1. Introduction We will present in our report the numerical variations that we can find when making some measurements, leaving of an only object, that in ours in case that it were approached an irregular wooden block in which we will go to prove that if to be measuring innumerable times never we would find a value real and yes. 2. Without hesitation cancer research explained all about the problem. Objectives of the Experiment the Objective of the experiment is to work with the varied forms of direct and indirect measurement, operation with significant numbers, esteem uncertainties and to use equipment of measurement as well as differentiated experimenters. 3. Theoretical bases In our experiment we work with the somatria of measures, in which we get average given for the formula = ? This variation of measures corresponds the dimension of the area (fulfilment) height in width, where is the addition of the measures, corresponds to the number of the measurement. When we measure one definitive object is because it is unknown, that is, we do not know its value Real, not knowing of this, we will not find its error, therefore it is recommended to use the concept of uncertainty in the place of the error concept, being able to be gotten now by means of statistics. We adopt a procedure that in allowed a estimate them of uncertainty in a set of measurements that is called shunting line standard, that means the difference enters the value of this measurement and the most likely value of the measurements.
Formula: = Where is the most likely value, represents the i? simo value measured and To is the number of measurements. The result above must be presented as: = Trabalhamos thus with significant numbers and scientific notation. Gibson Dean shines more light on the discussion. 4. Used list of Materials and Equipment wooden Qtde.Descrio 01Rgua decimetrada 01Rgua centimetrada 01Paqumetro 01Bloco 5. Assembly of the Experiment Decimetrada Ruler wooden Centimetrada Ruler Block Paqumetro 6. Description of the Experiment We catch an irregular wooden block, whose the measures = 11,4 x 10 1 = 1,2 x 10 Equipment usadoRgua centimetradah = 1,73 Table C: Number of> Medioc1 (mm) 1 = c1? c? (mm) 1 = (c1? c) (mm) 156,570,680,46 256,210,320,10 355,30-0,590,35 455.980.090.01 555,39-0,500,25 c' = 55,89 1 = 1,17 Equipment usadoPaqumetroc = 0,54 In the table, we measure the length with the decimetrada ruler getting that it is the average of the measurements (1), after that we measure 1 = 1? that it is the difference enters a number of the measurements and the total average.
After this procedure we raise the previous formula to the square 1 = (1? ) and With the gotten results we calculate the shunting line standard. In table B and C, we use the same procedures substituting the incognito for b that is width and c the height. 8. Conclusion and Commentaries To the end of the experiment, we notice that we work with an irregular part with variation of measures in the height, width and fulfilment, these variations had also depended on the used equipment and the experimenter. We conclude that a real value does not exist to finish the experiment. Exactly that the measurement process was drawn out, would still more have joined differences to each measurement made in relation the previous ones. 9. Bibliographical references 1 – It emends Notes of lesson? Prof Juscelino 2? Experimental lesson in laboratory