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
Semmy [17]
3 years ago
11

The spectra of most stars are dark-line spectra because ________.

Physics
1 answer:
pav-90 [236]3 years ago
5 0
Because dark line spectra result from passing white light through ionized gasses and plasmas, which is what the atmosphere of stars are made of.  These frequencies are scattered by the star's atmosphere as it leaves the surface (photosphere) of the star, and don't make it to earth.
You might be interested in
A device used to measure the atmospheric pressure is the barometer. true false
Angelina_Jolie [31]
True, I just learned this a week ago. Is this for Chemistry?
3 0
2 years ago
Most street lights are made from one or two elements mercury or sodium. Explain why astronomers preferred that cities you sodium
lora16 [44]
Mercury is very harmful to the average human being. the mercury can easily be released from the lamp if the lamp is knocked over and broken. mercury is also harmful if inhaled. sodium on the other hand is not harmful in any way.
4 0
2 years ago
On a winter day with a temperature of -10°C, 500g of snow (water ice) is brought inside where the temperature is 18 °C. The snow
Serjik [45]

Answer:

Explanation:

Mass of ice m = 500g = .5 kg

Heat required to raise the temperature of ice by 10 degree

= mass of ice x specific heat of ice x change in temperature

= .5 x 2093 x 10 J

10465 J

Heat required to melt the ice

= mass of ice x latent heat

0.5 x 334 x 10³ J

167000 J

Heat required to raise its temperature to 18 degree

= mass x specific heat of water x rise in temperature

= .5 x 4182 x 18

=37638 J

Total heat

=10465 +167000+ 37638

=215103 J

7 0
3 years ago
Which planet moves the fastest and which planet moves slowest? a, b, c, d, e, or f. Explain
Alisiya [41]
D is the point where the planet moves the fastest. This is because it is in the perihelion, where the planet is moving at it’s fastest pace
6 0
1 year ago
Anna is drinking a glass of water in her kitchen. The water is too warm for Anna so she decides to make it colder by adding ice.
Makovka662 [10]

Answer:

D: Heat from the water moves into the ice

6 0
2 years ago
Read 2 more answers
Other questions:
  • A student pulls a box across a horizontal floor at a constant speed of 4.0 meters per second by exerting a constant horizontal f
    10·2 answers
  • Which type of nuclear decay emits two protons and two neutrons?
    10·1 answer
  • If you dropped a ball from a height of 10 m and measured its distance to the ground every 0.1 s, what would the graph of positio
    8·1 answer
  • B. Calculate the rock's gravitational potential energy at 50 m, 20 m, 1 m, and om high. Put the
    13·1 answer
  • A balloon contains helium gas. Which applies to the volume of the gas in the balloon when pressure is increased at constant temp
    12·1 answer
  • An object has an acceleration of 6.0 m/s/s. If the net force acting upon this object were tripled , then its new acceleration wo
    7·1 answer
  • . Mass 1 has a momentum of 20 kg*m/s. Mass 2 has a momentum of 50 kg*m/s.
    12·1 answer
  • A car speeds up from 3 m/s to 10 m/s in 8 s. How far does the car travel while doing this? 2. A
    7·1 answer
  • Name six simple machines. Give an example of each machine​
    11·2 answers
  • Help me for physics please
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!