A nurse counts 72 heartbeats in 1 min. Show that the period and frequency of the heartbeats are 0.83 and 1.2 Hz, respectively.

period=60sec/72 heartbeats

frequency=72hb/min*1min/60sec

To show that the period and frequency of the heartbeats are 0.83 seconds and 1.2 Hz, respectively, we can use the following formulas:

Frequency (f) = 1 / Period (T)
Period (T) = 1 / Frequency (f)

Given that the nurse counts 72 heartbeats in 1 minute, we need to convert the time to seconds since the formulas require the values to be in seconds.

1 minute = 60 seconds

Now, we can calculate the values:

Frequency (f) = 72 heartbeats / 60 seconds = 1.2 Hz

Period (T) = 1 / Frequency (f) = 1 / 1.2 Hz = 0.83 seconds

Therefore, the period and frequency of the heartbeats are 0.83 seconds and 1.2 Hz, respectively.