A dipper makes 24 complete oscillations in 6.0 s. What is the frequency?
0.25 Hz0.25\ \mathrm{Hz}0.25 Hz
4.0 Hz4.0\ \mathrm{Hz}4.0 Hz
18 Hz18\ \mathrm{Hz}18 Hz
144 Hz144\ \mathrm{Hz}144 Hz