1. R

2. What particles make up a neutral atom? Ans. Electrons (necessary), protons (necessary), neutrons (optional in hydrogen)

3. What is the charge of 100,000 electrons? Ans.  1.6  10 -19 C

4. State one similarity between the Law of Gravity and Coulomb’s Law Ans. Inverse- square laws

5. What is the electric force between two protons located 10 -10 m apart? Ans. 2.3  10 -8 N

6. What is the charge on ‘scope after these steps are taken: bringing + rod near grounding removing ground removing rod Ans. negative

7. What type of material is shown on the right? Ans. conductor

8. Dry paper, glass, & pure water are _________ (insulators/conductors) Ans. insulators

9. What is the electric force between two 1 C charges located 1 m apart? Ans. 9  10 9 N

10. What is the reason that microwave ovens can transfer energy so easily to water molecules? Link to simulation Ans. Water molecules resonate with the specific microwave f used in ovens

11. What is the method of charging that occurs when liquid leaves a hose very quickly Ans. friction

12. What is the change in force between two particles when charge on both triples? Ans. 9 x

13. What is the charge on ‘scope after: bringing + rod near grounding removing rod removing ground Ans. neutral

14. What is the type of material shown to the left? Ans. insulator

15. Boys who were sent to get bags of gunpowder on ships and bring them to the cannons were called powder monkeys. What is the reason powder monkeys wore no shoes? Ans. Avoid building up charge

16. What is one way to ensure equal amounts of charge on two identical insulated conductors? Ans. Touch them together

17. What is the change in force between two particles when charge on one triples and the distance between them quadruples? Ans. 3/(4 2 ) x

18. What is the type of charge on the rod? Ans. negative

19. What is the reason that the 5,000,000,000,000,000,000,000 free-moving electrons on a penny don't fly off due to repulsion Ans. Balanced by equal number of protons

20. What is the charge on + scope after touching it with a neutral copper rod? Ans. Grounds it out  neutral

21. If the radius of the Earth were reduced to ½ of its current size, what would happen to your weight? Ans. 4 x

22. If your weight is 700 N, how much gravitational force do you exert on the Earth? Ans. 700 N

23. Why did Newton think that there was a force acting on the Moon? Ans. It was not moving in a straight line

24. What is the voltage between two plates if it takes 1000 J to move 2 C between them? Ans. 500 V

25. What method of charging is shown below? Ans. conduction

26. A silk cloth rubs a glass rod. What method is used to charge the rod? Ans. friction

27. What is the name we give to the distortion of the atoms in an insulator when an electric field is present? Ans. Charge polarization