Why is an echo weaker than the original sound? 1. The echo has a shorter wavelength than the original sound due to the reflection
. 2. The echo has a smaller amplitude than the original sound because sound spreads and its intensity decreases with distance. 3. The echo has a longer wavelength than the original sound due to the reflection. 4. The echo has a higher frequency than the original sound due to the reflection.
The echo is weaker than the original sound since the echo has a smaller amplitude than the original sound because sound spreads and its intensity decreases with distance. For example, when the sound from a speaker is heard and is compared to its echo, the echo heard has a lower amplitude than the actual sound.
Kinetic and potential energies are found in all objects. If an object is moving, it is said to have kinetic energy (KE). Potential energy (PE) is energy that is "stored" because of the position and/or arrangement of the object.
