Author Question: What element has a K line with wavelength 1.46 10-11 m? A) Protactinium B) Niobium C) Uranium D) ... (Read 51 times)

burton19126 · **on:** Jul 29, 2018

What element has a K line with wavelength 1.46 10-11 m?

A) Protactinium B) Niobium C) Uranium D) Zirconium

Question 2

A force on an object is given by F(x) = (2.00 N/m)x + (-3.00 N/m3)x3. What is a potential energy function for this conservative force?

A)

2.00 N/m - 9.00x2
B)

(-2.00 N/m)x2 + (3.00 N/m3)x4
C)

-2.00 N/m + (-3.00 N/m3)x2
D)

(-1.00 N/m)x2 + (0.750 N/m3)x4
E)

-2.00 N/m + 9.00x2