Module 4 Test PHYS 1402 - WTCQuestion 1Which one of the following statements concerning the plum-pudding model of the atom is false?B. The plum-pudding model was proven correct in experiments by Ernest Rutherford. Question 2Why was it necessary for Bohr to require that electrons remain in stationary orbits?E. Classical physics predicts that the electron should spiral into the nucleus. Question 3According to the quantum mechanical picture of the atom, which one of the following is a true statement concerning the ground state electron in a hydrogen atom?E. The ground state electron has zero orbital angular momentum. Question 4Name the physicist credited with the following statement: No two electrons in an atom can have the same set of values for the four quantum numbers.B. Wolfgang Pauli Question 5How many neutrons are there in the nucleus ?A. 79 Question 6Which one of the following descriptive terms does not apply to nuclear forces?E. long-range Question 7Which one of the following expressions relates the terms binding energy and mass defect?A. E0 = ( m)c2Δ Δ Question 8Complete the following sentence: In a + decay process, the emitted particle isβC. a positron. Question 9If a spaceship is approaching the earth at 0.16c and a message capsule is sent toward it at 0.47c relative to the earth, what is the speed of the capsule relative to the ship?Answer:0.586Question 10A neutral pi-meson is a particle that can be created by accelerator beams. One such particle lives 1.40 x 10-16 s as measured in the laboratory, and 0.840 x 10-16 s whenat rest relative to an observer. What is the kinetic energy in MeV of the particle, given its rest mass energy is 135 MeV?Answer:90Question 11UV radiation having a wavelength of 145 nm falls on gold metal, to which electrons are bound by 4.82 eV. What is the maximum kinetic energy of the ejected photoelectrons?Answer:3.75Question 12What is the velocity of a 0.44 kg billiard ball if its wavelength is 7.10 cm? In m/s.Answer:2.12E-32Question 13Compared to clocks in a stationary reference frame, clocks in a moving reference frame runa.
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