Alocal 1 mhz am radio station from davis wants to broadcast 24 hours a day of the hit show "cow talk" to cities west of davis (vacaville, dixon, suisun, however, they do not want to waste power broadcasting to sacramento because people there aren't into cows. assume that the radio station is using two 3 m tall towers. but reflections from the ground cause the towers to appear 6 m tall electrically. also assume that the current is uniform along each tower length. (a) show that the two towers should be separated by 75 m and be driven 90ยฐ out of phase to produce a pattern (called a cardioid) with a single null to the east. (b) should the eastem dipole lead or lag?
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Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ฮต. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ฯ, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
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Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above
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What are the dimensions of the cross section that passes through the points a, f, g, and d?
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Alocal 1 mhz am radio station from davis wants to broadcast 24 hours a day of the hit show "cow talk...
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