At what angle will the highest-order maximum appear for a wavelength of 412 nm using a grating with 435 lines per mm?
a. 46°
b. 64°
c. 1.1°
d. 68°
e. 90°
b
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A 15-?F capacitor and a 25-?F capacitor are connected in parallel, and charged to a potential difference of 60 V. How much energy is then stored in this capacitor combination?
a. 50 mJ b. 18 mJ c. 32 mJ d. 72 mJ e. 45 mJ
This photo shows a single star photographed by the Hubble Space Telescope. Why doesn't the star appear as a single, sharp point of light?
A) The wave properties of light make this type of blurring an unavoidable feature of any telescope. B) We are seeing a planetary system around the star. C) The image of the star is overexposed. D) The telescope was not properly focused when it took this photo.
Suppose the first excited vibrational state of a molecule is at 1.50 eV. If the potential is close to that of a simple harmonic oscillator, the energy of the ground state is
A) 0 eV B) 0.25 eV C) 0.30 eV D) 0.50 eV E) 0.75 eV
What effect, if any, does increasing the resistance in an RC circuit have on the charging of the capacitor?
a) The resistance has no effect on the charging of the capacitor, which is determined by the emf of the battery and the capacitance of the capacitor. b) Increasing the resistance causes the charging time to increase since the rate at which charges are moving to the capacitor increases. c) The charging time will increase as the resistance is increased because the rate at which charges are moving to the capacitor decreases. d) Increasing the resistance increases the charging time since the emf of the battery will be reduced. e) Increasing the resistance decreases the charging time since the emf of the battery will be reduced.