- What is the wavelength of an electron having the following energy? 16eV and 160eV?

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Sum of four numbers in arithmetic progression is 16. The square of the last number is the square of the first number plus 48. What r the #'s? A fossil that forms when hardend minerals replace all or part of an organism is called a what? In Newton relativity moving masses become smaller when viewed from a long distance in space,so what happens to Time? Nachos or Salsa? Find an explicit rule for the nth term of a geometric sequence where the second and fifth terms are -12 and 768, respectively.?