Asmall pickup truck that has a camper shell slowly coasts toward a red light with negligible friction. two dogs in the back of the truck are moving and making various inelastic collisions with each other and the walls. what is the effect of the dogs on the motion of the center of mass of the system (truck plus entire load)? what is their effect on the motion of the truck?

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.)