If the mass of the electron neutrino is 2.2 eV/c 2, what is the lowest temperature at which it could be formed from thermal interactions?
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- A muon, or mu meson, has the same charge as an electron, but is 207 times as massive. a) Compared with electron-positron pair production, the pair production of a muon and antimuon requires a photon of what energy? E = _____ MeV b) What would be the minimum frequency for such a photon? f = _________ HzNow the energy of a neutrino is measured at a specific time. If the uncertainty in the time measurement is 2.31 x 10-24 seconds, what is the minimum uncertainty in the energy?A new element has been created artificially. It is named Elementy McFacium. The most common isotope of McFacium has 153 protons and 277 neutrons. The mass of this isotope of the new element is 402,188.91 MeV/c^2. What is the total mass deficit for the nucleus? Hint: The new element is not made as an ion! Use the mass of hydrogen atoms instead of protons. (Answer in atomic mass units u)
- The unified atomic mass unit, denoted u, is defined to be 1 u = 1.6605 × 10^-27 kg. It can be used as an approximation for the average mass of a nucleon in a nucleus, taking the binding energy into account. How much energy, in megaelectron volts, would you obtain if you completely converted a nucleus of 8 nucleons into free energy?A charged droplet is released between 2 vertical plates with an electric field across them. Calculate the deflection (z) of the droplet by the time it leaves the electric field region. You should first calculate the time spent by the droplet accelerating under the action of gravity Droplet mass: 3.5x10-15 kg Droplet charge: 861x10-19 C Gap (d): 0.1 m Length of plates (L): 0.3 m Voltage (VA-VB): 5 V Acceleration due to gravity 9.8 ms-2Compare the wavelength of 1.0-MeV gamma-ray photon with that of a neutron having the same kinetic energy. (for a neutron, mc² = 939 MeV)