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 90° 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?

Aparticle moves according to a law of motion s = f(t), 0 ≤ t ≤ 12, where t is measured in seconds and s in feet. f(t) = cos(πt/6) (a) find the velocity at time t (in ft/s).

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.