electron mass: Numerical value: 9.109 383 7015 x 10-31 kg : Standard uncertainty: 0.000 000 0028 x 10-31 kg : Relative standard uncertainty: 3.0 x 10-10: Concise form 9.109 383 7015(28) x 10-31 kg : Click here for correlation coefficient of this constant with other constants electron mass: 9.109 383 7015 (28) × 10 −31 kg: 3.0 × 10 −10 a f proton mass: 1.672 621 923 69 (51) × 10 −27 kg: 3.1 × 10 −10 a f neutron mass: 1.674 927 498 04 (95) × 10 −27 kg: 5.7 × 10 −10 a Bohr radius When charged particles move in electric and magnetic fields the following two laws apply: {{Physical constants|e|ref=only}} NIST publishes the CODATA value of the elementary charge. Together with the particle's initial conditions, it completely determines the particle's motion in space and time in terms of This differential equation is the classic equation of motion of a charged particle in vacuum. CODATA wurde um 1966 vom Internationalen Wissenschaftsrat (International Council for Science) gegründet. The charge-to-mass ratio of an electron may also be measured with the Measurements of the Zeeman effect commonly involve the use of a Rearranging, it is possible to solve for the charge-to-mass ratio of an electron as Mass equivalent of the energy of a photon at the peak of the spectrum of the cosmic microwave background radiation (0.235 meV/c 2) 10 −36: 1.8 × 10 −36 kg One eV/c 2, the mass equivalent of one electronvolt: 3.6 × 10 −36 kg Electron neutrino, upper limit on mass (2 eV/c 2) 10 −31: 9.11 × 10 −31 kg And More…Click to email this to a friend (Opens in new window) Often, the charge can be inferred from theoretical considerations, so that the charge-to-mass ratio provides a way to calculate the mass of a particle. Evenifa result is labeled with a “15” identifier, it can be safely It turns out that gravitational forces are negligible on the subatomic level, due to the extremely small masses of subatomic particles. electron charge to mass quotient: Numerical value -1.758 820 010 76 x 10 11 C kg-1: Standard uncertainty: 0.000 000 000 53 x 10 11 C kg-1: Relative standard uncertainty: 3.0 x 10-10: Concise form -1.758 820 010 76(53) x 10 11 C kg-1 : Click here for correlation coefficient of this constant … For the electron mass, u r (m e) = 3.0 × 10 −10.
I gather a bunch up each week and answer them here.The Guide to Space is a series of space and astronomy poddcasts by Fraser Cain, publisher of Universe TodayEpisode 678: Q&A 126: When Did Mars' Dynamo Shut Off? Contribute to JelleWestra/CODATA development by creating an account on GitHub. In general, a result considered for possible inclusion in a CODATA adjustment is identified by the institution where the workwasprimarilycarriedoutandbythelasttwodigitsofthe year inwhichit was published in an archival journal. 1.672 621 923 69 (51) x 10 -27 kg. Often, the charge can be inferred from theoretical considerations, so that the charge-to-mass ratio provides a way to calculate the mass of a particle.
The 2014 value of the fine-structure constant a has a relative uncertainty of 2.3 × 10 ‑10, a reduction by a factor of 1.4. # CODATA This package contains all the CODATA constants, uncertainties and units [1]. µ MASS 2010 CODATA (MOHR 12) gives the conversion factor from u (atomic mass units, see the above datablock) to MeV as 931.494 061(21). electron mass in u: Numerical value: 5.485 799 090 65 x 10-4 u : Standard uncertainty: 0.000 000 000 16 x 10-4 u : Relative standard uncertainty: 2.9 x 10-11: Concise form 5.485 799 090 65(16) x 10-4 u : Click here for correlation coefficient of this constant with other constants Some background: CODATA stands for Committee on Data for Science and Technology. In 1897, the mass-to-charge ratio of the In some experiments, the charge-to-mass ratio is the only quantity that can be measured directly. Because this is a ratio of like-dimensioned physical quantities, it is a dimensionless quantity, a function of the dimensionless physical constants, and has numerical value independent of the system of units, namely:
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codata electron mass