1. [-/1 Points] DETAILS OSCOLPHYS2016 30.2.WA.003. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Alpha particles are projected toward a gold foil from a distance that is sufficiently large to consider the Coulomb force negligible. The gold nuclei have 118 neutrons and 79 protons. If a 3.35 MeV alpha particle has a scattering angle of 180 and the gold nucleus does not recoil, determine the distance of closest approach of the alpha particle. m Additional Materials Reading2. [-l1 Points] DETAILS OSCOLPHYSZO16 30.2.WA.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER In Millikan's oil-drop experiment, one looks at a small oil drop held motionless between two plates. Take the voltage between the plates to be 2315 V, and the plate separation to be 2.28 cm. The oil drop (of density 0.810 g/cm3) has a diameter of 4.40 x 10'6 m. Find the charge (in C) on the drop. :1 C Additional Materials L] Reading 3. [/1 Points] OSCOLPHYSZO1630.2.WA.001. ASK YOUR TEACHER PRACTICE ANOTHER In an alpha particle scattering experiment, it is determined that the ratio of the crosssectional area of the target nucleus to that of the atom is 320 X 109. Determine the radius of the nucleus (in m), if the radius of the atom is 1.45 x 10'10 m. E m Additional Materials L3 Reading 4. [/1 Points] DETAILS OSCOLPHYSZO16 30.3.WA.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER For an advanced lab project, you are studying an unknown hydrogen-like atom. For these atoms, you determine that as excited atoms de-excite, the n = 3 > 2 transition emits a wavelength of 1.823 x 10'8 m and the n = 4 > 2 transition emits a wavelength of 1.350 x 1038 m. Determine the wavelength (in m) of light emitted in the n = 4 > 3 transition. E m Additional Materials L1 Reading 5. [-/1 Points] DETAILS OSCOLPHYSZO16 30.3.WA.014.TUTORIAL. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You discover a new type of microscopic, atom-like object. The energy levels for this object are given by E,7 = E1 , where E1 = 28.0 eV. For this new object, determine the n following. (a) excitation energy (in eV) of the object in the third excited state eV H (b) amount of energy (in eV) required to cause an object in the third excited state to become unbound eV H (c) maximum number of different energy photons emitted as the object deexcites from the third excited state to the ground state (assuming all available transitions are possible) (d) maximum and minimum wavelength photons (in nm) emitted when the object de-excites from the third excited state to the ground state ii? Tutorial Additional Materials L] Reading 6. [-/1 Points] DETAILS OSCOLPHYS2016 30.4.WA.023. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An x-ray tube has an applied voltage of 465 kV. (a) What is the most energetic x-ray photon it can produce? Express your answer in electron volts. ev (b) Find the wavelength (in nm) of such an x-ray. nm Additional Materials Reading