Anumber has a atomic number of 9 and an atomic mass of 19 amu. how many protons and how many neutrons are present in the atom

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!