_Lab 5 Document

List procedures, draw diagrams, and create a data table and collect data for multiple trials and then compare your average value with the actual mass. You will also need to determine if your calculations are within a 95% accuracy. Procedure #2 1) Create a Data table to record your data ( include x m, m c, x c , x f r m, r c, m m ) 2) Place your meter stick on the table on its x m. 3) Choose a lab weight to be your m c. ( Tip: choose a smaller weight unlike me ) 4) Weigh your lab weight ,if it is not listed on the weight, using the scale and record the mass as m c . 5) Set your weight at a certain point on the meter stick this will be your x c 6) Drag the meter stick slowly until you reach the tipping point. 7) Record that point as your x f. 8) Repeat steps 5- 7 for the next four trials. Data Table Trial x m m c x c x f r m r c m m 1 50.0cm 500g 40cm 42.0cm 8.0 2.0 125.0g 2 50.0cm 500g 35cm 38.7cm 11.3 3.7 163.7g 3 50.0cm 500g 30cm 33.3cm 16.7 3.3 98.8g 4 50.0cm 500g 25cm 29.5cm 20.5 4.5 109.8g 5 50.0cm 500g 20cm 28.4cm 21.5 8.5 197.7g Calculation r m = |x f - x m | |42.0 - 50.0 | = 8.0 , |38.7 - 50.0 | = 11.3, |33.3 - 50.0 | = 16.7, |29.5 - 50.0 | = 20.2, |28.4 - 50.0 | = 21.5 r c = |x f - x c | |42.0 - 40.0 | = 2.0, |38.7 - 35.0 | = 3.7 , |33.3 - 30.0 | = 3.3, |29.5 - 25.0 | = 4.5, |28.4 - 20.0 | = 8.5 m m = (m c x r c ) / r m (500 x 2.0) / 8.0 = 125.0,(500 x 3.7) / 11.3 = 163.7,(500 x 3.3) / 16.7 = 98.8,(500 x 4.5) / 20.5 = 109.8, (500 x 8.5) / 21.5 = 197.7 The average m m is 139.0.