What is the only lasting "cloudmark" for telescopic observers of Jupiter, and what do we know about its past?
What will be an ideal response?
The Great Red Spot has been observed for as long as telescopes had resolution good enough to show it, for over 300 years. It has varied considerably in size, shape, and color over time, but never entirely vanished.
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The primary source of the Sun's energy is:
A) oxidation of carbon in the core. B) gravitational collapse of the helium coreward. C) dark energy. D) the strong force fusing hydrogen into helium. E) the weak force creating energy from uranium decay.
A stable electron orbit cannot exist if its circumference is
A) a single wavelength. B) 2 wavelengths. C) 2.5 wavelengths. D) any of the above E) none of the above
A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the y axis from y = 0 to y = 3.0 m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?
a. 2.0 N b. 5.0 N c. 1.0 N d. 3.6 N e. 3.0 N
The large envelope of comets that encircle the Sun beyond the outer planets is called the ________ cloud.
Fill in the blank(s) with the appropriate word(s).