Galileo is hired by the duke of Tuscany to manage castle defenses for the Duke of Tuscany.
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Galileo is hired by the duke of Tuscany to manage castle defenses for the Duke of Tuscany. The castle's cannons are tested and found to launch cannonballs with a velocity of 52.7 m/s. Invaders come and set up at a distance of 233 m from the castle walls behind a low wall of unknown height. The castle's walls (from which the cannons are fired) are known to be of height 30 m.
At what angle (in degrees) must the guns be pointed above the horizontal to hit the invaders?
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