Where is La Sénia?

La Sénia is a small village with a population around 6.000 inhabitants. It is situated 200 km south from Barcelona.

This is our school, "Institut de La Sénia". There are about 50 teachers and 450 students.

 

Summary of our results (more details in the subpages)

G1 Simple Pendulum                  9.86 +- 0.02 m/s2

G2 Body Mass and Gravity Force  9.855 +- 0.080 m/s2

G3 Subatmospheric Pressure        9.31 +- 0.45 m/s2

G4 Inclined Plane                        no news yet

 

How to calculate errors in measurements

How to calculate a confidence interval:

http://www.wikihow.com/Calculate-Confidence-Interval

Z table:

https://en.wikipedia.org/wiki/Standard_normal_table

Dades i errors (in Catalan)

 

CONCLUSIONS

According to this source:

http://www.isobudgets.com/how-to-calculate-local-gravity/

the gravity value in our village is:

9.8011 m/s2

Therefore, the interval of the result of G2 match this value, and intervals of G1 and G3 are very close to it. Taking in account that we had not the best measurement conditions and that we had no much time to improve the procedures, we consider acceptable the results obtained.