Practice problem
Frequency and Period

Source: about-bats.com
The echolocation frequency of a bat is, on average, 45 kHz. To 3 significant figures, what is the period of one echolocation emission? (1 kHz = 1000 Hz)
Practice problem

Source: about-bats.com
The echolocation frequency of a bat is, on average, 45 kHz. To 3 significant figures, what is the period of one echolocation emission? (1 kHz = 1000 Hz)