Author Question: You want to have an electron in an energy level where its speed is no more than 66 m/s. What is ... (Read 40 times)

nelaaney · **on:** Jul 29, 2018

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)
A) 5.5 m
B) 11 m
C) 2.8 m
D) 1.4 m

Question 2

A machinist with normal vision has a near point at 25 cm. The machinist wears eyeglasses in order to do close work. The power of the lenses is +4.25 diopters. With these eyeglasses, the near point of the machinist, in cm, is closest to:

A) 12
B) 10
C) 7
D) 15
E) 17