'It's any heavy material placed in the gondola of a balloon or the hold of a ship to enhance stability'
a ballast
DOUBLE LETTERS: Its any heavy material placed in the gondola of a balloon or the hold of a ship to enhance stability
It's any heavy material placed in the gondola of a balloon or the hold of a ship to enhance stability
It's any heavy material placed in the gondola of a balloon or the hold of a ship to enhance stability
DOUBLE LETTERS
a ballast
DOUBLE LETTERS