Answer:
flapper valves.
Explanation:
According to my research on Aircraft Fuel Tanks, I can say that based on the information provided within the question many fuel tanks incorporate flapper valves. Like mentioned in the question these are implemented to prevent fuel from flowing away from the boost pump or tank outlet. This can happen when the aircraft is experiencing high gravity force/pressure.
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Answer:
(3)
Explanation:
The lack of food may cause many deaths.
Railroads may be an way so supplies can get around in the south
Burned buildings may fall over.
The primary purpose for a lab report is to show your findings, your process behind your finding and experiments, and to record all the data to help with any calculations you need or mistakes that need to be fixed.
Last Option is the answer
Trade is limited because of the physical barrriers on land and water.
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