Odpowiedzi

2009-10-07T18:12:33+02:00
90/0,5 min
0,5min=30s
90/30s=3s⁻¹=⅓Hz

360/5 h
5h=18 000s
360/18000s=0,02⁻¹=50Hz

30/2h
2h=7200s
30/7200s=0,004167⁻¹≈240Hz
1 1 1