Discover Questions

What is the angle of rotation of 5x(squared)+3√3y+2y(squared)+10x-16y=0? Are there any new elements that have only been located in space/not found on Earth? The angle of elevation of the sun is 28 degrees 10 minutes,the shadow of a tree on horizontal ground is 97.3 ft. long. How tall is the tree? Would pitch black solar panels be Extremly efficient for electricity production? Study by discussion or alone?