Abat locates insects by emitting ultrasonic "chirps" and then listening for echoes from the bugs. suppose a bat chirp has a frequency of 25 khz. part a how fast would the bat have to fly for you to just barely be able to hear the chirp at 20 khz?

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)