Refer to Table 2-1. Based on the information in the table, what is the ratio of the intensity of Dra to that of Nim?
a.
2.512
b.
5
c.
8.07
d.
11.14
e.
100
E
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Venus' rotation period is longer than its period of revolution around the Sun
Indicate whether the statement is true or false
Auroras are caused by
a. gases fluorescing in the atmosphere because of collisions with solar wind particles. b. the magnetosphere of Earth touching its atmosphere. c. the ozone layer being destroyed by UV light. d. a product of the atmospheric greenhouse effect. e. scattering of sunlight from particles in Earth's stratosphere.
Which of the following people used the ideas of quantum mechanics to describe why the spectral classification scheme is in order of decreasing temperature?
A) Annie Jump Cannon B) Williamina Fleming C) Cecilia Payne-Gaposchkin D) Henry Draper E) Edward Pickering
An electron with a speed of 2.0 × 10^6 m/s moves into a uniform electric field of 550 N/C that is parallel to the electron's motion. How long does it take to bring the electron to rest? (me = 9.11 × 10^?31 kg, e = 1.6 × 10^?19 C)
a. 2.1E–8 s b. 6.4E–9 s c. 1.6E–6 s d. 1.6E–6 s e. 3.1E–7 s