What feature of the photosphere is evidence for convection in the sun?


Ans: Granules

Physics & Space Science

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RC Circuits: When an initially uncharged capacitor is charged through a 25-k? resistor by a 75-V dc ideal power source, it takes 0.23 ms for the capacitor to reach 50% of its maximum charge? What is the capacitance of this capacitor?

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

Suppose that both the Sun and a distant star cross your meridian at exactly 12:00 noon today. At about what time will the star cross your meridian tomorrow?

A) 11:56 a.m. B) 12:00 noon C) 12:10 p.m. D) 9:00 a.m. E) 3:00 p.m.

Physics & Space Science

Which of the following is thought to explain many of the “exceptions to the rules” of our solar system?

a. the heavy bombardment b. giant impacts c. the frost line d. conservation of angular momentum e. the solar nebula

Physics & Space Science

A 2-kg ball is thrown horizontally at. a speed of 10 m/s. At the same time, a 1-kg ball is dropped from the same height. Ignoring air resistance, which ball hits the ground first?

a. the 2-kg ball b. it's a tie c. the 1-kg ball

Physics & Space Science