Wed Feb 9, 2011

BULA!

Hand back Course Expectation Quizzes

Beautiful day for the Sun Lab

Went over how to gather data, how to calculate the uncertainty using the min max method, how to calculate the uncertainty using the method of relative uncertainty.

Went outside and did the lab.

Lab write-up due tomorrow:

Name:
Partners:
Date:
Name of Lab: Sun Lab

Data Table:
(In data table format)
distance from hole to screen (cm): L +/- delta L
diameter of image (cm) D +/- delta D

Calculations:
Min Max Method:
Max value of ratio = (L+deltaL)/(D-deltaD)
Min value of ratio = (L-deltaL)/(D+deltaD)

Ratio = (Max+Min)/2

Unc = (Max-Min)/2

Value = ratio +/- unc (given to correct number of sig figs and decimal points)

Method of Relative Uncertainty
Ratio = L/D
unc = ratio *(deltaL/L + deltaD/D)

Value = ratio +/- unc (given to correct number of sig figs and decimal points)

Conclusions:
The number of Suns that span the distance from the Earth to the Sun, as calculated by the Min Max Method = ratio +/- unc

The number of Suns that span the distance from the Earth to the Sun, as calculated by the Method of Relative Uncertainty = ratio +/- unc