Calculate the focal length of the combination
Two thin lenses of focal lengths f1 = 8.8 cm and f2 = -5 cm, are placed in contact. Calculate the focal length of the combination of these two lenses.
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A beam of light consisting of wavelengths from 460 nm to 640 nm is directed perpendicularly onto a diffraction grating with 160 lines/mm.
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A 215 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.810, and the
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Historical figure- Elizabeth Gurley Flynn, Which historical figure from the reading did you select to interview?
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