Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest. Also called major depressive disorder or clinical depression, it affects how you feel, think and behave and can lead to a variety of emotional and physical problems.
Answer: Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. Buoyancy is an upward force that the air exerts, and it helps hot-air balloons and blimps stay in the air. A hot air balloon uses a burner to heat up the air inside the balloon.
Not only did it renew the morale of the American public, but it convinced potential foreign partners, such as France, that American could win the war<span>, and that it might be in their best interests to send aid.</span>
Because they had enough strong government under the British.
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1. The engineers made pontoons so that they could easily cross rivers.
2. They dug beneath the enemy's city walls to weaken them.
3. Used battering rams to hammered the enemy city's gates.
