No, the amplitude of a wave produced by a tuning fork is not necessarily constant. When you strike a tuning fork, it vibrates and creates a sound wave that propagates through the air. Initially, the amplitude of the wave will be at its maximum, but it will gradually decrease over time due to various factors such as air resistance, damping, and the properties of the tuning fork itself.
The rate at which the amplitude decreases over time is determined by the characteristics of the tuning fork and its environment. In an ideal scenario with no external factors affecting the wave, the amplitude could remain relatively constant for a while, but it would eventually decay due to the inherent properties of the tuning fork.
In real-world situations, the amplitude of a wave produced by a tuning fork will typically decrease over time, resulting in a phenomenon known as "decay" or "damping."