55.003453" Assignment \"Relativity. Quantum Physics\" A tau particle has a lifetime of 1.5>

I. 2. 3. 4. 5. 6. 7. 8. 9. 10. Assignment "Relativity. Quantum Physics" A tau particle has a lifetime of 1.5xIO 13 s measured at rest. The particle travels at a speed of 0.8c, where c is the speed of light. What is its lifetime measured in the laboratory frame of reference? (2K) A kaon particle has a lifetime of 1.2xIO-8 s measured at rest. At what speed must it travel to have a lifetime of 2.4xIO-8 s? (3A) A spacecraft passes a spherical space station. An observer in the spacecraft sees that the station minimum diameter is 250 m while the maximum diameter is 300 m. What is the spacecraft speed relative to the space station? (3T) A neutron rest mass is 1.68xIO 27 kg. It moves at a speed of 0.8c, where c is the speed of light. What are the neutron mass (2K) and kinetic energy (2K)? In a laboratory frame of reference, the kinetic energy of an electron is equal to three its rest energy. What is the electron speed relative to the laboratory? (3T) Find the momentum of a photon with a wavelength of 400 nm. (2K) Find the momentum of a photon with a frequency of 5.0x1014 Hz. (3A) Find the wavelength of a proton with a speed of 4.0x106 m/s. (3K) The work function for a lead surface is 4.25 eV. What is the minimum frequency of the radiation that will just eject an electron from the surface? (3A) The longest wavelength of light that will just eject electrons from a particular surface is 220.0 nm. What is the work function of this surface? (3T)