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12) A 2.0 kg firecracker that was initially sliding along the floor at 1.0 m/s (to the right) explodes with an internal energy of 10,000 J. If the firecracker breaks into two pieces that move in opposite directions, with the first piece having a mass of 0.75 kg and a speed of 30 m/s (to the right), then how much energy was converted into heat during the explosion? A) 0 kJ B) 1.5 kJ C) 2.7 kJ D) 4.3 kJ E) 9.5 kJ
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2)From momenlery uhcl >.½xo.TX302一十ザト3.x(14-y)- 飞.avnourr cǐhe..d

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