1. When the hydrogen electron falls from an unknown higher energy level n=x to a lower energy level n=y, the emitted photon strikes a copper plate, and ejecting an electron with zero velocity. Find the unknown higher and lower energy levels. (Hint: before you start solving for x and y, you need to search for the binding energy for Copper metal). (25 points)

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.