The highest atmospheric layer in the Sun is the _______

a. photosphere b. corona
c. chromosphere d. prominence


b

Physics & Space Science

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The pressure exerted by a gas is the result of

a. the Bernoulli effect. b. molecular collisions. c. Pascal's principle. d. the ideal gas law. e. none of the above.

Physics & Space Science

The base SI unit of length is

A) millimeter. B) centimeter. C) meter. D) kilometer. E) megameter.

Physics & Space Science

A hydrogen atom is in the 6h state. What is the principal quantum number

A) 0 B) 3 C) 5 D) 6 E) 7

Physics & Space Science

What is this galaxy doing that keeps it from being idle?

A: The black hole at the center of the disk is sucking in the stars in the disk, which is gradually disappearing. B: It is fragmenting into different irregular parts as the universe evolves. C: It is oscillating between compressed and rarefied states, changing by a factor of two in size every million years. D: Stars are forming in the spiral arms and the disk is rotating. E: The galaxy evaporates quickly so that it will only be around for another million years.

Physics & Space Science