An artillery shell is launched on a flat, horizontal field at an angle of α = 31.7° with respect to the horizontal and with an initial speed of v0 = 202 m/s. what is the horizontal velocity of the shell after 18.96 s of flight? (neglect air friction. use the coordinate system where the x-axis is horizontal and points to the right; and the y-axis is vertical and points up.)

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.)

State the following: boyle's law and charle's law

Hunter’s velocity was 4.5 m/s. at the end of his race, his velocity was the same. which best describes his movement? his movement stopped. his acceleration is zero. his time was constant. his acceleration was positive.