Posted on April 27, 2022 (Updated on July 9, 2025)
What does penumbral eclipse mean?
Space & NavigationWhat happens in a penumbral lunar eclipse? A penumbral lunar eclipse occurs when the Sun, Earth, and the Moon are imperfectly aligned. When this happens, the Earth blocks some of the Sun’s light from directly reaching the Moon’s surface and covers all or part of the Moon with the outer part of its shadow, also
Posted on April 27, 2022 (Updated on July 9, 2025)
How many chiral carbons are in Ketopentose?
Space & NavigationThe term ketopentose indicates that the compound is a ketone and that it contains five carbon atoms. How many chiral carbons are present in Xylulose a ketopentose? Rosanoff projection of a ketopentose (D-threo-pentulose, “d-xylulose”) showing the configurations of the two chiral carbon atoms. What is the structure of ketopentose? Definition : A pentose having a
Posted on April 27, 2022 (Updated on July 9, 2025)
Why is the Mobius strip non orientable?
Space & NavigationSince the normal vector didn’t switch sides of the surface, you can see that Möbius strip actually has only one side. For this reason, the Möbius strip is not orientable. Is Möbius strip an orientable surface? The Möbius strip is a non-orientable surface, meaning that within it one cannot consistently distinguish clockwise from counterclockwise turns.
Posted on April 27, 2022 (Updated on July 9, 2025)
Does cosine rule apply to all triangles?
Space & NavigationThe Cosine Rule can be used in any triangle where you are trying to relate all three sides to one angle. If you need to find the length of a side, you need to know the other two sides and the opposite angle. Can you use cosine on non right triangles? The law of cosines
Posted on April 27, 2022 (Updated on July 9, 2025)
How many times does the Earth rotate on its axis in one day and one night?
Space & NavigationYour answer is: The Earth rotates 1 time on its axis in one day and one night.Your answer is: The Earth rotatesEarth rotatesEarth rotates eastward, in prograde motion. As viewed from the north pole star Polaris, Earth turns counterclockwise. The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the
Posted on April 27, 2022 (Updated on July 9, 2025)
Where is a protostar on the HR diagram?
Space & NavigationThe protostar is still rather cool and would appear at the extreme right of the HR diagram if at all. Because the protostar is still contracting, its diameter and hence surface area are quite large so its luminosity may be ~100x what it will be when it reaches the main sequence. Where is protostar located?