Final answer:
The frequency of a wave that completes 10 full cycles in 1 second is 10 hertz (Hz).
Step-by-step explanation:
If a wave completes 10 full cycles in 1 second, the frequency of the wave is 10 hertz (Hz). Frequency is defined as the number of cycles per second. In this case, since there are 10 cycles every second, the frequency is directly given as 10 Hz. The concept of frequency is crucial in understanding the behavior of waves, whether they are mechanical waves like sound or electromagnetic waves like light.