Question

Which sentence explains why the wall sometimes vibrates in a room when the sound is coming from a projector?

A) Sound waves can travel through different types of mediums like gas and solid particles, carrying sound energy from the projector and leaving the projector to enter the walls of the room. These particles entering the walls cause the walls to vibrate.

B) Sound waves cannot travel through different types of mediums; they can only travel through liquid. Sound is in making the walls vibrate, it is the radiant energy from the light waves that makes the walls vibrate.

C) Sound waves can travel through different types of mediums like gas, and solid particles in the air collide with the particles in the wall to transfer the sound energy from the air to the walls of the room.

D) Sound waves cannot travel through different types of mediums; sound waves can only travel through gas. When the particles in the air collide with the particles in the wall, the energy stops moving.

Answer 1

Sound waves can travel through mediums like air and solids, causing the wall to vibrate when sound from a projector transfers energy to the wall's particles. The correct option is C.

Step-by-step explanation:

The correct sentence explaining why the wall sometimes vibrates in a room when sound is coming from a projector is: Sound waves can travel through different types of mediums like gas, and solid particles in the air collide with the particles in the wall to transfer the sound energy from the air to the walls of the room. This transfer of energy causes the wall to vibrate in response to the sound waves emitted by the projector. This explanation reflects the nature of sound waves as mechanical waves that require a medium to travel through, such as air or solids. Unlike light waves, which are electromagnetic and can travel through a vacuum, sound waves need a medium to propagate, and when they encounter another medium like a wall, they can be reflected or absorbed, causing vibrations.