Explanation Content
Sound Cup - Telephone | NCERT Class 9
Science · Class 9
Cut a PET bottle in half and connect them using a long string. You can use this to communicate over some distance with the thread being the medium for propagation of sound.
Explanation Content
Science · Class 9
Cut a PET bottle in half and connect them using a long string. You can use this to communicate over some distance with the thread being the medium for propagation of sound.