Intensity: About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun, which is 1.5 × 1011 m away. Use this information to estimate the average power output of the sun.
A. 1 × 1026 W
B. 2 × 1026 W
C. 3 × 1026 W
D. 4 × 1026 W
Answer: D
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In a network thermoset polymer, there is _________-dimensional covalent bonding.
Fill in the blank(s) with the appropriate word(s).
The rotation curve of a galaxy is important in determining the galaxy's ____
a. mass b. age c. luminosity d. type e. diameter
From Kepler's third law, an asteroid with an orbital period of 8 years lies at an average distance from the Sun equal to
A) 16 astronomical units. B) 4 astronomical units. C) 8 astronomical units. D) 2 astronomical units. E) It depends on the asteroid's mass.
A vertical tube one meter long is open at the top. It is filled with 75 cm of water. If the velocity of sound is 344 m/s, what will the fundamental resonant frequency be (in Hz)?
a. 3.4 b. 172 c. 344 d. 1.7 e. 688