A lens that is thicker at the center than at the edge is called a(n) ______________ lens
Fill in the blank(s) with correct word
convex, or converging
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When a living cell doubles in diameter, it has eight times the mass to be nourished, and the amount of membrane through which it feeds is
A) only twice as much. B) only four times as much. C) also eight times as much. D) more than eight times as much.
What distance method is used to determine the distance to the most distant galaxies when only a redshift is measured?
a. Hubble's law b. supernova observations c. period-luminosity relationship of variable stars d. parallax
Magnetic confinement is used in controlled fusion experiments to
a. provide neutrons b. accelerate nuclei c. control a plasma d. excite nuclei into higher energy levels e. inject energy into nuclei
Fourier analysis is used
A) in breaking down sound signals to component parts. B) automatically in human hearing. C) both of these D) none of the above