The specific weight of air at 5 km is nearest:
Physics & Space Science
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An electron is moving at 
m/s perpendicular to a uniform magnetic field. If the radius of the motion is 18 mm, what is the magnitude of the magnetic field?
A. 70 mT
B. 0.95 mT
C. 9.3 mT
D. 1.6 
T
E. 8.9 nT
Physics & Space Science
Estimation: Which of the following is the most reasonable estimate of the number of characters (typed letters or numbers) in a 609-page book? Assume an average of 194 words per page and a reasonable average number of letters per word.
A. 5 × 105 char B. 5 × 107 char C. 5 × 106 char D. 5 × 104 char
Physics & Space Science
Draw the structural formula for 1-chloro-2-methylpentane
Physics & Space Science
Why are sedimentary rocks and the processes that produce them more accessible than igneous and metamorphic rocks?
Physics & Space Science