2011年4月28日 · V is used for electromotive force, eV is energy and actually means the energy gained by an electron moving through a 1 V potential difference. So you can't really convert between the two. Perhaps it would be more useful to picture V …

2016年9月25日 · What potential difference is needed to give a helium nucleus (Q = 3.2 × 10-19 C) 50 keV of kinetic energy? Homework Equations V=U/Q 3.2 × 10-19 C = 2e The Attempt at a Solution I was quite sure I had the right answer but it keeps saying I'm wrong? V …

2010年9月30日 · An x-ray field at a point P contains 7.5 x 10^8 photons /m^2-sec-keV uniformly distributed from 10 to 100 keV. a.) What is the photon flux density at P? b.) What would the photon fluence in one hour? c.) What is the corresponding energy fluence in SI units? my work: a.) 7.5 x 10^8 photons/ (m^2-sec-keV) * (100- 10 keV) = 8.3 x 10^6 photons/(m^2 ...

2014年6月10日 · Homework Statement The J/Ψ has mass 3097 MeV, width 87 keV and equal branching ratios of 6% to e+e− and µ+µ− final states. What would you expect for these branching ratios if the J/Ψ decayed only electromagnetically? What does this tell you about the “strength” of the strong interaction in...

2015年5月6日 · Homework Statement The kinetic energy (in keV) of the alpha particle, when the nucleus 84210Po at rest undergoes alpha decay, is A 5319 B 5422 C 5707 D 5818 Homework Equations ## E = mc^2 ## Kinetic energy ## = mv^2/2 ## The Attempt at a Solution alpha particle is emission of helium nucleus...

2009年3月1日 · A Fe nucleus at rest emits a 14.0-keV photon. Use conservation of energy and momentum to deduce the kinetic energy of the recoiling nucleus in electron volts. (Use Mc 2 = 8.60E-9 J for the final state of the Fe nucleus.) what I have so far is... E = pc because E >> photon rest energy , which = 0 eV P = E/C = 7.476 E-24 P 1 = P 2 I'm not sure ...

2010年10月1日 · An x-ray field at a point P contains 7.5 x 10^8 photons/m^2-sec-keV, uniformly distributed from 10 to 100 keV. a.) What is the photon flux density at P? b.) What would be the photon fluence in one hour? c.) What is the corresponding energy fluence in SI units? work shown: a.) 7.5 x 10^8 photons/m^2-sec-keV x (100 keV- 10 keV)= 6.75 x 10^10 ...

2011年2月22日 · An excited iron nucleus (Fe) of mass 57u decays to its ground state with the emission of a photon. The energy available from this transition is 14.4 keV. By how much is the photon energy reduced from the full 14.4 keV as a result of having to share energy with the recoiling atom? The Attempt at a Solution

2010年10月13日 · 1eV=1.6*10-19 j m e =9.11*10-31 kg Homework Equations relastic energy equaltion. The Attempt at a Solution i converted the total work to total energy E total =8*10-15 then i set E total =(mc 2)/(1-(v/c) 2) 1/2 when i try solving it i keep getting sqrt of a negative # could someone tell me where I am going wrong

2014年4月11日 · \\1\textrm{ eV}=1.6\textrm{E-19 J}[/tex] The Attempt at a Solution I correctly determined the ionization energies for the L and M subshells (11.7 and 10.0 keV respectively. However, I am calculating the value for the N subshell in the exact same way, but my homework tells me the answer is incorrect. Here are my calculations for the L shell...