What is the iceberg model when discussing global issues? Help

"if i have seen farther than others," said newton, "it is because i have stood on the shoulders of giants." who were the giants to whom newton was referring? could this be said of any scientific accomplishment? explain.

How did the boll weevil mostly affect georgia's economy? a) it forced georgia to have a manufacturing economy. b) it caused rice to be georgia's only money-making crop. c) it caused a major upset to georgia's cash-crop economy. eliminate d) it gave more economic opportunity to the pest controllers.

What is a human capital and what is one important way you can invest in your own human capital?