### How many heartbeats are there in a lifetime?

**SOLUTION:**

The general assumptions:

- There is 1 heartbeat in 1 second
- In half a lifetime, there are seconds.

Therefore, in a lifetime, the number of heartbeats is

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# College Physics Problem 1.29

### How many heartbeats are there in a lifetime?

**SOLUTION:**

The general assumptions:

- There is 1 heartbeat in 1 second
- In half a lifetime, there are seconds.

Therefore, in a lifetime, the number of heartbeats is

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