Two wads of goop with masses of 0.4 and 0.6 kg, respectively, are thrown in such a manner that they meet head-on and combine to form a single mass. The magnitude c initial velocity for each is 15 m/s. What is the speed of the 1.0 kg mass immediately after collision? A. 3 m/s B. 5 m/s C. 15 m/s D. 20 m/s

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