1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zlopas [31]
4 years ago
15

Everything we know about stars comes from studying their _____.

Physics
2 answers:
rusak2 [61]4 years ago
8 0

Everything we know about stars comes from studying their radiation/light. By measuring the wavelength or frequency of light coming from objects in the universe, we can learn something about their nature.  Starts emit a range of wavelengths. The frequency of light is directly related to its color, so it follows that stars have different colors because they have different peak wavelengths of light.

denis-greek [22]4 years ago
5 0
Light / Radiation. The light radiation defines its color. Thermal radiation for its temperature and the overall appearance of the wavelengths the star emits gives off the info from where astronomers and scientist are able to build up knowledge on the age and current state of the stars

You might be interested in
A 75 g, 30 cm long rod hangs vertically on a friction less, horizontal axel passing through the center. A 10 g ball of clay trav
kotegsom [21]
Angular momentum is conserved, just before the clay hits and just after; 
<span>mv(L/2) = Iw </span>

<span>I is the combined moment of inertia of the rod, (1/12)ML^2 , and the clay at the tip, m(L/2)^2 ; </span>
<span>I = [(1/12)ML^2 + m(L/2)^2] </span>

<span>Immediately after the collision the kinetic energy of rod + clay swings the rod up so the clay rises to a height "h" above its lowest point, giving it potential energy, mgh. From energy conservation in this phase of the problem; </span>
<span>(1/2)Iw^2 = mgh </span>

<span>Use the "w" found in the conservation of momentum above; and solve for "h" </span>
<span>h = mv^2L^2/8gI </span>

<span>Next, get the angle by noting it is related to "h" as; </span>
<span>h = (L/2) - (L/2)Cos() </span>

<span>So finally </span>
<span>Cos() = 1- 2h/L = 1 - mv^2L/4gI </span>

<span>m=mass of clay </span>
<span>M=mass of rod </span>
<span>L=length of rod </span>
<span>v=velocity of clay</span>
7 0
3 years ago
Your pulse is caused by pressure of the blood on the artery wall, and it corresponds to your heart beat.
solong [7]

weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee true eeeeeeeeeeeeeeeeeeeee

8 0
3 years ago
Read 2 more answers
Car moves 5km East,3km south,2km West, 1km north find displacement<br>(please show me the way)​
ddd [48]

Answer:

3.605551275463989

Explanation:

solve using Pythagorean theorem

4 0
3 years ago
Read 2 more answers
In cats, short hair is dominant and long hair is recessive. If a cat has the genotype of hh, what type of hair will it have?
raketka [301]

Answer:

long hair

Explanation:

long hair = hh

short hair= HH

and medium= Hh

8 0
3 years ago
Hi friends any lover mates be mine wannt​
Hunter-Best [27]

Answer:

um how about no.. this is not the site for what you're looking for...

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • The specific heat of copper is 0.39 j/g*degrees celcius how much heat is needed to raise the temperature of 1000.0 g of copper f
    10·1 answer
  • If you were to drop an egg on concrete would it crack it
    6·2 answers
  • A sample neon gas has its volume tripled and its temperature held constant. What will be the new pressure relative to the initia
    5·1 answer
  • A woman on a motorcycle moving uniformly at a rate of 20 m/s passes a truck at rest. At the instant the motorcycle passes the tr
    13·1 answer
  • Calculate the mean free path of air molecules at a pressure of 7.00×10^−13 atm and a temperature of 303 K . (This pressure is re
    6·1 answer
  • What does balanced and unbalanced forces have to do with newtons laws of motion
    10·1 answer
  • How much work is done to move 3c of charge through a potential difference of 1.5v
    11·1 answer
  • Your total calorie _____ is an estimation of how many calories you burn when you exert yourself. A.Moderate B.Conditions C.Expen
    7·1 answer
  • State three factors that determine the strength of electromagnetic​
    14·2 answers
  • a piston has an external pressure of 8.00 atmatm . how much work has been done in joules if the cylinder goes from a volume of 0
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!