Richard and Kakewa are using bar magnets in a science lesson. They begin to throw magnets on the floor. When they pick the bar magnets up they no longer work. The magnets have become what?

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

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