11. A coil of inductance 88 aliu UUR 12. The current amplitude / versus driving angular frequency o for a driven LCR circuit is given in Figure 7.45, where the vertical frequency 930 Hz. If the phase constant between the applied voltage and reader to do with the resistance of the con scale is set byl. = 4.00 A. The inductance is 200 uH, and the emf amplitude is 8.0 V. What are (a) C and (b) R? I (A) 0 10 50 30 0 (1000 rad/s)

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s. part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.