Mr. Hitch taught us about sedimentary, metamorphic, and igneous rocks. He described how they were formed, what they contain, and showed us samples of each. He is a good geologist.
The missing word and answer is: geologist.
That n2 = 2*n1. That is, the index of refraction is twice as big in medium 2 since v=c/n
When the canoe leaked, the boat
sank because it has a leak. The boat must have a strong base at its bottom to
enable itself to float. If this is damaged, the water can now enter due to the
hole thereby increasing the velocity of water coming in.
I think its d because lifting it would make the chemical swish around and that will make it so you cant get the right measurement. hope this helps :)