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
Dominik [7]
3 years ago
7

How are the spiral arms of the milky way detected?

Physics
1 answer:
Step2247 [10]3 years ago
6 0
The spiral structure emerges when galactic clusters (open), H II regions and O & B type stars (young stars) are used as tracers. We know this to be true as other pinwheel galaxies exhibit the same patterns across these tracers as in the milky way.
You might be interested in
?????Help please?????
Sindrei [870]

The correct selections are C, C, B, D, A, B, and A .

6 0
3 years ago
Dust particles in air have a typical mass of 5.0 x 10-16 kg. They undergo irregular motion due to collisions with air molecules.
Mars2501 [29]

Answer:

Rms speed of the particle will be  38.68\times 10^8m/sec

Explanation:

We have given mass of the air particle m=5\times 10^{-16}kg

Gas constant R = 8.314 J/mol-K

Temperature is given T = 27^{\circ}C=273+27=300K

We have to find the root mean square speed of the particle

Which is given by v_{rms}=\sqrt{\frac{3RT}{m}}=\sqrt{\frac{3\times 8.314\times 300}{5\times 10^{-16}}}=38.68\times 10^8m/sec

So rms speed of the particle will be 38.68\times 10^8m/sec

5 0
3 years ago
A book weighing 2 Newtons is at rest on a table. The net force on the book is zero.
natta225 [31]

Answer: I think its True

7 0
2 years ago
The length of daylight on the moon is about __________.
Lyrx [107]
<span>The length of daylight on the moon is about 29.5 days.</span>

From the earliest days, the Moon has been there in the Solar System and there has never been a period when we couldn't gaze upward in the night sky and either observe the Moon hanging there, or realize that it would be back the precise one night from now (i.e. a New Moon).

 A day on the Moon keeps going as long as 29.5 Earth days. We can say that it would take 29.5 days for the Sun to move the distance over the sky and come back to its unique position once more.

3 0
3 years ago
Read 2 more answers
Explain why viscosity is classified as a physical property
dalvyx [7]

Answer:

Copper's composition does not change as its shape changes, hence it is a physical feature.

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • Two very large parallel sheets a distance d apart have their centers directly opposite each other. The sheets carry equal but op
    9·2 answers
  • Longitudinal waves transfer energy ___________ to the direction of the wave motion.
    11·2 answers
  • You are driving your small, fuel-efficient car when you have a head-on collision with a big, fuel-efficient truck that is three
    15·1 answer
  • A plastic rod that has been charged to -15.0nC touches a metal sphere. Afterward, the rod's charge is -10.0nC. How many charged
    10·1 answer
  • A glass of water sitting in direct sunlight evaporates over time. Explain this phase change in terms of the types of heat transf
    7·2 answers
  • Difference between metals and nonmetals​
    10·1 answer
  • A 1,800 kg car is parked on a road that has an elevation level of 7°. Suppose the coefficient of static friction is .65. What is
    6·1 answer
  • Define malleability?<br>​
    15·1 answer
  • Which best describes the relationship between energy and entropy in the universe? for entropy to increase, energy must be added.
    7·1 answer
  • A grindstone increases in angular speed from 4.00 rad/s to 12.00rad/s in 4.00 s. Through what angle does it turn during that tim
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!