CHEM1010 How do you measure up?

User Generated

PureelUava

Science

Description

Please read all the instructions carefully. I need all the answers from exp2.zip, E 2 Table Template empty.pdf, and E 2 Table Template modified.docx.

Explain how you get answers in tables step by step, please

Measurements from me:

Height: 13.80cm; 13.70cm; 13.80cm

Width: 7.50cm; 7.60cm; 7.60cm

Depth: 4.20cm; 4.30cm; 4.30cm


Measurements from friend 1:

Height: 13.70cm; 13.80cm; 13.80cm

Width: 7.60cm; 7.60cm; 7.60cm

Depth: 4.10cm; 4.00cm; 4.10cm


Measurements from friend 2:

Height: 13.80cm; 13.70cm; 13.70cm

Width: 7.60cm; 7.60cm; 7.60cm

Depth: 4.20cm; 4.10cm; 4.10cm




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Explanation & Answer

See attached

STEPS TO TABLE FILLING
Step 1: Find averages of all 9 measurements
Average for all 9 height measurements
13.80

13.70

13.80

13.70

13.80

13.80

13.80

13.70

13.70

7.60

7.60

7.60

7.60

7.60

4.00

4.10

4.20

4.10

4.10

Average = 13.76
Average for all 9 width measurements
7.50

7.60

7.60

7.60

Average = 7.59
Average for all 9 depth measurements
4.20

4.30

4.30

4.10

Average = 4.16
Step2: Use the averages to find the deviations for each measurement
Height deviation = |Average height of all 9 measurement – individual height measurements|
Example:
For a measurement of 13.80
Height deviation = |13.76 -13.80| = 0.04

Width deviation = |Average width of all 9 measurement – individual width measurements|
Example:
For a measurement of 7.5
Height deviation = |7.59- 7.50| = 0.09

Depth deviation = |Average depth of all 9 measurement – individual depth measurements|

Step3: Calculate overall average deviations for the measurement
Average deviation = sum of deviations/ sum of observations
Step4: Calculate area and circumference of the box

Area = 2*(13.76*7.59 + 13.76*4.16 + 7.59*4.16) = 386.17
Circumference = Length*width *depth = 13.76*7.59*4.16 = 433.80

Step5: Calculate max deviation

Max height deviation = 0.06
% Max height deviation = 0.06/13.76 *100% = 0.44%

Max width deviation = 0.09
% Max width deviation = 0.09/7.59 *100% = 1.19%

Max depth deviation = 0.16
% Max depth deviation = 0.16/4.16 *100% = 3.85%


Name(s):

Report Sheet: How Do You Measure Up?
Measurements for
Author:
Measurement

1
2

3
Author
Average

Height
13.80
13.70
13.80
13.77

Height

Width

Deviation

-0.04
0.06
-0.04
-0.01

7.50
7.60
7.60
7.57

Width

Deviation
0.09
-0.01
-0.01
0.02

Depth
4.20
4.30
4.30
4.27

Depth
Deviation
-0.04
-0.14
-0.14
-0.11

Measurements for Group
Member #2:
Measurement

Height

1

13.70
2
13.80
13.80
3
Measurements for Group
Member #3:
Measurement
1

Height

3
Measurement

Height

Group
13.76
Averages
Circumference
Area

386.17cm2

Volume

433.80 cm3

Width

Deviation

0.06
-0.04
-0.04

7.60
7.60
7.60

Height

7.60
7.60
7.60

Height
Deviation
0.00

Width
7.59

Max H Deviation

0.06 cms

0.41%

Max D Deviation

0.16 cms

3.74 %

Width
Deviation

-0.01
-0.01
-0.01

Width

Deviation

-0.04
0.06
0.06

13.80
13.70
13.70

2

Height

Width

Deviation
-0.01
-0.01
-0.01
Width

Deviation
0.00

Max W Deviation

Depth
4.10
4.00
4.10

Depth
4.20
4.10
4.10

Depth
4.16

Depth
Deviation
0.06
0.16
0.06

Depth
Deviation
-0.04
0.06
0.06
Depth
Deviation
0.00

0.09cms

1.19 %

See attached. Use this:

Experiment 2: How Do You Measure Up?
Scientists often collect quantitative data (measurements). Measurements of real
systems involve three components - the object being measured, the measuring device
(instrument), and the person (or machine) making the measurement. The goals of this
activity include:
1.
2.
3.
4.
5.

Practice in measuring length.
Sharing your data with other members of your group.
Investigating ways to report the precision of a collection of measured values.
Investigating ways to report the accuracy of a measured value.
Comparing the precision and accuracy of your measured values with those of
other members of your group.
6.
Examining the sources of error in collecting data.
7.
Exploring the relationship between your measured
values and significant figures.

Scientists prefer data that is reproducible, that is, data
that agrees with measurements made by others or with
measurements made at different times. This experiment will
give you the chance to examine how reproducible the size of a
box of Jiffy Corn...


Anonymous
Awesome! Made my life easier.

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