As a parallel-plate capacitor with circular plates 24 cm in diameter is being charged, the current density of the displacement current in the region between the plates is uniform and has a magnitude of 20 a/m2.

(a) calculate the magnitude b of the magnetic field at a distance r = 87 mm from the axis of symmetry of this region.

(b) calculate de/dt in this region.

Physics make-up packetname_cle14. an observer hears a sound with a frequency of 400 hz. if the speed of sound is 340 m/s,what is the wavelength of the sound? a. 0.85 mb. 1.2 mc. 2.75 m13.6 m15. as sound travels from steel into air, its speed decreases. if the frequency of the wavedoesn't change, what happens to its wavelength? a. it increases(b) it decreasesc. it remains the samed. there is not enough information given

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island