Question

A ringing alarm clock is put under a glass jar. The air is slowly removed from the space around it. What will happen as the air is removed?

Answer 1

As the air is slowly removed from the space around the ringing alarm clock, the sound waves produced by the alarm clock will have a harder time traveling through the diminishing air molecules. This will result in the sound becoming muffled and eventually fading away completely as the air is completely removed. The alarm clock will continue to ring, but no sound will be heard outside of the glass jar.