 43
... produced in a body by a pressure or pull exerted by some other body , just the same change of momentum is produced in that other body in the opposite direction . Action and reaction together form the stress between the two bodies , i.e. ...
... produced in a body by a pressure or pull exerted by some other body , just the same change of momentum is produced in that other body in the opposite direction . Action and reaction together form the stress between the two bodies , i.e. ...
Σελίδα 44
... produced during the action of a stress . A beam is said to undergo a strain if compressed , or stretched , or bent , or dis- torted in any way . Illustrations of the third law of motion are found in the recoil of a gun , in the ascent ...
... produced during the action of a stress . A beam is said to undergo a strain if compressed , or stretched , or bent , or dis- torted in any way . Illustrations of the third law of motion are found in the recoil of a gun , in the ascent ...
Σελίδα 58
... producing QO and drawing ED parallel to P , we obtain a triangle , EOD , whose sides are parallel to the directions of the three forces . Now , we know that if three forces acting on a body keep it in equilibrium , and a triangle be ...
... producing QO and drawing ED parallel to P , we obtain a triangle , EOD , whose sides are parallel to the directions of the three forces . Now , we know that if three forces acting on a body keep it in equilibrium , and a triangle be ...
Σελίδα 67
... produced . Under the term " motion " we must understand the visible motion of sensible masses as well as the ... produces motion and does work by moving the particles of a body so as to make it expand , and the electric current does work ...
... produced . Under the term " motion " we must understand the visible motion of sensible masses as well as the ... produces motion and does work by moving the particles of a body so as to make it expand , and the electric current does work ...
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.