Solar Cooker Project Physics

Description:  Build a solar powered device that cooks an egg within a 30 minute time period while positioned over grass.  

You should build and test several versions before test day to ensure a good grade.  

The device must be small enough to transport to class regularly when folded, and must have a mechanism to prevent it from blowing away or falling over unaided.    Nothing larger than 70cm L X 70cm W X 70cm H , and must be completely powered by the sun.  No fossil fuels or combustion or electricity.  You may not use solar electric panels.  

Partners:  Individual or teams of two allowed.  Different grades will be assigned to partnerships if one partner fails to demonstrate understanding and or work on the project.

Value:  100 points

Due Date:   Monday June 5, 2017  during class for per  4 , per 7   and after school 2:35 for per 1 and 3

Grading:

Fully cooked egg, firm or rubbery with no give  (yolk and white ) = A ((90-100)  (Not translucent, everything solid, no runniness)

¾ cooked egg  = B (89.5-80) (Mostly non translucent (mostly white) , Significant runniness or yolk partially cooked)

½ cooked egg = C  (70-79.5) (Significant translucence, runniness and yolk mostly uncooked)

¼ cooked egg = D (65-69.5) (Mostly translucent, yolk uncooked, very little cooking.  

No cooking = F      (50-64.5) (No evidence of cooking but you test a cooker)

No device tested = F  = Zero

Extra + 2 points if the total market value of materials is less than $10 as decided by the instructor.  Reusable cook pots are not part of the calculation, but glass, plastic, foam, paint do count.   Try and use as much post consumer material as possible if appropriate.    Example---- substituting  shredded newspaper as insulation instead of builders fiberglass or foam.

A ten point deduction will be assigned  to projects that do not have  active defense against wind or tipping over.  Plan on their being wind on test day.   3-4  tent stakes with strings firmly attached to your cooker is sufficient.   o