n. heavy material placed in a boat or ship to make it more stable; heavy material placed in the car of a balloon to make it more stable.
Sand bags were used as ballast for the balloon.
Sand bags were used as ballast for the balloon.
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Why were the ballast tanks not filled completely full?
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Why were the ballast tanks not closed off?
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What happened when shipbuilders removed the oxygen from the ballast tank?
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balance; brace; bracket; counterbalance
losen;let free
2 syllables
bal-last
calloused
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