P-waves travel faster through the inner core than the outer core because the inner core is
A) hotter than the outer core.
B) the same as the outer core.
C) rock.
D) solid.
Answer: D
You might also like to view...
Which characteristic is not generally true of a starburst galaxy?
A) The observed features that cause us to classify it as a "starburst" must be only temporary phenomena in the galaxy's history. B) The observed features of the starburst are thought to be caused by the presence of a supermassive black hole in the galaxy's center. C) Supernovae occur so frequently that their effects combine to drive a galactic wind that blows material into intergalactic space. D) Its rate of star formation is many times higher than the rate of star formation in the Milky Way.
The person who first explained the blackbody spectrum was __________
Fill in the blank(s) with correct word
Objects the size of the one that exploded over Chelyabinsk (Russia), causing significant damage and injuries to more than 1,000 people, probably hit Earth at least
A) once a century. B) once a year. C) once every 500,000 years. D) once every 100 million years.
Planet Roton has a mass of 4.0 × 1023 kg and a radius of 2.0 × 106 m. With what speed should a space probe be launched from the surface of Roton so as to achieve a maximum distance of 3.0 × 106 m from the center of Roton?
A. 4.2 km/s B. 3.9 km/s C. 3.0 km/s D. 3.4 km/s E. 6.0 km/s