We used 54,054.93 Watts in the three days sharpening pencils.
We took 172.7 seconds to sharpen pencils in three days using manual sharpeners.
We took 585.2 seconds to sharpen pencils in three days using electric sharpeners.
Here is our chart that tells you statistics about your pencil sharpener use.
Day

Number of watts used in the total day

Number of seconds spent using an electric sharpener

Number of seconds spent using a manual sharpener

Number of twists used for a manual sharpener

Tuesday

15,647.48

169.4

103.62

108

Wednesday

7,823.74

84.7

34.54

36

Thursday

30,583.71

331.1

34.54

36

Here is a chart to keep track of how many times you sharpen your pencil. Keep track of the times you use a manual sharpener and an electric sharpener.

Tuesday 2/8

Wednesday 2/9

Thursday 2/10


Manual

Electric

Manual

Electric

Manual

Electric

Holley

0

6

0

0

0

3

Nayantara

0

0

0

0

0

24

Adrian

0

0

0

0

0

0

Aly

0

1

0

0

0

1

Bryan

0

0

0

0

0

0

Bobby

0

0

0

0

0

1

Casey

0

0

0

1

0

2

Donnie

0

0

0

0

0

2

Eleanor

0

2

0

1

0

0

Eli

0

0

0

2

0

3

Eliza

0

0

0

0

0

0

Emily

0

0

0

0

0

0

Eric

0

1

0

2

0

2

Francesca

0

0

0

0

0

0

Hazel

2

0

0

1

0

2

Jenna

1

2

0

1

0

0

Kerem

0

0

0

0

0

1

Mick

3

4

0

0

1

2

Nina

0

3

0

1

0

0

Nola

0

0

0

0

0

0

Patrick

0

2

1

1

0

0

Rebecca

0

0

0

1

0

0

Sabine

0

1

1

0

0

2

Day

Manual

Electric

Tuesday

6

22

Wednesday

2

11

Thursday

1

43

The average amount of watts used in _______ seconds is 93.875 watts
WATTS AND TIME TO GET SHARP (ELECTRIC):
Type Of Sharpener

Number Of Seconds

Number Of Watts

Boston Power House

9.48

85.6

XActo School Pro

9.80

93

XActo

3.81

98.5

Our Method and Materials:
Adrian Hogue Method and Materials Due: 2.8.10
Science Expo 407
Materials
v Four electric pencils sharpeners
v Two packets of Dickson Ticonderoga pencils
v Five manual pencil sharpeners
v One timer
v One KillAWatt measurer
v Ruler
v Tape
Special thanks to every one that brought in manual pencil sharpeners!!!! J
Method
 Our method for testing electric pencil sharpeners was to have one person look at the timer, one person look at how many watts it took, and one person sharpening the pencil. We sharpened each pencil for approximately 3.80 seconds. The person sharpening the pencil had to be the same every time or it would add a new variable.
 When we were testing manual pencil sharpeners we used the same three person method. One person would sharpen the pencil, one person would record the data, and another person would measure the pencil from the end of the painted wood, to the tip opposite the eraser.
 In order to get accurate data for the manual pencil sharpeners we controlled the number of times we turned the pencil and made it three. Here is an example of what it was like: The person sharpening the pencil would turn it three times, and then the person measuring would record the distance from the end of the painted wood, to the tip opposite the eraser. After that the person recording the data would write it down in a table.
Background Information:
Adrian Hogue Background Information Due: 2.8.11
Science 407
In our project we are researching about pencils and pencil sharpeners. There are two different kinds of pencil sharpeners, manual and electric. When we are researching electric pencil sharpeners we are testing the sharpness of a Dickson Ticonderoga pencil after having been sharpened of 3.80 seconds. We are also testing how many watts it takes to sharpen it for 3.80 seconds. Our perdition for these experiments is that they pencil sharpener in 407 will be the worst. We predict that the better the sharpener the more watts it will use. When we are testing manual pencil sharpeners we are testing how many twists it takes to sharpen a pencil. Then we will find the average amount of turns it takes and time it. We will compare how sharp new pencils get after 3.81 seconds in different sharpeners. We will put a new pencil in each sharpener. For 3.81 seconds and measure how sharp it is. We will also measure how many Watts each sharpener uses. We will also test manual sharpeners.
We started some testing today, this is our table.
FINAL CHART FOR ELECTRIC SHARPENERS
Type of Sharpener

Watts used in 3.81 seconds

Sharpness At Dullest Point

XACTO # 8470929

98.4 WATTS

VERY SHARP .4 CM

XACTO SCHOOL PRO #2378548

89 WATTS

DULL .001 CM

XACTO #3082576

98.5 WATTS

PRETTY SHARP .2 CM

BOSTON POWERHOUSE

90 WATTS

QUITE SHARP .3 CM

How many twists it takes to get a decent point with manual sharpeners.
the first row signifies the type of sharpeners used. The columns show the length of the the tip and the last column shows how many twists it took to get there. Once there was a decent tip, we recorded the total length of the tip and the length of the lead.
Staples

Baumgarten

Black #12

Purple Heart Double Sharpener

Tall Pink

Amount of Twists going up by three

0.3 CM

0.4 CM

0.7 CM

0.5 CM

0.3 CM

3

0.7 CM

0.8 CM

1. CM

0.9 CM

0.5 CM

6

1. CM

1.1 CM

1.4 CM

1. CM

0.7 CM

9

1.2 CM

1.3

1.6 CM

1.3 CM

0.8 CM

12

1.5 CM

1.5

1.9 CM

The tip of the pencil lead is 0.4 and the total length 1.7

0.9 CM

15

The tip of the pencil lead is 0.3 CM and the total length is 1.6 CM

The tip of the pencil lead is 0.3 CM and the total length 1.6 CM

The tip of the pencil lead is 0.3 CM and the total length is 2. CM


1.2 CM

18





1.3 CM

21





The tip of the pencil lead is 0.2 CM and the total length 1.8 CM

24

The mean of our data was 18 twists so we timed how long it took to do 18 twists. It took 17.27 seconds.
THE EXPO POSTER
PURPOSE:
PURPOSE
The purpose of our science experiment was to find out all we could about pencils and pencil sharpeners. Then we found out which electric sharpener sharpened in the least amount of time and used the least amount of energy. The upper school has continually been having trouble with breaking pencil sharpeners and we wanted to try and help fix that. We looked at which sharpeners used less energy and were the most efficient Also to encourage manual pencil sharpener usage we found out which manual sharpener sharpened fastest and worked best by making a sharpener point.
What was the question asked?
Why was that question asked?
Group Members: Adrian, Eliza & Rebecca
Journal Entries  Date and Writer
1. What did your group accomplish today?
2. What does your group hope to accomplish in the next class period?
3. Is there anything you need from Holley to move forward in your project?

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