You are working in cooperation with the Public Health Department to design a device to measure particles from auto emissions. The average particle has a mass of 6.0 x 10 -9 kg. When the particles enter the device, they are exposed to ultraviolet radiation that knocks off electrons so that on average, each particle has a charge of 3.0 x 10 -8 C. The average particle enters the measurement apparatus with a speed of 900 m/s and is 15 cm from a very long, negatively charged wire with a linear charge density of -8.0 x 10 -6 C/m. The detector for the particles is located 7.0 cm from the wire. In order to design the proper kind of detector, you need to know the speed that an average emission particle hits the detector