What is the primary reason why sociologists study the global economy?

How does an observation about an object differ from an inference about that object

The amount of potential energy possessed by an elevated object is equal to what?

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton