Sunspots are cooler than the surrounding region of the Sun's surface
Indicate whether the statement is true or false
TRUE
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Descartes' hypothesis of solar system formation was problematic because he did not understand the ____
a. involvement of condensation b. involvement of contraction c. difference in the planets d. involvement of gravity e. gaseous properties of the Sun
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5 sin (?t + ?/3). The phase (in rad) of the motion at t = 2 s is
a. 7?/3 b. ?/3 c. ? d. 5?/3 e. 2?
The graph in the figure shows the electric field strength (not the field lines) as a function of distance from the center for a pair of concentric uniformly charged spheres
Which of the following situations could the graph plausibly represent? (There may be more than one correct choice.) A) a positively charged conducting sphere within another positively charged conducting sphere B) a positively charged conducting sphere within an uncharged conducting sphere C) a solid nonconducting sphere, uniformly charged throughout its volume, inside of a positively charged conducting sphere D) a positively charged nonconducting thin-walled spherical shell inside of a positively charged conducting sphere E) a positively charged nonconducting thin-walled spherical shell inside of another positively charged nonconducting thin-walled spherical shell
The Milky Way:
A) contains less than 50 billion stars. B) stretches across for just around 30,000 light-years. C) is known for being very unique. D) is larger than most other galaxies.