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A rock is dropped off the side of a bridge and hits the water below 7.5 s later.
(a) What was the rock's velocity when it hit the water?
Speed
Direction
(b) What was the rock's average velocity as it fell?
speed
(c) What is the height of the bridge above the water?
A 860 ? resistor is connected to a variable-voltage power supply. What current flows in the resistor when the voltage is 15 V?
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Quadrupole moments in the shell model
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An alien race has evolved such that their eyes work exactly like ours except their eyes can be modeled with a biconcave lens. WHen they come to visit us, what kind of glasses would you prescribe
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