Which of the following Period 4 elements has the largest atom?
a. Kr
b. Ga
c. Ca
d. Br
c
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The part of the universe we can see is referred to as the
A) observable universe B) Milky Way C) entire universe D) multiverse
A galaxy is observed receding from Earth with a speed of 9800 km/s. A redshifted spectral line originating in the galaxy is compared to the same spectral line originating in the laboratory
If Hubble's law is valid for this galaxy, what is the ratio of the wavelength of the redshifted line to that of the unshifted line if the Hubble constant is 22 km/s per million light-years? (c = 3.00 × 108 m/s, 1 ly = 9.461 × 1015 m, 1 y = 3.156 × 107 s) A) 1.033 B) 1.072 C) 1.052 D) 1.091 E) 1.130
Water undergoes viscous flow through two pipes with the same pressure difference between the ends. Pipe 1 has three times the diameter as pipe 2. Pipe 1 has 2 times the length of pipe 2. If the flow rate through pipe 1 is 0.400 
then what is the flow rate through pipe 2?
A. 
B. 
C. 
D. 
E. 
Which of the following best describes a breadcrumb trail?
A. A hidden menu that expands when a visitor points to or clicks on it. B. A menu that drops down to display subcategories when the visitor points to or clicks on it. C. An index of pages on a website, presented on a separate site map page. D. A hierarchical outline or horizontal list that shows the path from the home page to the currently viewed page.