What is the velocity of the particle when its acceleration is zero?

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

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.)