Gravity is an attractive force between
A. all objects everywhere
B. Earth and objects on Earth
C. Earth and Moon, and objects on Earth
D. all massive objects
Answer: A. all objects everywhere
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The emission of a line from the Balmer series is followed almost immediately by the emission of a line from the Lyman series. This will be true for
a. only the first line of the Balmer series and the first line of the Lyman series. b. all the lines of the Balmer series followed by only the first line of the Lyman series. c. only the first line of the Balmer series followed by any of the lines of the Lyman series. d. all the lines of the Balmer series followed by any of the lines of the Lyman series.
Potential: A proton that is initially at rest is accelerated through an electric potential difference of magnitude 500 V. How much kinetic energy does it gain? (e = 1.60 × 10-19 C)
A. 500 J B. 8.0 × 10-17 J C. 1.6 × 10-19 J D. 800 J
Coulomb's Law: 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 = 1/4??0 = 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