How does the mass of an object that is moving at constant sped affect the amount of force needed to stop that object form moving?

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.)

Area around a charged object where the objects can exert a force on another charged objects is an electric

What is the specific heat of wood ?