A 1400 kg car has an engine that exerts 9800 N of force. If the force of friction between the car and the road is roughly 2801 N, what is the car's acceleration?

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.)

What is the equation for electrical work?

Need only answer if you think you know it