1. (c) A man Frequency of a sound is directly proportional to its pitch and inversely proportional to its amplitude. The voice of an adult man is of lower pitch and high amplitude in comparison to the voices of a baby boy, a baby girl and a woman. The voice of a baby girl has highest pitch among this gRead more

    (c) A man
    Frequency of a sound is directly proportional to its pitch and inversely proportional to its amplitude. The voice of an adult man is of lower pitch and high amplitude in comparison to the voices of a baby boy, a baby girl and a woman. The voice of a baby girl has highest pitch among this group.

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-13/

    See less
    • 0
  2. Sound can travel through (d) solids, liquids and gases. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-13/

    Sound can travel through (d) solids, liquids and gases.

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-13/

    See less
    • 0