A particle P is moving in a horizontal circle about O. It moves at constant speed V. Р
Which statement is true?
A
B
A force of constant size is acting in the direction of V.
A force of constant size is acting towards O.
The force on P varies in size as it moves around the circle.
С
D
There are no forces acting on P.

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.)