Acompact disc (cd) stores music in a coded pattern of tiny pits 10−7m deep. the pits are arranged in a track that spirals outward toward the rim of the disc; the inner and outer radii of this spiral are 25.0 mm and 58.0 mm, respectively. as the disc spins inside a cd player, the track is scanned at a constant linear speed of 1.25 m/s. (a) what is the angular speed of the cd when the innermost part of the track is scanned? the outermost part of the track? (b) the maximum playing time of a cd is 74.0 min. what would be the length of the track on such a maximum-duration cd if it were stretched out in a straight line? (c) what is the average angular acceleration of a maximum- duration cd during its 74.0-min playing time? take the direction of rotation of the disc to be positive.

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

5submission this assignment is worth 20 points total. you are required to submit the following by next lab: 1. (3 points) determine the equation for the output angular velocity ω2 = θ˙ 2 as a function of θ1, ω1 = θ˙ 1 and α. you must show all your work to receive credit. 2. (2 points) use the result of problem#1 to plot ω2 over 0 ≤ θ1 ≤ 360deg with ω1 = 360deg/sec. do this for α = {10,30}deg. show the results on the same plot and properly label the axes, title, legend. for this you can use matlab or ms excel. 3. (3 points) determine the equation for the output angular acceleration ω˙ 2 and create a plot similar to the one in problem#2. 4. (10 points) submit plots of the results (ω2 and ω˙ 2) obtained from creo/mechanism and compare them to results of problem#2 and problem#3. note that you should do these comparisons for the two cases with α = {10,30}deg. 5. (2 points) provide a brief explanation of the results. did they match? what are the implications as misalignment angle increases?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value