Beschrijving
This book introduces students to the concept of sound. How can sounds be heard but not seen? How does sound travel through air and at what rate of speed?
This book introduces students to the concept of sound. How can sounds be heard but not seen? How does sound travel through air and at what rate of speed?
This book introduces students to the concept of sound. How can sounds be heard but not seen? How does sound travel through air and at what rate of speed?