Two synchronous developments were the invention of refrigeration and the completion of the railroad; because they happened at the same time, these two technologies were used together to great effect. The synchronous or simultaneous abilities of trains traveling across the country while their large refrigeration units kept food fresh changed the way people ate. Now a salad from California and green beans from Virginia could be eaten in synchronous fashion or at same time in New York City.
Quiz: What is an example of synchronous actions?
- A car that drives over railroad tracks right before a train arrives.
- The movements of two dancers that occur at the same time.
- A goal in soccer that is scored just seconds after the game ends.