Electron is to the beta rays what a photon is toQuestion 14Answera.None of theseb.Radiationc.Speedd.Light

calculate the velocity of the electron as a percentage of the speed of light.round your answer to the first decimal place.

Calculate the de Broglie wavelength of an electron moving at 1/137th the speed of light

What is the value of speed of γ-rays in vacuum ?

18. Which of the following is really just a high-energy electron?1 pointbeta particleprotongamma rayalpha particle

1. A beta particle with a mass of 9.11 x 10^-31 kg is moving at a velocity of 2.5 x 10^7 m/s. Calculate its kinetic energy. 2. An alpha particle with a mass of 6.64 x 10^-27 kg is moving at a velocity of 1.2 x 10^6 m/s. Calculate its momentum. 3. A gamma ray photon has an energy of 2.5 MeV (mega-electron volts). Calculate its wavelength in meters. 4. A radioactive substance has a decay constant of 0.02 s^-1. Calculate its half-life. 5. A beta particle with a charge of -1.6 x 10^-19 C passes through a region of air with a mass of 0.1 kg. Calculate the exposure to ionizing radiation in C/kg. 6. An alpha particle with an energy of 5 MeV is incident on a material. If the stopping power of the material is 2 MeV/cm, calculate the range of the alpha particle in the material. 7. A gamma ray photon with an energy of 1 MeV is absorbed by a material, depositing 2 x 10^-14 J of energy. Calculate the absorbed dose in Gy (gray). 8. A radioactive source has an activity of 5000 Bq (becquerels). If the decay constant is 0.05 s^-1, calculate the number of radioactive atoms present. 9. A beta particle with an energy of 2 MeV is emitted from a radioactive source. If the mass of the beta particle is 9.11 x 10^-31 kg, calculate its velocity. 10. An alpha particle with an energy of 4 MeV is incident on a target material. If the cross-sectional area for interaction is 5 x 10^-15 m^2, calculate the number of alpha particles interacting per second.