Iron-rich minerals in rock pointed in one direction and then switched to the exact opposite direction. this supports what idea?

Which statement best explains why an object weight less on mercury than it does on earth

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above

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