A molecule of roughly spherical shape has a mass of 6.10 × 10-25 kg and a diameter of 0.70 nm
The uncertainty in the measured position of the molecule is equal to the molecular diameter. What is the minimum uncertainty in the speed of this molecule? (h = 6.626 × 10-34 J ? s)
A) 0.78 m/s
B) 7.8 m/s
C) 78 m/s
D) 0.078 m/s
E) 0.0078 m/s
A
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The CNO cycle produces energy by fusing
A. silicon into iron. B. hydrogen into helium. C. neon into magnesium and oxygen. D. carbon and nitrogen into oxygen.
A neutral atom has an electron configuration of 1s22s22p63s23p2. How many protons does it have in its nucleus?
A) 5 B) 11 C) 14 D) 20 E) 26
Size of the Nucleus: What is the approximate nuclear radius of an isotope of sodium with 11 protons and 12 neutrons?
Fill in the blank(s) with the appropriate word(s).
A person looking through eyeglasses sees
a. real images. b. virtual images. c. erect images. d. inverted images. e. polarized images.