Primary menu on IPad

Hi 1. Our primary menu do not work as desired. The drop down elements of the menu do not function on IPad. 2. On small (mobile) devices the custom menus in the secondary sidebar are displayed below the content. Is it possible to rather display the secondary sidebar custom menus as a "hamburger" menu or similar at the top of the page for small devices. The site url is: http://energyfaculty.com Your advice on the above issues would be very much appreciated.