Can someone explain this to me?
The period of oscillation of the
simple pendulum is (2.62 ± 0.11) s i. e. it lies
between (2.62 + 0.11) s and (2.62 – 0.11) s or
between 2.73 s and 2.51 s. As the arithmetic
mean of all the absolute errors is 0.11 s, there
is already an error in the tenth of a second.
Hence there is no point in giving the period to a
hundredth. A more correct way will be to write
T = 2.6 ± 0.1 s

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?