Created by StemPy LabA balloon is rubbed on a woollen sweater and becomes negatively charged. Which statement is correct?
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← A sample starts as a pure radioactive nuclide A, of half-life 6.0 h. Each nucleus of A decays into a nucleus of B, which is itself radioactive, with a half-life of 2.0 h, and decays into a stable nuclide. After how long is the activity of B in the sample greatest?A charged rod is brought near a light ball that hangs from a thread, and the ball swings towards the rod. What can we say for sure about the ball? →
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