Let period of pendulum B be $ x $ seconds.
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- Divide by 3: $ x = 40 $.
- #### 40
- In a virtual physics lab, students explore pendulum periods. The period of pendulum C is $ \frac{2}{5} $ seconds more than the period of pendulum B. If the sum of their periods is 4.6 seconds, what is the period of pendulum B?
- Then period of C is $ x + \frac{2}{5} = x + 0.4 $.
- Sum: $ x + (x + 0.4) = 4.6 $.
- Simplify: $ 2x + 0.4 = 4.6 $.
