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Hot-air balloons were originally propelled, not by heating the air, but by releasing helium or hydrogen. The gases, being less dense than air, generated the lift to carry the balloons skyward. These gas balloon-aircrafts were outfitted with sandbags to provide ballast. When the pilot wanted to gain altitude, he would throw the sand overboard so that, free of the extra weight, the balloon could soar to its highest potential.Most of us have sandbags in our lives that hold us down and keep us from reaching our full potential. Burdened by them, we're stuck cruising at low altitudes, near to the...}
Vía The John Maxwell Company http://ift.tt/1mN9vhP
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