In a dentist's office an X-ray of a tooth is taken using X-rays that have a frequency of 7.96 x 1018 Hz. What is the wavelength in vacuum of these X-rays? Number Units v Hz m/s m Save for Later Attempts: 0 of 1 used Submit AnswerA tourist is walking at a speed of 1.5 m/s along a 5.3-km path that follows an old canal. If the speed of light in a vacuum were 2.8 m/s, how long (in km) would the path be, according to the tourist? Number HI Units C hr breaths/min Save for Later km Attempts: 0 of 1 used Submit Answer kg/sAt a distance r from a point charge, the magnitude of the electric field created by the charge is 274 N/C. At a distance r2 from the charge, the field has a magnitude of 131 N/C. Find the ratio r2/r1. Number HI Units V No units m m/s Save for Later m/s^2 Attempts: 0 of 1 used Submit Answer kg N