Question

11 multiple choice 2 points as a sound wave travels through air, there is a net transfer of energy, only mass, only both mass and energy neither mass nor energy 12 multiple choice 2 points the number of water waves passing a given point each second is the waves frequency amplitude wavelength velocity

Explanation:

• For question 11: Sound waves are mechanical waves. Mechanical waves transfer energy through a medium (in this case, air). The particles of the medium (air molecules) oscillate about their equilibrium positions but do not undergo a net transfer of mass. So, as a sound wave travels through air, there is a net transfer of energy only.
• For question 12: Frequency is defined as the number of complete waves (or oscillations) passing a given point per second. Amplitude is the maximum displacement of the wave from its equilibrium position. Wavelength is the distance between two consecutive points (e.g., two crests) in phase on a wave. Velocity is the speed at which the wave propagates. So, the number of water waves passing a given point each second is the wave's frequency.

Answer:

1. energy, only
2. frequency