An astronaut inside a spacecraft's pressurized cabin strikes a metal pipe with a wrench, and another astronaut nearby hears the sound clearly. If all the air is then pumped out of the cabin to create a vacuum, and the astronaut strikes the pipe in the same way, what will the other astronaut (who is floating and not touching the cabin walls or the pipe) hear?
a louder sound
a quieter sound
a sound of the same loudness
no sound at all
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.