Which statements are true about mass and/or density? > A balloon inflated with air has less mass than a marble
> A basketball-sized balloon filled with air has more density than a baseball-sized balloon filled with sand
> A marble has more density than a balloon inflated with air
> Objects with low density tend to sink more quickly than those with high density
> If two balls are placed in a tank of water, the one with more density will sink faster
> The more dense an object is, the lower its mass will be
PLEASE HELP!

a. the same speed as the wave energy

Explanation:

Wave packet is only an envelope of a more localized wave. The entire wave is a combination of the discrete wave packets.

Wave is any disturbance that travels across space. A wave does not carry the particles of the medium in which travels. It carries energy from one point to another  as it travels.

For an electromagnetic wave, the energy of the wave is due to the vibrations of the electric and magnetic fields of the wave. For sound waves, wave energy is the vibrations or disturbance of the particles of the medium in which the sound wave travels.