Middle School

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David’s pulse is 80 beats per minute.

What is the frequency of his pulse in beats per second?

How long does it take between heartbeats?

Answer :

David's pulse is 80 beats per minute, which equates to approximately 1.33 beats per second. The time between each of David's heartbeats is roughly 0.75 seconds. During strenuous exercise, a heart rate of 150 beats per minute would result in 0.4 seconds per beat.

David's pulse is 80 beats per minute, and to find the frequency in beats per second, we divide the number of beats per minute by 60, the number of seconds in a minute. Therefore, 80 beats per minute divided by 60 seconds per minute gives us approximately 1.33 beats per second. To find out how long it takes between heartbeats, we take the inverse of the frequency. Since the frequency is 1.33 beats per second, the time between heartbeats is 1/1.33, which equals approximately 0.75 seconds per heartbeat.

During systole, the heart muscle contracts, and during diastole, the heart muscle relaxes. The normal heart rate at rest is around 72 beats per minute, but during strenuous exercise, it can rise significantly. If, for example, the heart rate reaches 150 beats per minute during exercise, we can calculate the time per beat in seconds by dividing 60 (the number of seconds in a minute) by 150, which gives us 0.4 seconds per beat.

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Rewritten by : Barada

Answer:

1.333 beats/s

It takes 0,755 s per beat

Explanation:

If we want to convert this frequency from beats per minute to beats per second, we have to do the following:

[tex]80\frac{beats}{min} \frac{1min}{60s}=1.333\frac{beats}{s}[/tex]

This means that in 1 second David has 1.333 heart beats.

Now, if we want to know how long does it take between heart beats, we can use the mathematical Rule of Three:

1.333 beats ---- 1s

1 beat ------ ?

[tex]?=\frac{(1 beat)(1s)}{1.333 beats}[/tex]

[tex]?=0.75 s[/tex] This means there are 0.75 s between heart beats