unit 1 lab- science Essay

642 WordsNov 1, 20143 Pages
Using Gravitational Force as a Measurement Tool Answer the following questions about the results of this activity. Record your answers in the boxes. Send your completed lab report to your instructor. Dont forget to save your lab report to your computer Activity 1 Record your data from Activity 1 in the boxes below. Enter the data for the sample you used in each trial (5000 rpm, 10000 rpm, etc) in the appropriate columns and the corresponding g-force, number of layers, and position of layers position results. You will need to use the following formula to assist with your laboratory report G-force 0 00001118 x radius of centrifuge arm x (rpm)2 The radius of the centrifuge arm for this instrument is 10 cm. Speed 5000 rpm 10000 rpm 15000 rpm…show more content…
Based on the data from Activities 1 and 2, which is likely the best speed and cesium chloride concentration combination to distinguish different types of soils Why Lab Report The g-force grows exponentially as rpms increase 15000 rpm because it allows for the most separation throughout the sample At 5000 rpm the organic matter, clay, and silt would be at the top while sand and gravel would further down At 15000 rpm each substance would be separated from each other in the order of (top to bottom) organic matter, clay, silt, sand, and finally gravel at the bottom The cesium chloride made the fluid thicker to increase drag 2.5 grams/liter because it formed the most separate layers to work with .5g/L - Organic matter on top the rest on the bottom 2.5g/L organic matter the first 2 layers then clay, silt, sand, and gravel respectively. With a higher cesium chloride levels comes higher drag. With higher drag the materials dont get to spread out as much which causes thinner layers 2.5g/L cesium chloride at 15000 rpm shows the greatest separation of all materials and as such allows for the best distinction between soils. Y, dXiJ(x( I_TS 1EZBmU/xYy5g/GMGeD3Vqq8K)fw9 xrxwrTZaGy8IjbRcXI u3KGnD1NIBs
Open Document