The time of heart beat is of the order of

Options

A. `10^(-2)` s
B. `10^(2)` s
C. `10^(-1)` s
D. `10^(0)` s

Answer

To solve the question regarding the time of a heartbeat, we can follow these steps:

### Step 1: Understand the Question
The question asks for the time taken for one heartbeat. We know that a healthy heart beats a certain number of times in a minute.

### Step 2: Determine the Heart Rate
According to the information provided, a healthy heart beats approximately 72 times in one minute.

### Step 3: Convert Heart Rate to Time per Beat
To find the time taken for one heartbeat, we need to convert the heart rate from beats per minute to seconds per beat.

1. **Convert minutes to seconds**:
- 1 minute = 60 seconds
2. **Calculate time per beat**:
- Time per beat = Total time in seconds / Number of beats
- Time per beat = 60 seconds / 72 beats

### Step 4: Perform the Calculation
Now, we can perform the calculation:
\[ \text{Time per beat} = \frac{60 \text{ seconds}}{72 \text{ beats}} \]
\[ \text{Time per beat} = \frac{60}{72} \text{ seconds} \]
\[ \text{Time per beat} = \frac{5}{6} \text{ seconds} \approx 0.833 \text{ seconds} \]

### Step 5: Express in Scientific Notation
To express this time in scientific notation:
- 0.833 seconds can be approximated to \( 8.33 \times 10^{-1} \) seconds.

### Step 6: Identify the Order of Magnitude
The order of magnitude of \( 0.833 \) seconds is \( 10^0 \) seconds, since \( 0.833 \) is between \( 10^{-1} \) and \( 10^0 \).

### Conclusion
Thus, the time of a heartbeat is of the order of \( 10^0 \) seconds.

### Final Answer
The time of heart beat is of the order of \( 10^0 \) seconds.

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