As you add additional light bulbs in series, evaluate which graph represents the total voltage across the light bulbs.

A) A
B) B
C) C
D) D

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?