Electrons emerge from an electron gun with a speed of 2.0 × 106 m/s and then pass through a pair of thin parallel slits
Interference fringes with a spacing of 2.7 mm are detected on a screen far from the double slit and fairly close to the center of the pattern. What would the fringe spacing be if the electrons were replaced by neutrons with the same speed? (mel = 9.11 × 10-31 kg, mneutron = 1.67 × 10-27 kg)
A) 1.5 nm B) 1.5 µm C) 4.9 µm D) 1.1 µm E) 0.93 nm
B
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Nuclear Magnetic Resonance, NMR, is more commonly referred to as
A) MRI. B) NRA. C) CT-scan. D) MRT. E) CAT.
The square of the wave function represents the
A) position of the particle. B) velocity of the particle. C) probability of finding the particle. D) position of the particle as a function of time. E) probability density for finding particle.
What is one relationship of superconductors to magnets?
a. Superconductors draw in their own magnetic fields and thus attract magnets. b. Superconductors affect nearby magnetic fields. c. Superconductors expel their own magnetic fields and thus repel magnets. d. Superconductors have no more relation to magnetic fields than ordinary conductors. e. Superconductors can be used to create magnetic monopoles.
Addition by 1. Components: The figure shows three vectors and their magnitudes and relative directions. The magnitude of the resultant of the three vectors is closest to 
A. 19. B. 16. C. 13. D. 10. E. 7.0.