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# Topic: Orders of magnitude (mass)

###### In the News (Sun 26 May 19)

 Orders of magnitude   (Site not responding. Last check: 2007-10-22) More precisely, the order of magnitude of a number can be defined in terms of the logarithm of the number to the base of 10, usually as the integer part of the logarithm. The order of magnitude of a number may also be defined as the exponent of the power of 10 when the number is represented using scientific notation. For example, an accurate order of magnitude estimate for the human population of the Earth in the year 2000 is 10 billion. www.sciencedaily.com /encyclopedia/orders_of_magnitude   (552 words)

 Orders of magnitude An order of magnitude is a factor of ten. Orders of magnitude are quite easily and commonly described through the use of scientific notation and powers of ten. SI units are used together with SI prefixes: these were devised with orders of magnitude in mind. www.ebroadcast.com.au /lookup/encyclopedia/or/Orders_of_magnitude.html   (280 words)

 Encyclopedia: Orders of magnitude (time)   (Site not responding. Last check: 2007-10-22) An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. Orders of magnitude (time) The geologic timescale is used by geologists and other scientists to describe the timing and relationships between events that have occured during the history of the Earth. Thus the order of magnitude of 400 is 2. www.nationmaster.com /encyclopedia/Orders-of-magnitude-(time)   (2409 words)

 Orders of magnitude (mass) Mass of a hydrogen atom = 1.66 yg The pages linked in the right-hand column contain lists of masses that are of the same order of magnitude (power of ten). Orders of magnitude of other quantities: time, length, area, volume www.ebroadcast.com.au /lookup/encyclopedia/or/Orders_of_magnitude_(mass).html   (111 words)

 Facts about topic: (Orders of magnitude (mass))   (Site not responding. Last check: 2007-10-22) Mass using SI (A tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors) prefixes (additional info and facts about prefixes) Mass of Saturn (A giant planet which is surrounded by three planar concentric rings of ice particles; 6th planet from the sun) Mass of the Sun (A typical star that is the source of light and heat for the planets in the solar system) = 2000 Yt approx. www.absoluteastronomy.com /encyclopedia/o/or/orders_of_magnitude_(mass).htm   (2378 words)

 Encyclopedia: Orders of magnitude (speed)   (Site not responding. Last check: 2007-10-22) More precisely, the order of magnitude of a number can be defined in terms of the decimal logarithm, usually as the integer part of the logarithm. For example, an order of magnitude estimate for a variable between about 3 billion and 30 billion (such as the human population of the Earth) is 10 billion. For extremely large numbers, a generalized order of magnitude can be based on their double logarithm or super-logarithm. www.nationmaster.com /encyclopedia/Orders-of-magnitude-%28speed%29   (2021 words)

 Wikinfo | Orders of magnitude (mass)   (Site not responding. Last check: 2007-10-22) mass of a water molecule ≈ 30 yg Uncertainty in the mass of the prototype kilogram: 2 μg mass of a grain of sand ≈ 0.3 - 13 mg www.wikinfo.org /wiki.php?title=1_E24_kg   (494 words)

 Orders of magnitude/Talk - Wikipedia I believe they are often called "orders of magnitude of length". What we could do though is to break this list up and put the length part on length, the mass part on mass etc., under a headline of "orders of magnitude of length" or similar. Maybe we should do both: put it on length, together with nice examples for every order of magnitude, and keep it here as a general reference table. nostalgia.wikipedia.org /wiki/Orders_of_magnitude/Talk   (1430 words)

 Orders of magnitude (mass) - Wikipedia, the free encyclopedia Mass equivalent of a calorie; increase in mass by heating one gram of water by 1 °C Lethal dose of botulin toxin (the deadliest substance known) - about 200 pg/kg of body mass, so a 15 ng dose would kill almost anybody. Uncertainty in the mass of the prototype kilogram (2 micrograms) www.wikipedia.org /wiki/1_E24_kg   (366 words)

 Mass Spectrometry Sample Requirements   (Site not responding. Last check: 2007-10-22) With a peptide of molecular weight 2000 for which the molecular ion could be measured with picomole amounts, as much as two orders of magnitude more sample could be needed to obtain a good tandem mass spectrum. Since the current technology for tandem mass spectrometric sequencing requires peptide fragments of 25-30 amino acids or less, sequencing of a protein requires that it be cleaved into smaller fragments. Two orders of magnitude improvement in instrument sensitivity does not necessarily directly translate to two orders of magnitude lower sample requirement, however, since sample manipulation limitations become more significant with extremely small samples. www2.musc.edu /Pharm/msge.html   (681 words)

 More on Mass Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. One of the consequences of the equivalence of inertial mass and passive gravitational mass is the fact, famously demonstrated by Galileo Galilei, that objects with different masses fall at the same rate, assuming factors like air resistance are negligible. Classically, active and passive gravitational mass were equivalent as a consequence of Newton's third law, but a new axiom is required in the context of relativity's reformulation of gravity and mechanics. www.artilifes.com /mass.htm   (2870 words)

 Orders of magnitude (mass) bei eLexi - das Onlinelexikon   (Site not responding. Last check: 2007-10-22) Orders of magnitude (mass) bei eLexi - das Onlinelexikon 1 atomic mass unit (amu) or Dalton (Da) ≈ mass of a hydrogen atom ≈ 1.6605402 yg mass of a grain of sand ≈ 0.3–13 mg www.elexi.de /en/o/or/orders_of_magnitude__mass_.html   (850 words)

 Evolution: Library: The Current Mass Extinction Is the biosphere today on the verge of anything like the mass extinctions of the geological past? Increasingly, researchers are doing the numbers, and saying, yes, if present trends continue, a mass extinction is very likely underway. For along with that species richness, the ecosystem is likely to loose much of its ability to provide many of the valuable services that we take for granted, from cleaning and recirculating air and water, to pollinating crops and providing a source for new pharmaceuticals. www.pbs.org /wgbh/evolution/library/03/2/l_032_04.html   (976 words)

 Mass - Energy Conversion in Chemical Reactions Then the mass "defect" (as it is called) 4.7 x 10^-12 mol, or multiplying by Avogadro's number = 6.023 x 10 ^23 yields 3 x 10 ^12 atoms or molecules of the substance. Although it would be technologically possible to measure the mass defect using high resolution, high precision mass spectrometry, no one really cares except in some very specific areas of nuclear physics. However, to be correct in the mass balance, the mass of oxygen reacted should be counted, in which case the mass of reactants = mass of products. www.newton.dep.anl.gov /askasci/chem03/chem03534.htm   (1058 words)

 rest mass In special relativity, rest mass is an obsolete term used to describe what is today simply referred to as mass. (formerly called "mass", but now called energy) increases with velocity (v), and the rest mass m is the inertial mass at v=0, which corresponds to the classical notion of mass. The terms rest mass and relativistic mass can be still be found in elementary textbooks and popularisations of relativity, but their use is depreciated in graduate-level physics. www.fact-library.com /rest_mass.html   (130 words)

 steam rocket factor 1000 Orders of magnitude reduction in costs are possible when compared to all processes requiring electrolysis for the production of rocket fuels or propellants and to all electric propulsion systems. Estimates suggest 20 to 100 tons of mass for this architecture, launched from earth, would be able to return 14,000 tons per year, and 140,000 tons of mass to LEO during the operational lifetime (reference 3,4). The origin of the "orders of magnitude" lies predominantly in the hardware needed for electrolysis for chemical propulsion. www.neofuel.com /moonice1000   (3152 words)

 Solar mass   (Site not responding. Last check: 2007-10-22) In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. It is equal to the mass of the Sun. The solar mass is 333,000 times the mass of the Earth. www.therfcc.org /solar-mass-30183.html   (73 words)

 Polariton lasing vs. photon lasing in a semiconductor microcavity -- Deng et al. 100 (26): 15318 -- Proceedings of the ... is on the order of 10 meV (1 eV = 1.602 density by an order of magnitude for a given polariton population. is estimated to be of the order of unity. www.pnas.org /cgi/content/full/100/26/15318   (4205 words)

 Orders of magnitude (volume): Definition and Links by Encyclopedian.com - All about Orders of magnitude (volume) Orders of magnitude (volume): Definition and Links by Encyclopedian.com - All about Orders of magnitude (volume) The pages linked in the right-hand column contain lists of volumes that are of the same order of magnitude (power of ten). Orders of magnitude of other quantities: time, length, area, mass www.encyclopedian.com /or/Orders-of-magnitude-(volume).html   (115 words)

 Kosovo: Orders of Magnitude - by Adam Jones It should be a priority for investigators." Evidence was adduced from an alleged eyewitness who said he had watched from his house as a process of mass burial of corpses unfolded before his stunned eyes: "I peeked through the fence and I saw a tractor hauling a wagon packed with bodies. They matter because orders of magnitude must always be factored into the policy and humanitarian equation. The term "genocide" must be used with care, but it is by no means the case that the destruction of a targeted population must be total in order to qualify. www.ideajournal.com /articles.php?id=24   (5865 words)

 The MSDS HyperGlossary: Mass Unit Conversions Strictly speaking, this is incorrect because weight varies with the force of gravity and mass does not. For example, an astronaut would be almost weightless in outer space, but his or her mass would be unchanged from that on Earth. Orders of magnitude for mass at free-definition.com goes all the way from 10 www.ilpi.com /msds/ref/massunits.html   (838 words)

 Orders of magnitude (power): Definition and Links by Encyclopedian.com - All about Orders of magnitude (power) The pages linked in the right-hand column contain lists of powers that are of the same order of magnitude (power of ten). Orders of magnitude of other quantities: energy[?], time, length, area, volume, mass See also SI, SI prefixes, SI base units, units, power, orders of magnitude, conversion of units www.encyclopedian.com /or/Orders-of-magnitude-(power).html   (103 words)

 Rxpress - 1 E2 kg - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-22) To help compare different orders of magnitude we list here masses between 100 and 1000 kilograms. See also masses of other orders of magnitude. 250 kg -- approximate mass of a lion www.rxpresspharmacy.com /wiki/index/1_E2_kg   (82 words)

 Orders of magnitude (mass) - Open Encyclopedia   (Site not responding. Last check: 2007-10-22) increase in mass by heating 1 ton of water by 100 °C Weight and mass conversion, weight of water, liters, volume units and capacity measures ca:Ordres de magnitud (massa) de:Größenordnung (Masse) ja:1 E8 kg zh-cn:质量单位 open-encyclopedia.com /1_E-3_kg   (309 words)

 Learn more about Orders of magnitude (mass) in the online encyclopedia.   (Site not responding. Last check: 2007-10-22) Learn more about Orders of magnitude (mass) in the online encyclopedia. 1 atomic mass unit (amu) ≈ mass of a hydrogen atom ≈ 1.66 yg Mass of the Milky Way galaxy = 2 × 10 www.onlineencyclopedia.org /o/or/orders_of_magnitude__mass_.html   (278 words)

 Based on body size, bacteria and elephants have similar metabolism, ecologists find But a new study led by Bai-Lian Li, professor of ecology at UC Riverside, shows that this is true only for organisms that are closely related evolutionarily and have body masses differing by no more than 6-7 orders of magnitude — about the difference in body mass between an elephant and a shrew. In other words, while metabolic activity per unit body mass varies within a group of organisms, such as mammals, it tends not to vary much when two diverse groups of organisms that differ greatly from each other in size are compared — such as bacteria and mammals. The new study posits, however, that living organisms are able to overcome the physical limitations imposed on them by their own physical properties and their external environment in order to maintain optimal, biochemical characteristics, such as the mass-specific metabolic rate the researchers studied. www.eurekalert.org /pub_releases/2005-10/uoc--bob101905.php   (694 words)

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