A solid meighth 20 gf is
20 gf in air and 18gh in water-find the specitic gravity of the solid?

Where do magnetic lines of force enter earth?

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

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?