This question is typical on some driver license exams: a car moving at 43 km/h skids 17 m with locked brakes. how far will the car skid with locked brakes at 129 km/h? assume that energy loss is due only to sliding friction.
answer in units of m.

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 built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%