What's the difference between gravity and weightless?

Gravity


Definition:

  • (a.) The state of having weight; beaviness; as, the gravity of lead.
  • (a.) Sobriety of character or demeanor.
  • (a.) Importance, significance, dignity, etc; hence, seriousness; enormity; as, the gravity of an offense.
  • (a.) The tendency of a mass of matter toward a center of attraction; esp., the tendency of a body toward the center of the earth; terrestrial gravitation.
  • (a.) Lowness of tone; -- opposed to acuteness.

Example Sentences:

  • (1) Urinalysis revealed a low pH, increased ketones and bilirubin excretion, dark yellowish change in color, the appearance of "leaflet-shaped" crystals and increased red blood cells and epithelial cells in the urinary sediment, increased water intake, decreased specific gravity and decreased sodium, potassium and chloride in the urine.
  • (2) Phycomyces sporangiophores respond to four distinct physical stimuli: gravity, light, stretch, and an avoidance stimulus.
  • (3) Human granulocytes from the peripheral blood of healthy donors were subjected to transient gravity sedimentation analysis in Ficoll density gradient columns (37 degrees C) containing different concentrations of Escherichia coli endotoxin-activated serum and medium 199.
  • (4) In contrast, large territories may reflect widespread motor-unit actions, advantageous in force development where fine movement control is less important, as in biting in the intercuspal position or opposing gravity.
  • (5) The ball sat up; gravity would bring it down again and, when it did, he would score.
  • (6) Recent data on smoking patterns in the USA are listed and the gravity of the effects of passive smoking is brought out.
  • (7) Data were obtained on hen-day egg production, egg weight, egg mass, egg specific gravity, Haugh units, feed consumption, and feed efficiency.
  • (8) Egg production and egg specific gravity were correlated to D3 level in a quadratic fashion.
  • (9) "I am not trying to minimise the gravity of these offences, just simply make the observation that a sense of proportion needs to be maintained.
  • (10) Five experiments were conducted using 36 dietary treatments to compare chloride salts and HCl as chemical sources of Cl for the adjustment of dietary Cl when using sodium aluminosilicate (SAS), to compare SAS to natural zeolites (clinoptilolite and mordenite), and to determine the appropriate level of dietary SAS for optimum egg specific gravity.
  • (11) Specific gravity was only intermittently affected by dietary salt removal.
  • (12) Host cells were isolated by enzymatic disaggregation of the tumor and fractionated by sedimentation velocity at unit gravity on a Ficoll gradient.
  • (13) Because the contribution of position represents the additive effect of gravity between two opposite positions, the contribution of gravity to perfusion heterogeneity in one position may be as little as 4%.
  • (14) Was he being put forward as the foremost literary novelist of his generation, one whose best-known work stands comparison with The Naked and the Dead , Gravity's Rainbow , American Pastoral , Beloved and Underworld ?
  • (15) Fully 45 of these patients (92%) were operated on in emergency conditions and the choice of the operation was imposed by the gravity of the lesions observed.
  • (16) A brief image from the television feed before the gravity of the situation became apparent – as a physio reaches and tries to turn over the stricken midfielder – was widely available, especially in postings from outside the UK, where the match was shown on other networks.
  • (17) The three-dimensional displacements of the center of gravity were computed by the integration of force plate data.
  • (18) The diagnosis of gravity rests on the measurement of the mean gradient by applying Bernouilli's equation and the point by point quadratic transformation of the transmitral velocity curve obtained by Doppler and the measurement of the mitral area either by measurement of the half-decrease time in pressure or by applying the continuity equation.
  • (19) Tabulations of the constituents, elemental compositions, specific gravities, and the photon and electron interaction characteristics of 64 materials are given together with recommendations of systems having useful simulation properties.
  • (20) Hyponatremia complicates ascitic hepatic cirrhosis with frequency and gravity related to the gravity of the cirrhosis itself.

Weightless


Definition:

  • (a.) Having no weight; imponderable; hence, light.

Example Sentences:

  • (1) It is concluded that brain is the organ which is subjected to short-term simulated weightlessness in the highest degree.
  • (2) The effect of repeated weightlessness exposures on maximal aerobic capacity was determined when seven healthy men (36-48 yr) underwent two 10-d bedrest (BR) periods in the -6 degrees headdown position, which were separated by a 14-d recovery period.
  • (3) It can be concluded that weightlessness produced no effect on the fish development, beginning with the stage of the axial complex formation.
  • (4) In weightlessness, "falls" were achieved using elastic cords running from a torso harness to the floor.
  • (5) These rats' swimming disability was similar to that of bilabyrinthectomized rats in normogravic condition and to that of normal rats immersed in water during weightlessness.
  • (6) The body reactions to weightlessness seem to prepare pronounced vestibulo-vegetative reflexes to threshold and subthreshold vestibular stimuli induced by head and body movements in flight.
  • (7) The changes discovered were evidently the result of functional underactivity of the skeletal muscles under conditions of weightlessness.
  • (8) The application of pharmacological agents, preventing the motion sickness syndrome in modelling the early stages of adaptation to weightlessness by means of 6-hour antiorthostatic influence (-15 degrees), does not exert a negative action on the human cardiovascular system.
  • (9) On their basis, including their own data, the authors discuss possible mechanisms of the sickness symptom-complex in the weightless state.
  • (10) Before effective countermeasures can be devised, a thorough knowledge of the extent, location, and rate of bone loss during weightlessness is needed from actual space flight data or ground-based disuse models.
  • (11) The mass disintegration of lymphocytes and accumulation of nuclear detritus in the thymus as well as neutrophil infiltration of the spleen can be attributed to the acute stress of the reentry and weightlessness--1 g transition stages.
  • (12) Virtually all these observations describe effects at the very onset of weightlessness.
  • (13) However, little is known about the early cardiovascular adaptive response to simulated weightlessness and the effects of varying degrees of head-down suspension.
  • (14) These results demonstrate that ANF and PRA which have opposite effects on aldosterone release and Na excretion, change in opposite sens during fluid shifts, to produce antinatriuresis in upright position, or natriuresis in experimental weightlessness.
  • (15) Mechanical properties (stress and strain) of bones from rats of different ages exposed to weightlessness, hypodynamia or hypokinesia were examined upon torsion.
  • (16) The resultant products were tested during short-term weightlessness aboard the aircraft-laboratory TU-104A.
  • (17) New data which demonstrated again that weightlessness induced symptoms specifically assoicated with blood redistribution and pressure increase in the jugular veins were obtained.
  • (18) In modes II, III and IV the direction of the nystagmus reversed during weightlessness.
  • (19) Chest radiographs were made after 10 s of a weightless flight trajectory aboard a NASA-Ames Research Center Learjet in both posterior-anterior and left lateral projections on five seated volunteers at residual volume, functional residual capacity, and total lung capacity.
  • (20) Cultures of the bacterium Escherichia coli were grown in the orbiting Biocosmos 2044 satellite in order to evaluate the effects of the space environment--weightlessness and heavy particle radiation--on growth parameters and energy metabolism, which have previously been reported to be affected, and on induction of the SOS response, which reflects DNA damage to the cell.

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