The possible cosmological variation of the proton-to-electron mass ratio μ = m p /m e was estimated by measuring the H 2 wavelengths in the high-resolution spectrum of the quasar Q 0347-382. Our analysis yielded an estimate for the possible deviation ofμ value in the past, 10 Gyr ago...
ELECTMECH ELECTMG ELECTRA ELECTRIC ELECTRO ELECTRO-OPTINT Electron-Proton ELECTY ELECTZ ELED ELEE ELEEAC ELEED ELEF ELEGANT ELEGI ELEK ELEKTRA ELEL ELEM ELEN ELENA ELENA-NERVES-2 ELENCO ELENS ELEO ELEP ELEPL ELEPS ELEQ ELER ELES ▼
The possible cosmological variation of the proton-to-electron mass ratio μ = m p /m e was estimated by measuring the H2 wavelengths in the high-resolution spectrum of the quasar Q 0347-382. Our analysis yielded an estimate for the possible deviation ofμ value in the past, 10 Gyr ago:...
一道英文的物理题When a proton captures an electron,a photon with anenergy of 13.6 eV is emitted.What is the frequency of thisphoton?Does it lie in,above,or below the visible range?答案 当一个质子捕获一个电子时,会发射出一个具有13.6电子伏能量的光子,请问这个光子的频率是多少?它是否在可见光...
What is the electromagnetic/gravitational force between a proton and an electron 1 \times 10^{-11}\ m apart? Does the electromagnetic force move photons? Are fermions affected by the strong force? Is magnetism the strong nuclear force?
An electron has a speed of 0.75c. Find the speed of a proton that has (a) the same kinetic energy as the electron and (b) the same momentum as the electron. Which effect on atomic size is more significant, an increase in nuclear charge across a period or an in...
Neutrinos are subatomic elementary particles, similar to an electron or proton, except they have less mass and no electrical charge. You can’t see, feel, hear or smell them, but neutrinos are all around us. And they’re passing through your body at a rapid rate – 100,000 billion of ...
Electron capture is the process by which an orbital electron is absorbed in the nucleus, destroys a nuclear proton and creates a neutron. Spontaneous fission involves the splitting of a nucleus into two or more smaller nuclei.In order to simplify the 238U problem, let’s ignore the spontaneous...
An electron and a proton have charges of equal magnitude but an opposite sign of 1.6 x 10^-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 5.29 x 10^-11 m, what are the magnitude and direction of the electrostatic force ...
electron c. proton d. neutron An atomic nucleus at rest decays radioactively into an alpha particle and a nucleus smaller than the original. What will be the speed of this recoiling nucleus if the speed of the alpha particle is 3.20E+05 m/s? Assume the recoiling nucleus has ...