The speed of light in material a is 1. 25 times as large as it is in material b. What is the ratio of the refractive indices, na/nb, of these materials?.

Why has there been such a large increase in theft and other crimes in the u. s

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

How was the sat? what type of questions for math, writing and reading. did anyone get a near perfect score and if so how long did it take to study. i am very stressed and want to get at least a 1450.