Felix carries a 2 N suitcase up three flights of stairs (a total height of 10 m). Next, he uses a rope and pulley to lift the suitcase upward 7 more meters with a force of 2 N. How much total work does Felix do on his suitcase during this entire motion?

How do you know how many valence electrons an atom has?

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?

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.