Use "second power" in a sentence

1. Hundreds, tens and units are all powers of 10 as the hundreds represent 10 to the second power, the ten represents 10 to the first power and unit represents 10 to the zero power

2. A second powerful hook hit her, this time on the right cheek, making her fall sideways on the deck

3. utilize a second powerhead to keep the water moving within the reactor chamber