Physics, 28.06.2019 18:40 eyebang

Do wave fronts change speed as they are approaching or moving away from an observer?

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Physics, 22.06.2019 00:30, Hellopeople233

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Physics, 22.06.2019 05:00, markyyy53

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Physics, 22.06.2019 05:30, namekianball4

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Physics, 22.06.2019 11:50, azertyqwerty123

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?