An ambulance driving 50.0 m/s emits a sound wave with a wavelength of 80.0 centimeters. As it drives toward a hospital, which of the following is the only possible frequency heard by the medical staff who are standing at the entrance? Speed of sound is 343 m/s.

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.)

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

The velocity of a car traveling in a straight line increases from 0 meters/second to 30meters/second in 8 seconds. what is the average acceleration of the car?