Initial data: ν (vibration frequency of the considered body) = 20 kHz.
SI system: ν = 20 kHz = 20 * 10 ^ 3 Hz.
The oscillation period of the body in question can be determined by the following formula (the period is inversely proportional to the frequency): T = 1 / ν.
Calculation: T = 1 / (20 * 10 ^ 3) = 0.05 * 10 ^ -3 s = 0.05 ms.
Answer: The oscillation period of the body in question is 0.05 ms.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.