A nucleus (mass no. 238) initially at rest decay into another nucleus (mass no 234) emitting an α particle (mass no - 4) with the speed of 1.17 × 10 7 m/sec. Find the recoil speed of the remaining nucleus.
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2.0 × 10 5 m/s
Sol. 238 × 0 = 4 × 1.17 × 10 7 + 234 × v 2
V 2 = –2 × 10 5 m/ses
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