An astronaut on the Moon uses a hammer to strike a metal landing leg of a lunar module. A second astronaut is floating nearby using a harnessed thruster, making no physical contact with the lunar module or the ground. There is no atmosphere on the Moon.
Compared with the sound that would be heard if they were working on Earth, what does the second astronaut 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.