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Author Question: The zirconium nucleus contains 40 protons, and an electron is 1.0 nm from the nucleus. What is the ... (Read 38 times)

washai

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on: Jul 29, 2018
The zirconium nucleus contains 40 protons, and an electron is 1.0 nm from the nucleus. What is the electric force on the electron due to the nucleus? ( e = 1.60  10-19 C, k = 1/40 = 9.0  109 N  m2/C2 )
 
  A) 2.9 nN
  B) 1000 C
  C) 3.7 nN
  D) 6.8 nN
  E) 9.2 nN

Question 2

A 1.0-g bead is at (-2.0 cm, 2.0 cm), a 2.0-g bead is at (2.0 cm, -4.0 cm), and a 3.0-g bead is at (2.0 cm, 0.0 cm). What are the coordinates of the center of mass (or center of gravity) of this system of beads?
 
  What will be an ideal response?


ryansturges

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Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

1.3 cm, -1.0 cm


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