It popes
the sod makes a higher pitch
farther away
An object vibrates to produce sound. So a soundmaking object is different from the one that is silent because it produces vibrations that the silent object does not.
An object vibrates to produce sound. So a soundmaking object is different from the one that is silent because it produces vibrations that the silent object does not.
Light reflects and sound just bounces off.
It will go down (Doppler Effect) because the apparentwavelength of the sound gets greater.
it's either a human moving the object or it is just vibrating itself.
Sound only happens when there is a collision with another object or a vibration from another object, because that is what a sound is. It can only be soft, loud, strong, weak, light, pitched etc. because it was moved by other existing objects. So sound happens when objects collide or become vibrated.
It popes
Sound waves travel through any medium with the exception of vacuum. The denser the medium, the faster the sound waves travel, because the waves can be farther apart..
Making some sound (ringing a bell, dropping an object, etc.) inside a vacuum.
Some of it is absorbed. Most of it is reflected according to the normal rules of reflection.