Kepler’s 1st law states that
a. planets move in a circular path
b. planets move in elliptical paths
c. planets move at a constant speed
d. a planet’s orbital radius is related to its period

This is the substance(s) formed in a chemical reaction.

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.)

In a star, nuclear fusion occurs in the a. photosphere. b. corona. c. radiative zone. d. core.