You want to have an electron in an energy level where its speed is no more than 66 m/s. What is the length of the smallest box (an infinite well) in which you can do this? (h = 6.626 10-34 J s, mel = 9.11 10-31 kg) Question 10 options: 1) 5.5 m 2) 11 m 3) 2.8 m 4) 1.4 m