A balloon is negatively charged by rubbing, and then it clings to a wall. Does that mean the wall is positively charged? Why does the balloon eventually fall?
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- A neutral plastic strip is rubbed with cotton and acquires a positive charge. Which of the following statements are true of the positively-charged strip? It lost some electrons to the cotton during the charging process. It lost all of its electrons to the cotton during the charging process. It has the opposite charge as the cotton. It would now be repelled by the piece of cotton which was used to charge it. It gained protons during the rubbing process. As a material, plastic has a greater affinity for electrons than cotton. It could exert either a repulsive or attractive influence upon neutral paper bits. It has an excess of protons compared to the number of electrons. It could be used to charge an electroscope negatively by the process of induction. It lost negative electrons and gained positive electrons during the charging process. It lost neutrons during the charging process (or at the very least, its neutrons became ineffective).A positively charged object with a charge of +85 nC is being used to balance the downward force of gravity on a 1.8-gram balloon that has a charge of -63 nC. How high above the balloon must the object be held in order to balance the balloon? (NOTE: 1 nC = 1 x 10-9 C)help please with questions 9,10,11
- A positively charged rod is brought close to a neutral piece of paper, which it attracts. Draw a diagram showing the separation of charge and explain why attraction happens.15Describe how two pieces of aluminum foil interact with each other after they have been charged up by a PVC pipe previously charged by cloth. Explain why this interaction occurs.