A disk of radius produces a potential =84.4 mV at the center of the disk at point P, as shown. Assume that charge density varies linearly with the radius according to =, where =7.55×10−10 C/m3. Calculate the radius of the disk in centimeters.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Select the three ways that the parallel-plate capacitor differs from a car battery.

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.