Definitions Essays - Measurement, Epistemology, Knowledge

Definitions Essays - Measurement, Epistemology, Knowledge Definitions All experimental uncertainty is due to either random errors or systematic errors. Random errors are statistical fluctuations (in either direction) in the measured data due to the precision limitations of the measurement device. Random errors usually result from the experimenter's inability to take the same measurement in exactly the same way to get exactly the same number. Systematic errors, by contrast, are reproducible inaccuracies that are consistently in the same direction. Systematic errors are often due to a problem which persists throughout the entire experiment. Note that systematic and random errors refer to problems associated with making measurements. Mistakes made in the calculations or in reading the instrument are not considered in error analysis. It is assumed that the experimenters are careful and competent! [pic] How to minimize experimental error: some examples |Type of Error |Example |How to minimize it | |Random errors |You measure the mass of a ring three times|Take more data. Random errors can be | | |using the same balance and get slightly |evaluated through statistical analysis and| | |different values: 17.46 g, 17.42 g, 17.44 |can be reduced by averaging over a large | | |g |number of observations. | |Systematic errors |The cloth tape measure that you use to |Systematic errors are difficult to detect | | |measure the length of an object had been |and cannot be analyzed statistically, | | |stretched out from years of use. (As a |because all of the data is off in the same| | |result, all of your length measurements |direction (either to high or too low). | | |were too small.) |Spotting and correcting for systematic | | |The electronic scale you use reads 0.05 g |error takes a lot of care. | | |too high for all your mass measurements |How would you compensate for the incorrect| | |(because it is improperly tared throughout|results of using the stretched out tape | | |your experiment). |measure? | | | |How would you correct the measurements | | | |from improperly tared scale? |

dead stars essays

dead stars essays The story is focused in the life of Alfredo Salazar, who is the son of Don Julian and the brother of Carmen, who is a lawyer and engaged to Esparanza to whom he is deeply in love with until he met Julia Salas who made him confused about his love for his fianc. Alfredo met Julia in Judge Del Valles house, a friend of his father, who is his sister-in-law. He was puzzled with her smile every time he addresses her and he was charmed with her speaking voice. The daily routine of Alfredo and his father every Sunday morning after the mass is to go to the judges house that made Alfredo and Julia closer and know each better. He forgot that for several Sundays, he had not waited for Esperanza to come out of the church and he was already beginning to lie about his neighboring stuff. This is the beginning of his attraction to Julia. Esperanza did not enter in the picture because she was not prone to unprovoked jealousies that made Alfredo entertain the feeling towards Julia. When Don Julian invited the judge to Tanda, where he has a coconut plantation, a house, and a beach, they had this goodbye conversation because Julias parents want her to spend Holy week with them. The line The end of the impossible dream! meaning they have to be apart soon, pro ves that Alfredo is really in love with her. The time when Alfredo felt a violent commotion in his heart that he did not feel for Esperanza when he saw her is already a big problem because he will be soon married. He was already lying with his feelings but he still keeps his word to Esperanza. At the end of chapter two, the conversation is cut when Esperanza went out weeping with what his fianc had said. This situation made Alfredo think of what must be done. In chapter three, the paragraph started about Alfredo going to Santa Cruz, where he would defend a case and how it would disturb him because Julias lake town is ...