Milankovich cycles
Milankovich cycles Cyclical changes in the rotation and orbit of the Earth that
Milankovich correlated to climatic effects. There are three cycles: changes in the eccentricity of the Earth's orbit, altering the distance between Earth and the Sun at
aphelion and
perihelion, with a period of about 100 000 years; variations in the tilt of the Earth's rotational axis (obliquity of the ecliptic), with a period of about 40 000 years; and a movement (wobble) in the angle by which the axis of the Earth's rotation is tilted in respect of the orbital plane, altering the seasons at which aphelion and perihelion occur (precession of the equinoxes), with a period of about 21 000 years. Climatic changes associated with Milankovich cycles may be recorded in
cyclic sedimentation.
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Specific gravities of tektites from Guangdong, China.
Magazine article from: Georgia Journal of Science; 6/22/2002; ; 700+ words
; The mean specific gravity of 288 tektites...The specific gravities of 49 disc-shaped...this paper, the specific gravities of tektites from...between specific gravity and tektite mass...determining the specific gravities (SG-20[degrees...each specific ...
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Answering your questions on odd urine specific gravities, sendout handling fees, osmotic fragility method, and blood culture contamination rate. (Tips from the clinical experts).(Brief Article)
Magazine article from: Medical Laboratory Observer; 12/1/2001; ; 700+ words
; Odd urine specific gravities Q: In our lab, when we have a specific gravity < 1.005, we check it out on a refractometer...Clinitek 200 for our dipstick testing. A: When specific gravity readings greater than 1.035 by refractometer...
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A comparison of reagent strips and the refractometer for measurement of urine specific gravity in hospitalized children.
Magazine article from: Pediatric Nursing; 9/1/1998; ; 700+ words
; Pediatric nurses use specific gravity to assess hydration status in...refractometer measures urine specific gravity by analyzing the amount of light...nitrite, ieukocytes, and specific gravity. They require a small amount...
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Urine specific gravity, refractive index, osmolality: Which would you choose?
Magazine article from: DVM; 11/1/1998; ; 700+ words
; ...1400 mOsm/kg; 2. urine specific gravity =1.025 by urinometer; 3...Knowledge of urine osmolality or specific gravity is extremely helpful when attempting...routine evaluation of urine specific gravity involves interpretation of other...
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 "Wisconsin State Journal (Madison, WI)")
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RELY ON SPECIFIC GRAVITY TO TELL YOU WHY WOOD FLOATS.(LOCAL)(CURIOSITIES)(Column)
Newspaper article from: Wisconsin State Journal (Madison, WI); 11/29/2007; 481 words
; ...people use a measure of density called specific gravity, which is the ratio of wood's density...density of water, Bowe said. Water has a specific gravity of 1.0, while most types of wood have a specific gravity less than that. For example...
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Effects of Alfalfa Particle Size and Specific Gravity on Chewing Activity, Digestibility, and Performance of Holstein Dairy Cows
Magazine article from: Journal of Dairy Science; 11/1/2004; ; 700+ words
; ...alfalfa particle size and functional specific gravity (FSG) on chewing activity, digestibility...words: particle size, functional specific gravity, physically effective...Abbreviation key: FSG = functional specific gravity, GM = geometric mean...
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Reporting specific gravity urine with pregnancy test.(Tips from the clinical experts)
Magazine article from: Medical Laboratory Observer; 6/1/2008; ; 583 words
; Reporting specific gravity urine with pregnancy test Q Our current...practice has been to report the urine-specific gravity with every urine pregnancy...one else does this. Is reporting the specific gravity unnecessary? Is this a known...
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Proportioning Workable Concrete Mixtures with Specific Gravity of Cement-Water Paste
Magazine article from: ACI Materials Journal; 9/1/2005; ; 700+ words
; ...respective unit weights and specific gravities relative to age and maturity...water paste. Therefore, its specific gravity (SPG) is the major strength...of concrete mixtures at any specific age and curing regime. The...
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Effect of seasonality on bulk density, moisture content, and specific gravity of loblolly pine tree-length pulpwood logs in southern Arkansas.
Magazine article from: Forest Products Journal; 12/1/2005; ; 700+ words
; ...MC) also varied by season but specific gravity was constant within a stand throughout...readily calculated if we know its specific gravity (based on ovendry weight...Small variations from the true specific gravity or moisture content can...
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Automatic is more accurate: automation improves test procedures for determining the bulk specific gravity of fine aggregate.(EQUIPMENT HIGHLIGHT)(Buyers Guide)
Magazine article from: Asphalt Contractor; 4/1/2005; 700+ words
; Determining the bulk specific gravity of fine aggregate is important when designing hot mix asphalt. The bulk specific gravity is used in calculating the...current method of determining dry bulk specific gravity (Gsb)--AASHTO T 84...
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specific gravity
Book article from: The Columbia Encyclopedia, Sixth Edition
...near equality between specific gravity and density...Determining Specific Gravity A number of experimental...determining the specific gravities of solids, liquids...mass and volume. The specific gravity of the solid is the...determining the specific ...
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specific-gravity determinations
Book article from: A Dictionary of Earth Sciences
specific-gravity determinations In soils, for engineering computations, grains are...excluding air, to relate the mass of the sample to its volume. The specific gravity of solid rocks can be determined using a Walker balance, and can...
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Zero Gravity
Book article from: Space Sciences
Zero Gravity The effects of gravity are so commonplace that people rarely...living under the pressure of Earth's gravity (1 G), and so when the amount of...principles apply to jet planes when flying specific courses. Probably the most famous...
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gravity separation
Book article from: A Dictionary of Earth Sciences
gravity separation A concentration process based on differences in specific gravity between ore and gangue minerals. Separation is performed by shaking tables, Humphreys spirals, jigs, hydroclones, dense media , etc.
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specific heat
Book article from: The Columbia Encyclopedia, Sixth Edition
...be known in order to give a precise value for the specific heat. The heat capacity of water at 15°C is a frequently used value. Like specific gravity, specific heat is a dimensionless quantity, i.e., a pure...
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