Respostas

2013-07-19T16:17:42-03:00
25=180/deltaT.
T= 180/25
T= 7,2 s
5 4 5
2013-07-19T18:03:14-03:00
25=180/ΔT
25ΔT=180
   ΔT=180/25
   ΔT=7,2 s
5 4 5