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1、1Analysis of high school physics experimental analysis of several data processing methodsPaper Keywords: high school physics experiment data processing method Abstract: Physical experimentally measured data, must be a scientific analysis and processing, in order to reveal most of the physical relati
2、onship between the high school physics experiment on the approach used to analyze data in order to help the teaching of physics experiments. Experiment is an important part of physics is an essential part of physics teaching, but students in the actual operation and processing. They often appear on
3、the error in the experimental data, the reason is that students do not firmly grasp the data processing method, without understanding, a smattering of knowledge, not to mention the analogy of, according to my teaching experiences, several treatment methods. (Several types of data presented below app
4、roach, for your reference) First, the average Average method is the treatment of measuring physical quantities many times the measurement, the measured value 2of the sum divided by the number of measurements, or the measured value of each formula with a fixed re-calculate the results were calculated
5、, then divided by the sum of the results measurement times, the final mean value of this method is called the average method. 1 average use of the principle: every measurement because of a number of factors will be different, the measured value is too large or too small, but its too large or too sma
6、ll tend to equal opportunities and degree, so the need for multiple measurements and then find the average, this measurement will be more realistic, scientific, there is persuasive. (2) data processing (1) If the request is the result of direct measurement of the results obtained, the average method
7、 should be used, such as, Determination of metal resistivity of the experiment, the measured wire diameter d, with the screw micrometer in the three-wire different points were measured, and then take three measurements, the average is the final diameter. 3(2) If the request can not be through direct
8、 measurement of the results obtained, will have to based on the principle of the experimental test several times to calculate the value of physical quantities, the end result should the value of multiple measurements of physical quantities derived by adding the average. acceleration of gravity with
9、a pendulum test is a typical experiment, seeking pendulum cycle steps are as follows: pull the pendulum in one direction at a slight angle, so that a smooth swing the ball, then measure the pendulum to complete n (20 -30) sub-total vibration time t, using the formula T = t / n calculated vibration b
10、all to complete a full cycle, this step was repeated three times, using the formula T = (T1 + T2 + T1) / 3 calculate the average value, that is, find the pendulums oscillation period. Second, the tracing method Tracing method is described by a number of points, strobe photography, and other records
11、with RBI RBI timer form, graphically show the results of experimental methods, such as, during the flat throwing motion of the object, this experiment, you can use the frequency flash photography mode records the trajectory of the ball, during 4the uniform speed linear motion experiment, with the RB
12、I record the movement of the timer in use tracing method, a high degree of attention to the following aspects: 1 in the outcome, you should carefully observe, analyze the results, remove the value of the error is too large and if the middle point of the individual appear very far from normal, there
13、may be causal factors leading to, should give up this point to repeat the experiment, Record the results of analysis, such as, in the uniform speed linear motion, the tape selected for the experiment, the first multi-hit a few tape, choose the clearest one RBI for research and analysis, analysis of
14、the relative density generally remove the front point, find a point in the back as the beginning point. (2) To record points based on scanning lines, solid lines should be smooth scan and record as much as possible so that more points by a smooth line or close to the smooth lines, and these records
15、point to a smooth line both sides of the uniform distribution , not in the process of scanning lines appear broken line. 53 To make the results more accurate description of the experimental points can not be recorded too, and described in the context of a reasonable, uniform distribution. Third, the
16、 image method Image method because of its visual image, easy-to-feature is widely used in physics experiments, also known as the mapping method, by definition refers to the graph paper to the correspondence between the experimental data together into Chart by Figure line drawn between the corresponding physical quantities, and thus further obtained experimental results with the experimental data of the image processing method as follows: 1 lists the measured
