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
Tems11 [23]
4 years ago
6

Which statement about the dark nebulae is true?(A) They can be penetrated only with shorter waves, such as UV and x-ray.(B) They

can be penetrated only with longer wavelengths such as radio and infrared. (C) They block the vast majority of radio waves from our Galaxy.(D) Only one is known to exist.(E) Hydrogen and helium are the chief absorbing and scattering agents.
Physics
1 answer:
TiliK225 [7]4 years ago
8 0

Answer: (B) They can be penetrated only with longer wavelengths such as radio and infrared.

Explanation:

A dark nebula is a type of interstellar cloud with such a high density that it "hides" the light of the background stars.

It should be noted that these nebulae are composed mostly of hydrogen (the star's primary fuel), and the absence of light (in the visible range of the electromagnetic spectrum) is caused by the interstellar solid dust that constitutes the cloud, which is why they are also called absorption nebulae.

However, <u>if powerful telescopes that detect at long wavelengths, such as infrared and X-rays, it is possible to observe through these nebulae and even observe the existence of young stars.</u>

You might be interested in
Connie teaches her children to call adults "sir" and "ma'am" and to say "please" and "thank you." These rituals are known as
Nat2105 [25]
Manners. they are known as manners.
5 0
3 years ago
What had to be invented before we could discover Saturn and Neptune?
Ann [662]

The discovery of Uranus, Neptune, most asteroids, the moons of
any planet other than Earth, Pluto, and all the other dwarf planets,
required the invention and use of telescopes.  Those objects are all
too dim to be seen with a bare naked human eye.

Saturn is bright and plainly visible with your eyes, if you know when
and where to look, and what you're looking at.

4 0
3 years ago
Read 2 more answers
1.) What is the equation for Average Speed?
jok3333 [9.3K]

Answer:

Speed = Distance / Time

Explanation:

here you go :)

4 0
3 years ago
Read 2 more answers
Un observador se halla a 510m. de una pared. entre el observador y la pared, y a igual distancia de ambos, se realiza un disparo
ch4aika [34]

Answer:

a)    t = 0.75 s,  b)  t = 2.25 s

Explanation:

The speed of sound is constant in a material medium

           v = 340 m / s

we can use the relations of uniform motion to find the time

          v = x / t

          t = x / v

In the exercise, the observer's distance to the wall is indicated d = 510 m, it also indicates that the shot is fired at the midpoint

          x = d / 2

       

a) direct sound the distance from the observer to the screen is

           x = 510/2 = 255 m

           t = 255/340

           t = 0.75 s

b) echo sound.

In this case the sound reaches the wall bounces, the distance is

             x = d / 2 + d

             x = 3/2 d

             x = 3/2 510

             x = 765 m

the time is

              t = x / v

              t = 765/340

              t = 2.25 s

5 0
3 years ago
What does soil structure refer to?
Zigmanuir [339]
A this refers to the make up of the soil
6 0
4 years ago
Read 2 more answers
Other questions:
  • What element has 31 protons and 37 neutrons???
    7·2 answers
  • Viewers of Star Trek hear of an antimatter drive on the Starship Enterprise. One possibility for such a futuristic energy source
    6·1 answer
  • A 5.00-kg ball is hanging from a long but very light flexible wire when it is struck by a 1.50-kg stone traveling horizontally t
    12·2 answers
  • If the collision is perfectly elastic, what are the final velocities v1 and v2 of objects 1 and 2? give the velocity v1 of objec
    7·1 answer
  • in 1 second, 2.68x10^16 Na ions arrived at the negative electrode and 3.92x10^16 Cl- ions arrive at the positive electrode what
    5·1 answer
  • A crime suspect fled the scene when police officers entered the building. How far could he run in 10 minutes if he can run 5 mil
    9·1 answer
  • The acceleration due to gravity on Jupiter is 23.1 m/s2, which is about twice the acceleration due to gravity on Neptune.
    10·2 answers
  • Your friend wants to lose weight around the belly. Your friend is planning to do crunches every day to lose the weight, but is n
    15·1 answer
  • HELP ME PLEASE 20 POINTS
    5·1 answer
  • How to convert sin angles with values of 90 degrees, 60, 45, 30, 0 to cos degrees.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!