Which of the following statements best describes the two principle advantages of telescopes over eyes?
A) Telescopes can collect far more light with far better angular resolution.
B) Telescopes can collect far more light with far greater magnification.
C) Telescopes collect more light and are unaffected by twinkling.
D) Telescopes have much more magnification and better angular resolution.
A) Telescopes can collect far more light with far better angular resolution.
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In the periphery of our vision, we are
A) more sensitive to low frequencies than high ones. B) insensitive to color and movement. C) sensitive to movement, but cannot see color. D) sensitive to both movement and color. E) none of the above
Two square air-filled parallel plates that are initially uncharged are separated by 1.2 mm, and each of them has an area of 190 mm2. How much charge must be transferred from one plate to the other
if 1.1 nJ of energy are to be stored in the plates? (?00 = 8.85 × 10-12 C2/N ? m2) A) 56 pC B) 39 pC C) 78 pC D) 3.5 µC
Besides the aerosol sprays, another source of chlorofluorocarbons is
A) fossil fuels. B) biomass fuels. C) Both of the above. D) refrigerants. E) jet exhaust.
If the energy of n = 6 is –0.378 eV and that of n = 4 is –0.850 eV in a hydrogen atom, a transition from n = 6 to n = 4 will emit a photon of what energy?