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Load at Deformation

How do these numbers compare to the mass of the beams themselves?

The two following graphs show the same information ordered two ways.
They show two important pieces of information.
1. There is more than one order of magnitude difference in the amount of mass the beams will support and the average mass of the beams.
2. There is not a correlation between the mass of the beam and the amount of mass the beam will support.

Class Results for Paper Beams

Amanda:
Weight of the beam: 26g
Bucket +sand: 309g
Ration - 1:11.88

Ahreum:
Weight of beam:
Weight it carried: 5809g
Ratio - 1:17.44

Tugce:
Weight of beam: 378.1
Weight it carried: 5760g
Ratio - 1:15.23

Lukas:
Weight of beam: 36.8g
Weight it carried: 1782.6g
Ratio - 1:48.44

Heather:
Weight of beam: 56.3g
Weight it carried: 2235g
Ratio - 1:39.7

Peter:
Weight beam: 27.2g
Weight it carried:602g
Ratio - 1:22

Jonny:
Weight of beam: 1lb
Weight it carried: 162.2lb
Ratio - 1:162

John:
Weight of beam: 158.3g
Weight it carried: 11.32kg = 11320g
Ratio - 1:71.5

Jill:
Weight of beam: 211.2g
Weight it carried: 3636.4g
Rario - 1:17.22

Julia:
Weight of beam: 292.8g
Weight it carried: 1915.8
Ratio - 1:6.45

Eric:
Weight of beam: 342.4g
Weight it carried: 11,676 g
Ratio: 1:34

Kyle:
Weight of beam: 453.6 g
Weight it carried: 7615.4
Ratio – 1:16.8

Rodrigo:
Weight of beam: 87.4 g
Weight it carried: 502.6
Ratio – 1:5.75

Jenny:
Weight of beam: 264.
Weight it carried: 6409.7
Ratio – 1: 24.25

Resin Codes

Start to collect different types of plastic. Sort by recycle codes. You can trade and share amongst your class mates. Try to collect samples of each type.

Documentation

Results must be repeatable by someone else using your notes (recipe.)
Keep records in a more formal and specific way.
For instance, using a scale or balance is preferable to volume measurements. A small diet or postal scale would work, or you could devise a simple pan balance. In lieu of mass measurement, volume is acceptable, but be more descriptive.
Is the measuring spoon accurate? Who (what company) manufactured it? Is it a standardized measure?
Did you sift particulates first, or compact them by compression?
Did you strike off the excess at the rim or just use the angle of repose of the substance?
Were you careful to read liquid measurements at the meniscus? Did any have a high surface tension which could affect measuring
Were you using standard measurements (a small spoon from your tableware vs. a measuring spoon made for that purpose ?) English or Metric?

When describing components (ingredients) list brand names and specifics like "King Arthur" brand Bread Flour, from the 16 oz. paper wrapped container. Include label information as in " Acme brand white vinegar, acetic acid 5%. Use standardized or single components when ever possible. An example might be to use regular flour rather than baking mix.
Give dates for perishable items like "Borden's Dairy, PA," milk, 2% milk fat, use by date 08-25-10. Give storage and use temperatures as in keep refrigerated at 40ºF, warm to room temp between 65-75ºF before combining.

Sounds like a lot, but if you write things down as you go, its all there when you need it later for the write up. Be systematic and plan ahead.

Image Paper Archive

Adhesive Lab

Product Use Data collection.
Apply product in a controlled manner. Time drying/setting. Repeat each test at least 3 times, more times would be better. Perform tests. Keep good notes. Take photographs. Make sketches. Limit variables. Use controls. Compile class data. Create graph. Make conclusions based on your analysis of the information. List other possible situations/ further research.

Bike Energy Recovery

Bike wheel assist motor developed by students.