To understand the interplay of observations and models you must first be able to distinguish between things that we observe and things that we infer from models. consider the following statements about the sun. classify each statement as an observation or as an inference based on the current, accepted model for the sun.
observations
the photosphere is made mostly of hydrogen and helium
the photosphere emits mostly visible light.
the corona is hotter than the photosphere.
the sun emits neutrinos.
the sun generates energy by fusing hydrogen into helium in its core.
the core temperature is 10 million k
the convection zone is cooler than the radiation zone.
the composition of the photosphere is the same as that of the gas cloud that gave birth to our solar system.

The bubba chump shrimp company processes and packages shrimp for sale to wholesale seafood distributors. the shrimp are transported to the main plant by trucks that carry 1,000 pounds (lb) of shrimp. once the continuous flow processing of the shrimp begins, no inventory is allowed in buffers due to spoilage and all of the shrimp must be processed within 12 hours to prevent spoilage. the processing begins at the sorter, where the trucks dump the shrimp onto a conveyor belt that feeds into the sorter, which can sort up to 500 lb per hour. the shrimp then proceed to the desheller, which can process shrimp at the rate of 400 lb per hour. however, after 3 hours and 45 minutes of processing, the desheller must be stopped for 15 minutes to clean out empty shrimp shells that have accumulated. the veins of the shrimp are then removed in the deveining area at a maximum rate of 360 lb per hour. the shrimp proceed to the washing area, where they are processed at 750 lb per hour. finally, the shrimp are packaged and frozen. what is the daily process capacity of the processing plant (excluding the packaging and freezing)?