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Q. A 465 capacitor is charged to 295. Then a wire is linked between the plates. How many joules of thermal energy are produced as capacitor discharges if all of energy that was stored goes into heating the wire?

Q. An arrow is fired with a speed of 23 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into block before coming to rest relative to it. All through this process the arrow's deceleration has the magnitude of 1600m/s2 and the block's acceleration has a magnitude of 450 m/s2.

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