Suppose you drop your pencil on the floor while working at a desk on your problem set. roughly estimate the change in entropy of the universe well after the pencil comes to rest. note: an approximate, order-of-magnitude numerical estimate is what we are looking for here. but briefly specify and justify any major approximations or assumptions you make.

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. what scientific practice is this? collecting data asking a question providing explanations communicating results

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.)

Which is the most accurate name for the ionic compound cas?