The heart beat of a person is 72 per minute .Its frequency is

Options

A. `1 s^-1`
B. `1.2 s^-1`
C. `7.2 s^-1`
D. `0.8s^-1`

Answer

To find the frequency of a person's heartbeat given that it is 72 beats per minute, we can follow these steps:

### Step 1: Understand the relationship between beats per minute and frequency.
Frequency (f) is defined as the number of occurrences of a repeating event per unit of time. In this case, the event is the heartbeat.

### Step 2: Convert beats per minute to beats per second.
Since the heartbeat is given in beats per minute (bpm), we need to convert this to beats per second (bps).

1 minute = 60 seconds, so we can convert the heartbeat rate as follows:
\[ \text{Frequency (f)} = \frac{\text{Number of beats}}{\text{Time in seconds}} = \frac{72 \text{ beats}}{1 \text{ minute}} = \frac{72 \text{ beats}}{60 \text{ seconds}} \]

### Step 3: Calculate the frequency.
Now, we perform the division:
\[ f = \frac{72}{60} = 1.2 \text{ beats per second} \]

### Step 4: Conclusion.
Thus, the frequency of the heartbeat is 1.2 beats per second.

### Final Answer:
The frequency of the heartbeat is **1.2 per second**.

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