1. Cheng rubs a balloon on a wool sweater and then holds it next to another balloon. The other balloon moves away from the balloon he is holding. What hypothesis might Cheng be testing? aHow much electric charge can a balloon hold?bCan electric charge be transferred from one balloon to another?cWhere does electric charge go when it is transferred out of a wool sweater?dWhat happens when a charged balloon is placed near another charged balloon?2. A scientist is working with a pith ball that has a small negative charge. This would cause it to be MOST strongly attracted to which object? aa balloon with a large positive charge that is 5 cm awayba balloon with a large negative charge that is 5 cm awayca balloon with a large positive charge that is 50 cm awayda balloon with a large negative charge that is 50 cm away

Based on your experiments with the Balloons and Static Electricity simulation (PhET), complete the following sentences:Once the balloon has acquired the charge, it is attracted to the when placed in the space between the sweater and wall. When the balloon is placed in contact with the wall,

Select all of the options that correctly complete the sentence.After rubbing the balloon against the sweater, the balloon:was attracted to an object with positive chargerepelled an object with positive chargehad lots of extra electronsrepelled electrons in the wall

In the classroom activity, you were able to make the plastic float above the balloon because........ aThe charge on the plastic was negative and the charge on the balloon was positive. bThe charge on the plastic was positive and the charge on the balloon was negative. cThe charge on the plastic and balloon were both negative. dThe charge on the plastic and balloon were both positive.

1. A boy rubs his dog with a balloon. The dog gets 20,000 extra electrons.a. What is the charge on the dog?b. Then the boy rubs a piece of silk on his cat. The cat LOSES 30,000 electrons to the silk. What is thecharge on the CAT?c. Finally, the boy places his cat (20 kg) on frictionless ice and he places his dog (35 kg) standing 2maway on the edge of the ice.i. Calculate the electrostatic force on the CAT from the DOG. Do they ATTRACT or REPEL?ii. What is the initial acceleration of the cat?iii. What is the electrostatic force on the DOG from the CAT? Why is this answer the same as ordifferent from “i”?iv. What is the initial acceleration of the dog? Why is this answer the same as or different from “ii”?

A silk cloth gains electrons when rubbed over a glass rod. A different glass rod gains electrons when rubbed with rabbit fur. What will happen if the two charged glass rods approach one another and why? A. The rods will repel each other because they have unlike charges. B. There will be no reaction between the rods. C. The rods will attract each other because they are both positively charged. D. The rods will attract each other because they have unlike charges. E. The rods will repel each other because they have like charges.