If a proton and an electron have the same speed, which one has the longer de Broglie wavelength?
A) the electron
B) the proton
C) It is the same for both of them.
Question 2
How many electrons are necessary to produce 1.0 C of negative charge? (e = 1.60 10-19 C)
A) 1.6 109 B) 6.0 1023 C) 6.3 1018 D) 6.3 109 E) 1.6 1019