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PEDS203 Lecture : Chapter 9 - Structuring The Learning Experience continued

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taupewalrus464
22 Dec 2011
School
University of Alberta
Department
Physical Education and Sport
Course
PEDS203
Professor
Adrian Popescu

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Document Summary

Chapter 9: structuring the learning experience november 24 continued. Blocked practice y several skills y different gmp s y meaningful memories, forgetting reconstruction. Constant practice y variations of the same skill y same gmps (different parameters) y schema development adaptability. Greater leaning gains from varied practice presented randomly y several variations at random (lee) Greater learning from random order variation of one class of movements interspersed with practicing a second class of movements y throwing and catching (lee) Stimulus response mapping** know chap 3 and 4 for final. Consistent mapping performance condition for which a given stimulus pattern always requires the same response. Varied mapping given stimulus requires different responses at different times or different situations y.

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<p>A student wants to check the resistance of a resistor by measuring the voltage across it (V) and the resulting current through it (I) and then calculating the resistance R=V/I. He measures four different values of V and the corresponding currents I, as follows:<br /><br />Voltage, V (volts): 11.2 13.4 15.1 17.7<br />Current, I (amps): 4.67 5.46 6.28 7.22<br /><br />A) Calculate the four corresponding values of R (which will come out in ohms). What is his best estimate for R, and what is the random component of its uncertainty (deltaRrandom)?<br /><br />B)The resistor is rated at 2.50 ohms, which does not lie within the range Rbest + or - deltaRrandom, so he considers the possibility that the voltmeter and ammeter suffer some systematic error. The lab technician states that many of the meters in the lab have up to a 2 percent systematic error. Use error propagation to find the possible systematic error in R, and then combine the systematic and random errors to give the total uncertainty. (In both calculations, combine errors in quadrature.) What is his final answer and how does it compare with the given value?</p>

A student wants to check the resistance of a resistor by measuring the voltage across it (V) and the resulting current through it (I) and then calculating the resistance R=V/I. He measures four different values of V and the corresponding currents I, as follows:

Voltage, V (volts): 11.2 13.4 15.1 17.7
Current, I (amps): 4.67 5.46 6.28 7.22

(a) Calculate the four corresponding values of R (which will come out in ohms). What is his best estimate for R, and what is the random component of its uncertainty (delta_Rrandom)?

(b)The resistor is rated at 2.50 ohms, which does not lie within the range R_best + or - deltaR_random, so he considers the possibility that the voltmeter and ammeter suffer some systematic error. The lab technician states that many of the meters in the lab have up to a 2 percent systematic error. Use error propagation to find the possible systematic error in R, and then combine the systematic and random errors to give the total uncertainty. (In both calculations, combine errors in quadrature.) What is his final answer and how does it compare with the given value?