And even what props did not understand, but fortunately Galaxy Cases also considered clever, brain turn faster, lectures went on stage, there was a way, since there electromagnetic as avatar, how can we not have the critical moment. Chen Xiang in the experimental toolbox picked a metal rod, but gave up the fur, and even experimental essential pieces of grass, paper and other factors have been Galaxy S4 Cases thrown aside, only just picked up a metal rod. All of a sudden, the classroom has heard the sound of incessant ridicule, the old professor is also a look to see a joke watching Chen Xiang, waiting to see Galaxy S4 Cases fool.
Some more good students and Chen Xiang is deeply concerned for Galaxy S3 Cases whispered reminder, but all of a sudden the old professor that sharp eyes to stare back. Facing ridicule, Chen Xiang unbearably awkward, but also know that they did wrong, but in order not to cause bigger joke, but also had to continue to go wrong. But this was by no means useless metal rod. To triboelectric, let Galaxy S4 Cases does not have to be directly charged. But the problem came. Do not know ' triboelectric ' This experiment need much current, a few amps should be enough of it.
With respect to the control of the campus radio, let the metal rod with magnetic Ermao nine cattle can be considered, as long as the output current point to a metal rod in order to change the current change in the positive and negative charge, making the metal bars of charged particles increased. The metal rod, it becomes a magnet with magnetic rods, that suction, not to mention a fine needle, a small iron pieces, that is, heavy metals such as watches, can easily put Galaxy S4 Cases suck up. Material, the mutual attraction of the magnetic substance by a magnetic field is carried out, etc.. With material exists between the truth is a kind of universal gravitation, and Galaxy S4 Cases a gravitational field.
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