How do we know that the interior of jupiter is a liquid metallic material?
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Answer: First, astronomers learned about Jupiter's average density, that is 1.34 g/cm3, which is lower than that of Earth. A recorded spectra from Jupiter reveals that it composes of mostly hydrogen and helium
Through the calculations of mathematical models, astronomers can tell that the interior of jupiter is mostly liquid hydrogen. additionally, they can tell that roughly a quarter of the way to the center, the pressure is high enough to "force" the hydrogen into liquid metallic hydrogen
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Phase Angles: A 60.0-?F capacitor is in series with a 100-? resistor connected across an ac source of frequency 120 Hz. What is the phase angle?
A. -12.5° B. +12.5° C. -77.6° D. +77.6° E. 90.0°
How many octaves exist between 40 hertz and 1280 hertz?
A) 5 B) 6 C) 7 D) 8 E) 9
Briefly describe the star-gas-star cycle
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A 3.0-kg block moves up a 40° incline with constant speed under the action of a 26-N force acting up and parallel to the incline. What magnitude force must act up and parallel to the incline for the block to move down the incline at constant velocity?
a. 14 N b. 12 N c. 16 N d. 18 N e. 25 N