How was manganese, a heavy element present in trace amounts in the human body, formed?
O A. Through the star cycle
B. Through the big bang
O C. By fusion in small stars
O D. By fusion in large stars

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