The energy of the system is E=5.5 J. This energy is the same at every moment of the oscillation. When the stretch x of the spring is maximum (so, when the stretch is equal to the amplitude: x=A) the velocity of the spring is zero, so all this energy is just elastic potential energy of the spring:

From which we find
Answer:
medium
Explanation:
A substance or particle that wave travel through is called medium. There are two main types of such medium, some contains particles and some are vacuums.
- Waves can travel through a vacuum which contains no particles.
- Some can also contain particles.
- Waves can interact in different ways with the medium.
<span>c. contains different kind of matter</span>
Mass is a property of an object. It doesn't change, no matter where the object is.
Weight is the gravitational force between two objects. It depends on the masses
of both objects, and also on the distance between their centers, so it changes,
depending on the mass of the OTHER object involved, and on the distance
between them.