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ad-work [718]
2 years ago
14

Why does the spectroscopic parallax method only work for main sequence stars?.

Physics
1 answer:
Brums [2.3K]2 years ago
5 0

Answer:

Only main sequence stars have a well-defined relationship between spectral type and luminosity.

Explanation:

Low-mass stars have much longer lifetimes than high-mass stars.

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The Periodic Table Question 3 of 10 Based on the trend in valence electrons across periods for main-group elements, how many val
katen-ka-za [31]

Answer:

B. 7

Explanation:

Fluorine has 7 valence electrons in its orbitals.

The valence electrons are electrons in the outermost shell of an atom. Every element has a certain amount of valence electrons.

  • Fluorine belongs to the 7 - group on the periodic table.
  • Every element in this group has 7 electrons in their outermost shell.
  • The elements in the group are called halogens.
  • Other elements in this group are fluorine, chlorine, bromine, iodine and astatine.
5 0
3 years ago
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What is time and speed and acceleration
Andre45 [30]

Answer:

Acceleration is the rate of change of velocity with time.Acceleration occurs anytime an object's speed increases or decreases, or it changes direction. Much like velocity, there are two kinds of acceleration: average and instantaneous. Average acceleration is determined over a "long" time interval.

Explanation:

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7 0
3 years ago
Placed exactly between two oppositely charged point charges, a test charge (the
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Zero maximum force (N) or field strength (N/C). ... minimum /maximum field strength.
6 0
3 years ago
Why am i not tall? <br><br> why am i not tall? <br> why am i not tall?
ryzh [129]

It might be because of you genetics.Some families are small so their children get the genetics and that makes them small.For example I'm tall and im still young i got it from my dad's side of the family.But something that I think will help you be tall is playing basketball because if you see the players are very tall because when they want to dung the ball in the hoop they stretch.So maybe if you play basketball exercise  eat healthy it might work.

Hope this helps =D

3 0
3 years ago
Water evaporates off lakes. Winds blow across the planet. Where does the energy come from for these and other weather processes?
Otrada [13]

Answer:

B. Solar energy

Explanation:

The water cycle is driven primarily by the energy from the sun. This solar energy drives the cycle by evaporating water from the oceans, lakes, rivers, and even the soil. Other water moves from plants to the atmosphere through the process of transpiration.

8 0
4 years ago
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