uncertainty gives the reader an idea of the precision and accuracy of your measurements. Use the following method for finding the uncertainty associated with any measuring device used in lab. First‚ find the least count‚ or the smallest printed increment‚ of the measuring device. On the meter sticks‚ the least count is 1 mm. On the double pan balances‚ the least count is 0.1 g. On the small graduated cylinders‚ the least count is 25 ml. If you are using the full precision of the instrument‚ you are probably
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and Spectrophotometer Introduction In scientific experiments‚ correct measurements are required to achieve precise and accurate data. Precision is the degree to which several measurements provide answers very close to each other. Accuracy describes the nearness of a measurement to the standard or true value. Certain measuring devices are used to attain precision and accuracy. One example is the Air displacement pipette or the micropipettes. The micropipettes are measuring tools used to transfer
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Accuracy and Precision relate to quality of measurement. Accuracy refers to how close the measurements are to the “true” value or accepted standard value or known value. Precision is how close measurements are to each other. Precision is a unit of measurement that is also referred to as the ability to reproduce the same results multiple times. Society is reliant on standard measurements when they buy goods and services. Society depends upon the accuracy and precision of measurements for
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would account for any discrepancies in the weight of different graduated cylinders. 4. a) In Part B‚ you are instructed to deliver “about 2 mL” of water from a buret “with a precision of 0.01 mL.” Which of the following quoted volumes is/are consistent with these instructions? 1.87 mL it follows instructions for precision‚ but not necessarily for accuracy 1.999 mL this does not use the number of significant digits we are supposed to use (3 sd would be 1.99 mL) 2.03 mL it
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stroke. I chose to deal with my father. In this case I think I used more of my Precision learning pattern‚ because I kept telling myself that I would have time to get my assignments done when I got home. But that was not the case‚ my body and brain was so exhausted that I could not even begin to tell you how I drove an hour to get home it was all a huge blur. I Cassie’s situation she was really trapped in the Precision learning pattern. She had a schedule to help her get her work done but when it
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Lesson Plan in Mathematics IV I.Objectives At the end of the lesson‚ the students should be able to: 1. Identify linear equation in two variables. 2. Solve and graph linear equation in two linear variables 3..Present solutions with accuracy and precision in ones work. II.Subject matt... Premium763 Words4 Pages Detailed Lesson Plan A DETAILED DEMOSTRATION LESSON PLAN IN SCIENCE AND HEALTH V I. OBJECTIVES At the end of the lesson‚ the pupils should be able to: a. Identify ways by which solar energy
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Experiment 2 CALIBRATION OF A PIPETTE Introduction An ordinary laboratory pipette may be expected to deliver its nominal volume with good precision and good accuracy if it is used in the way recommended. In this experiment we investigate the precision and accuracy of such a pipette by making accurate determinations of the mass of water it delivers in repeated operations. Materials 10.0-cm3 pipette‚ 50-cm3 beaker‚ thermometer‚ pipette filler‚ graph paper. Procedure
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Experiment 1 (week 2) The purpose of this experiment is to become familiar with the precision and accuracy of scientific glassware. I figured the smaller the glassware the more accurate the measurements would be. Which when we were preforming the experiment proved my theory. As the glassware got smaller the easier it was to get the accurate amount of water into the glassware. We went from a big flask to a small beaker to an even smaller pipette. We used a scale to get the appropriate weight
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to ’tare’ when taking the mass of your sample? Be specific. Answer: Tare is used to reset a balance to zero in order to get only the weight of a sample‚ not of a sample and container (Yee‚ n.d.‚ Weighing…). It is important because accuracy and precision are both very important when measuring. The tare feature makes the measurement more accurate. It also allows just the substance to be measured without the substance having to be put directly on the balance. (c) (2 pts) What is the difference between
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1. What is changing in the toothbrush category? Assess Colgate Palmolive’s competitive position. Toothbrush manufacturers have poured millions of dollars and hours‚ to marry form and function in oral health care products that enable their users to brush frequently‚ comfortably‚ and above all‚ properly. Along the way‚ they have built the U.S. oral care market into a $2.9 billion industry‚ changed the brushing habits of millions and turned the lowly toothbrush into a trendy lifestyle accessory. As
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