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Anastasy [175]
3 years ago
8

Complete the following sentences:1. The circular but relatively flat portion of the galaxy is the ____________. 2. The first por

tion of the galaxy to form was the ________. 3. A tightly packed group of a few hundred thousand very old stars is a ___________. 4. A __________ stands out in a photo of a galaxy because it shines brightly with light from massive young stars and glowing clouds of gas and dust. 5. Our Milky Way galaxy is a___________ . 6. Stars orbiting in the _______ near the galaxy's center can have orbits highly inclined to the galactic plane.
Geography
1 answer:
larisa [96]3 years ago
3 0

Answer:

1. disk

2.halo

3. globular cluster

4.spiral arm

5. spiral galaxy

6. bulge

Explanation:

1. In Spiral or Lenticular galaxies, the galactic disk is the flat portion that consists of 2 components; the stellar component and the gaseous component. The stellar component consists of the galaxy stars while the gaseous component consists of cool gas and dust.

2. The galactic halo is the first portion of the galaxy to be formed. Formation of halos is caused by increased gravitational effects and the presence of primordial black holes. When baryonic and dark matter merges, halos are formed.

3. A globular cluster is a large compact spherical star cluster, typically of old stars in the outer regions of a galaxy.

4. Spiral arms are region of a large concentration of stars in a spiral galaxy. This large concentration of stars are usually very bright and easily noticeable.

5. The Milky Way galaxy consists of flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge. The spiral arm that I explained above extends from the center of spiral galaxies. This extension makes it resemble a spiral and thus give spiral galaxies their name.

6. The bulge is a large concentration of stars.

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2. A 260 em cylinder container was used to collect an undisturbed soil sample. The container and soil weighed 403 g when dried.
sineoko [7]

Answer:

The Bulk density = 1.3 g/cm³

the porosity of the sample is 132 cm³

Explanation:

Given:

Volume of cylinder = 260 cm³

Mass of container and the soil = 403 g

Mass of the empty container = 65 g

Thus,

The mass of the soil is = 403 - 65 = 338 g  

Now,

The Bulk density = \frac{\textup{Mass}}{\textup{Volume}}

or

The Bulk density = \frac{\textup{338 g}}{\textup{260}}

or

The Bulk density = 1.3 g/cm³

also,

average particle density for mineral soil is usually given as 2.65 g/cm³

i.e the air present in the given soil sample has reduced its density from 2.65 g/cm³ to 1.3 g/cm³

The mass of the whole sample = Volume × Density

= 260 × 2.65

= 689 gm

but,

The actual mass of the dry sample = 338 g

thus,

Mass of air in the sample = 689 - 338 = 351 g

Therefore,

the volume of 351 g soil = \frac{\textup{mass defect of soil}}{\textup{density of soil}}

=  \frac{\textup{351}}{\textup{2.65}}

= 132.45 cm³

so the porosity of the sample is 132 cm³

4 0
4 years ago
There is a photo that is the question
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Most of the world's rain and snow comes from the ecosystem.
Ugo [173]
<span>The answer is Marine</span>
3 0
3 years ago
What is the smallest island in the world
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Is it bishop rock?
cuz thats what google says.
3 0
3 years ago
Read 2 more answers
Two lines extend from point S to create a right angle. The vertical line extends from point S through point R. The horizontal li
Grace [21]

A half-infinite line (also known as a half-line) with one of the two points and is commonly used to represent a ray. The endpoint of a ray is point S. The correct option is B.

<h3>What is a ray?</h3>

A half-infinite line (also known as a half-line) with one of the two points and is commonly used to represent a ray. It is assumed to be infinite.

Given that Two lines extend from point S to create a right angle. The vertical line extends from point S through point R. The horizontal line extends right from point S through point T.

Also, A third line extends right and up from point S through point U. This can be drawn as shown below.

Now, since all the ray starts from point S, therefore, the endpoint of a ray is point S.

Learn more about Ray here:

brainly.com/question/17491571

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2 years ago
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