A60-gallon water heater is initially filled with water at 70°f. determine how much energy, in btu, needs to be transferred to the water to raise its temperature to 100°f. given: the water properties at an average water temperature of 85ºfrho = 62.17 lbm/ft3 and cp = 0.999 btu/lbm-r.

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.)

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

How to calculate voltage drop in a series circuit