PHYSICS LAB REPORT FORMAT TITLE PAGE The first and front page includes: 1. The name and number of experiment 2. Your name, lab partner name 3. Date ABSTRACT [10 points] It is a concise, one-paragraph (100-200 words) summary of the purpose, methods, and significant results of the experiment. It is a "lab report in miniature" and appears at the top of the first page. The abstract contains three things: What you did: what you measured. How you did it: the experimental procedures used. Results: the final numerical results including units and errors. Note: Write the abstract only after the rest of the report is written! INTRODUCTION [10 points] In your own words, give a brief description of the main idea behind the experiment. RAW DATA AND GRAPHS [30 points] 'Raw" data means the data taken in the lab, not something you calculated later. The raw data is critical because it allows the curious reader to calculate the results independently. Raw data includes all tables, graphs, and figures as required. Tables must have titles, columns must be labeled and have units. Graphs must have titles, axes need to be labeled and have units. You may share your raw data and graphs with your lab partners. All other parts of the lab must be your own. DATA ANALYSIS/QUESTIONS [30 points] In this part, you calculate the data taken in the lab. If many similar calculations are involved, just include one sample calculation in detail. But you need to include all the final results. Questions - answer all questions that were listed throughout the lab. CONCLUSION [20 points] State a summary of your results. Was the result what you expected? Why or why not? Include sources of error, such as "incorrectly counting trials leading to...". Make suggestions for improving the procedure, if any.original best-fit line and use your ruler to make two new lines that better represent the data. You may want to put circles around the data you believe represent the less dense material and squares around the data that represents the more dense material. 5. Find the slope of each of the two lines you have created. Remember the slopes are the densities of the two different materials. Slope of the steeper line: Slope of the other line: TABLE 2.5 Length, cm Diameter, cm Volume, cm3 112, 66mom |49 omar Mass, g Density, g/cm3 31. 98 91 26 02 107. 32 18 a 8 8 V . 90 211 .72 14. 91 416 . 03 14 .92 101 197 10 . 68 60 . 97 28 . 80 15 . 89 2. 13 4. 90 71. 33 22. 40 20 . 21 56. 01 14 .92 12 . 96 81 .27 14. 94 23.03 76 . 30 8 6. 40 20 . 19 30 . 4 is . ga Density V = AP 1 = mm r- Radius, r = 35 r = aman A = TT ( 2 mom)Experiment 2: Measurement Instruments (Mass, Volume, and Density) 2.0 Equipment Needed Laboratory balance Vernier caliper Cylindrical metal rod Micrometer caliper (metric) Sphere Meterstick Short piece of solid copper wire Graduated cylinder Rectangular piece of paper sheet Mystery density set 2.1 Introduction and Objectives Common laboratory measurements involve the determination of the fundamental properties of mass and length. Most people are familiar with the use of scales and rulers or metersticks. However, for more accurate and precise measurements, laboratory balances and vernier calipers or micrometer calipers are often used, particularly in measurements involving small objects. In this initial experiment on measurement, you will learn how to use these instruments and what advantages they offer. Density, the ratio of mass to volume, will also be considered, and the densities of several materials will be determined experimentally. After performing this experiment and analyzing the data, you should be able to do the following: Use the vernier caliper and read the vernier scale. W N - Use the micrometer caliper and read its scale. Distinguish between mass and density, and know how to determine experimentally the density of an object or substance. 2.2 Theory A. Laboratory Balance Some common types of laboratory balances are shown in Fig. 2.1. Mechanical balances or "scales" are used to balance the weight of an unknown mass m against that of a known mass mi (i.e., mg = mig or m = mi) and the mass of the unknown is read directly in mass units, usually grams. The weight w of an object is its mass m times a constant g, the acceleration due to gravity; g=9.80 m/s2 = 980 cm/ s2 (i.e., w = mg or m = w/g). Some scales, such as bathroom scales, are 23