A particle with ____________ obeys the Pauli exclusion principle
a. zero rest mass
b. very high energy
c. half-integral spin
d. integral spin
e. charm
c
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Electron diffraction shows
a. that electrons behave like waves. b. the photoelectric effect. c. characteristic x-ray spectra. d. that electrons in atoms have only certain allowed energies.
When an atom loses an electron, it becomes
A) sublimated. B) dissociated. C) a plasma. D) an isotope. E) ionized.
The electron density in copper is 8.49 × 10^28 electrons/m3 . The electron charge is e = ?1.60 × 10^?19 C. When a 1.00 A current is present in a copper wire with a 0.40 cm2 cross-section, the electron drift velocity, in m/s, with direction defined relative to the current density, is
a. ?1.84 × 10^?6. b. +1.84 × 10^?6. c. ?1.84. d. ?5.43 × 10^5. e. +5.43 × 10^5.
The heat capacity at constant volume and the heat capacity at constant pressure have different values because:
A. heat increases the temperature at constant volume but not at constant pressure B. heat increases the temperature at constant pressure but not at constant volume C. the system does work at constant volume but not at constant pressure D. the system does work at constant pressure but not at constant volume E. the system does more work at constant volume than at constant pressure