When an oscillator is driven in resonance,
a. there are no standing waves.
b. any driving frequency may be used.
c. all natural frequencies are present.
d. there is maximum energy transfer.
d
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A converging lens with two convex surfaces has a front surface with radius of curvature of 13.1 cm; the back surface has radius of curvature of 16.5 cm, and it is made from material with an index of refraction of 2.10 . What is the focal length of the lens?
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