At what angle will the highest order (m value) maximum appear for a wavelength 400 nm using a grating with 600 lines per mm?
a. 54°
c. 74°
b. 90°
d. 36°
C
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Power: A series RLC circuit has a 100-? resistor, 2.0-mH inductor and a 4.0-?F capacitor connected across a 120-V rms ac source at 1000/? Hz. What is the power factor of this circuit?
A. 0.54 B. 0.64 C. 0.74 D. 0.84 E. 0.94
Theoretical physicists have had the least success in combining which force with the electromagnetic force?
a. strong nuclear force b. weak nuclear force c. gravitational force d. electrical Coulomb force
A 10-kg object is dropped from rest. After falling a distance of 50 m, it has a speed of 26 m/s. What is the change in mechanical energy caused by the dissipative (air) resistive force on the object during this descent?
a. ?1.3 kJ b. ?1.5 kJ c. ?1.8 kJ d. ?2.0 kJ e. ?2.3 kJ
When a capacitor is fully charged, the current through the capacitor in a direct-current circuit is
a. zero. b. at its maximum value. c. equal to the current in a resistive circuit in parallel with the capacitor circuit. d. greater than the current in a resistor that is farther from the battery than the capacitor. e. zero if it is the only capacitor, but maximum if there is another capacitor in series with it.