Yes - it's still a rubber band.
Stretching a rubber band is a physical change.
Yes - it's still a rubber band.
Stretching of a rubber band is a physical change because the molecular structure of the rubber remains the same even after it is stretched. No new substances are formed during stretching, and the rubber band can return to its original shape and properties once the force is removed.
Stretching a rubber band is a physical change because it alters the shape and size of the rubber band without changing its chemical composition. The rubber band can return to its original state by releasing the tension, demonstrating that no new substances were formed during the stretching process.
Stretching wire into copper is a physical change because the composition of the material remains the same. The rearrangement of copper atoms in the wire does not alter the chemical identity of the substance.
It is a physical change.
If you meant to ask, "Is stretching copper into wire a physical or chemical change", it's a physical change.
Stretching a rubber is a physical change because the rubber's molecules are simply being rearranged without any new substances being formed. Chemical changes involve the creation of new substances with different chemical properties.
Yes, the sound produced when you pluck a rubber band while stretching it will change. As you stretch the rubber band, you increase the tension on it, causing the frequency of vibrations to increase and resulting in a higher-pitched sound. Conversely, releasing the tension will lower the pitch of the sound produced.
Stretching a piece of plastic until it breaks is a physical change because the bonds between the plastic molecules are being rearranged and broken without changing the chemical composition of the plastic itself.
Stretching a rubber band involves applying a force to overcome intermolecular forces within the band's polymer chains. This process causes the polymer chains to align in the direction of the force, storing potential energy in the band. Elasticity allows the rubber band to return to its original shape when the force is released.
One example of stretching a rubber band is pulling it from both ends to increase its length and storing potential energy in the process.