Determine the amount of potential energy of a 5.0 kg book that is moved to three different shelves on a bookcase. the height of each shelf is 1.0 m, 1.5 m, and 2.0m

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

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.)

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader