(a) What is the practical purpose of a compass? What does a compass measure?
(b) Indicate several things you notice. When the bar magnet is placed on the board, are the compasses still measuring what you indicate in part (a)? Explain your answer.
(c) Draw a bird’s eye view of the white-board. Draw arrows in the location where compasses are placed. Arrows should point towards the red end of the compasses' needles.

Calculate the minimum energy required to remove one proton from the nucleus 126c. this is called the proton-removal energy. (hint: find the difference between the mass of a 126c nucleus and the mass of a proton plus the mass of the nucleus formed when a proton is removed from 126c.) express your answer with the appropriate units. emin e m i n = nothing nothing request answer part b how does the proton-removal energy for 126c compare to the binding energy per nucleon for 126c, calculated using eb=(zmh+nmn−azm)c2?