15. Describe how the speed of sound would change as it first travels through a
Solid:
Liquid:
Gas:
(2pts)

What do you think car designers do if the damage caused by a crash test is too severe?

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.)

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.