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 is defined as the number of occurrences of a repeating event per unit of time. In this case, we need to convert the heartbeat rate from beats per minute to beats per second.

### Step 2: Convert beats per minute to beats per second
We know that there are 60 seconds in a minute. Therefore, to convert the heartbeat rate from beats per minute to beats per second, we can use the following formula:

\[ \text{Frequency (in Hz)} = \frac{\text{Number of beats per minute}}{60} \]

### Step 3: Substitute the given value into the formula
Given that the heartbeat is 72 beats per minute, we can substitute this value into the formula:

\[ \text{Frequency} = \frac{72 \text{ beats per minute}}{60 \text{ seconds}} \]

### Step 4: Perform the calculation
Now we can perform the division:

\[ \text{Frequency} = \frac{72}{60} = 1.2 \text{ beats per second} \]

### Step 5: State the final answer
Thus, the frequency of the heartbeat is 1.2 beats per second.

### Final Answer:
The frequency of the heartbeat is 1.2 Hz.

---