What are the two most abundant elements found in Earth's crust?
The two most abundant elements are oxygen and silicon.
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A series RLC ac circuit has a capacitive reactance of 55
and inductive reactance of 25
and a resistance of 40
What is the impedance of this circuit?
A. 12
B. 95
C. 70
D. 10
E. 50
Which of the following is true of carbon atoms?
A) They are not crucial to life. B) They can form long, complex, stable chains. C) They have the ability to replicate. D) They link together to form proteins.
The nebular theory of the formation of the solar system successfully predicts all but one of the following. Which one does the theory not predict?
A) Planets orbit around the Sun in nearly circular orbits in a flattened disk. B) the compositional differences between the terrestrial and jovian planets C) the equal number of terrestrial and jovian planets D) asteroids, Kuiper-belt comets, and the Oort cloud E) the craters on the Moon
As it orbits the Earth, the Moon appears to move its own diameter (0.5 degrees) eastward every hour against the background stars
Indicate whether the statement is true or false