Uncertainty Lab Notes

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6 Uncertainty Lab Notes
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40
v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v 1.37
v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v 1.37
v 1.35 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v 1.37
v 1.35 v 1.32 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v 1.37
v 1.35 v 1.32 v 1.39 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v 1.37
v 1.35 v 1.32 v 1.39 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v 1.32 v 1.39 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v The first one to have
significant variation 1.32 v 1.39 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v The first one to have
significant variation 1.32 v 1.39 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v The first one to have
significant variation 1.32 v 1.39 v No
uncertainty or variation!
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v The first one to have
significant variation 1.32 v 1.39 v
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v The first one to have
significant variation 1.32 v 1.39 v This
digit is either a 3 or a 4 after rounding
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v The first one to have
significant variation 1.32 v 1.39 v This
digit is either a 3 or a 4 To be the uncertain
digit it must be 3 or more different
digits
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40 v
Let us look for the uncertain digit 1.37
v 1.35 v The first one to have
significant variation 1.32 v 1.39 v This
digit is either a 0,7,5,2,9 after rounding This
is the uncertain digit You must always round to
the uncertain digit Average and round to the
uncertain digit
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40
v 1.37 v 1.35 v 1.32 v 1.39
v 1.366 average
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40
v 1.37 v 1.35 v 1.32 v 1.39
v 1.366 Round to the second
decimal average
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40
v 1.37 v 1.35 v 1.32 v 1.39 v 1.37
Find the number furthest away from the
average
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40
v 1.37 v 1.35 v 1.32 v - 1.37
-0.05 1.39 v 1.37
Determine the difference
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40
v 1.37 v 1.35 v 1.32 v 1.39
v 1.37 ? 0.05 v Make this the
uncertainty
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Exploring and Dealing with Uncertainty 1.
Measure the voltage of a single battery with
five different analog voltmeters. 1.40
v 1.37 v 1.35 v 1.32 v 1.37 ? 0.05
v 1.39 v average uncertainty
unit
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters.
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v no
uncertainty
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v no
uncertainty
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v
uncertainty starts here- uncertain digit
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v
uncertainty starts here- uncertain digit
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v
1.3714
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v
1.3714
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v
1.37
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Exploring and Dealing with Uncertainty 2.
Measure the voltage of a single battery with
five different digital voltmeters. 1.389
v 1.375 v 1.366 v 1.359 v 1.368 v 1.37 ?
0.02 v must be the same decimal place!
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Determine the average and uncertainty 3. 35.47
g 35.35 g 35.27 g 35.36 g 37.30 g
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Determine the average and uncertainty 3. 35.47
g 35.35 g 35.27 g 35.36 g 37.30 g reject- way
off
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Determine the average and uncertainty 3. 35.47
g 35.35 g 35.27 g 35.36 g 37.30 g reject- way
off 35.4 ? 0.1 g
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Determine the average and uncertainty 3. 35.47
g 35.35 g 35.27 g 35.36 g 37.30 g reject- way
off 35.4 ? 0.1 g average uncertainty unit
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Determine the average and uncertainty 4. 105.335
mm 105.334 mm 105.333 mm 105.334 mm 105.336 mm
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Determine the average and uncertainty 4. 105.335
mm 105.334 mm 105.333 mm 105.334 mm 105.336
mm uncertain digit
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Determine the average and uncertainty 4. 105.335
mm 105.334 mm 105.333 mm 105.334 mm 105.336
mm 105.334 ? 0.002 mm
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Determine the average and uncertainty 5. 1.263
cm 1.262 cm 1.261 cm 1.273 cm 1.262 cm
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Determine the average and uncertainty 5. 1.263
cm 1.262 cm 1.261 cm 1.273 cm 1.262
cm 1.262 ? 0.001 cm
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Determine the average and uncertainty 6. 1. 5 6
3 cm 1. 5 5 9 cm 1. 5 6 2 cm 1. 5 5 5
cm 1.561 cm
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Determine the average and uncertainty 6. 1. 5 6
3 cm 1. 5 5 9 cm 1. 5 6 2 cm 1. 5 5 5 cm 1. 5
6 1 cm
Average
Round to the third decimal place
Find the furthest away
Add uncertainty and a unit
1.560 0.005 cm
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Exploring and Dealing with Uncertainty Whats
Wrong? 1.37 ? 0.002 v not same decimal
place! 1.37 ? 0.002 not same
decimal place! 1.37 v ? 0.002 v 2
units Demonstration of a catalyst
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Reading A Burette
A Lesson
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