A satellite was launched in order to observe the Saturn. At the moment the distance between the satellite, and the Saturn was
10 km with an attractive force 10,000 N. While after 20
seconds, the distance decreased to 5 km, what is the force
then (in N)?

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.)