The terrestrial planet with the oldest surface is ____________________
Fill in the blank(s) with correct word
Mercury
You might also like to view...
Exclusion Principle: According to the quantum mechanical model of the hydrogen atom, if the principal quantum number is n, how many different orbital angular momentum quantum numbers are permitted?
A. n/2 B. n C. 2n D. 3n E. 4n
In what geometric way can we determine the absolute distances to the planets?
What will be an ideal response?
Suppose you look at a detailed spectrum of visible light from some object. How can you decide whether it is an emission line spectrum or an absorption line spectrum?
A) An emission line spectrum consists of bright lines on a dark background, whereas an absorption line spectrum consists of dark lines on a rainbow background. B) An emission line spectrum consists of a long bright line, whereas an absorption line spectrum consists of a long dark line. C) The only way to decide is to make a graph of the intensity of the light at every wavelength, and then analyze the graph carefully. D) The emission line spectrum is produced by electrons jumping up in energy level, whereas the absorption line spectrum is produced by electrons jumping down in energy level.
What happens after the helium flash in the core of a star?
A) The core quickly heats up and expands as helium fusion begins all at once throughout the core. B) The star breaks apart in a violent explosion. C) The core suddenly contracts because the helium disappears after being fused. D) The core stops fusing helium. E) The star starts to fuse helium in a shell outside the core.