The output of an ac generator connected to an rlc series combination has a frequency of 12 khz and an amplitude of 28 v. if r = 4.0 ohms, l = 30 μh, and c = 800 nf, find a. the impedance b. the amplitude for current c. the phase difference between the current and the emf of the generator

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability