The left-hand end of a long horizontal stretched cord oscillates transversely in SHM with frequency 210 Hz and amplitude 3.1 cm. The cord is under a tension of 190 N and has a linear density of 0.11 kg/m. At t=0, the end of the cord has an upward displacement of 2.1 cm and is falling. Consider the point x = 1.15 m on the cord. Determine the maximum velocity of this point. Determine its maximum acceleration. What is its velocity at t = 2.1s?

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.)

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.

Which model displays the change in a gas when the temperature of the gaseous system decreases?