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3 years ago

5

A geographic resource containing map collection is an

2 answers:

Radda [10]3 years ago

6 0

The answer to this would be B Altas

garik1379 [7]3 years ago

3 0

A geographic resource containing map collection is an atlas. Answer: B) or the second option.

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Is India an LEDC or an MEDC????

ryzh [129]

India is an LEDC (<span>less economically developed country). </span>
<span>It's due to population explosion, illiteracy, corruption ..

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7 0

3 years ago

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Why do you hear sound/static from radio waves?

scoray [572]

Answer:

Radio noise is a combination of natural electromagnetic atmospheric noise created by electrical processes in the atmosphere like lightning, manmade radio frequency interference from other electrical devices picked up by the receiver's antenna, and thermal noise present in the receiver input.

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4 years ago

If I measure the recession velocities of 2 galaxies and galaxy A has a velocity twice that of galaxy B, how far away is B if A i

alexdok [17]

Answer: 100Mpc

Explanation:

Hubble deduced that the farther the galaxy is, the more redshifted it is in its spectrum, and noted that all galaxies are "moving away from each other with a speed that increases with distance", and enunciated the now called Hubble–Lemaître Law.

This is mathematically expressed as:

$V=H_{o}D$ (1)

Where:

$V$ is the approximate recession velocity of the galaxy

$H_{o}$ is the Hubble constant

$D$ is the distance

Now, we have two galaxies A and B ande we know the following:

Galaxy A has a velocity twice that of galaxy B

$V_{A}=2V_{B}$ (2)

Galaxy A is 200 Mpc away

$D_{A}=200Mpc$ (3)

According to Hubble Law:

$V_{A}=H_{o}D_{A}$ (4)

$V_{A}=H_{o}200Mpc$ (5)

Substituting (2) in (5):

$2V_{B}=H_{o}200Mpc$ (6)

$V_{B}=\frac{H_{o}200Mpc}{2}$ (7)

$V_{B}=H_{o}100Mpc$ (8)

If $V_{B}=H_{o}D_{B}$ (9)

$D_{B}=\frac{V_{B}}{H_{o}}$ (10)

Substituting (8) in (11):

$D_{B}=\frac{H_{o}100Mpc}{H_{o}}$ (11)

Finally:

$D_{B}=100Mpc$

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3 years ago

maks197457 [2]

Answer: I Beleive lighter layers are on top but I’m not sure

Explanation:

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3 years ago

What is the secong layer of the earth?

liubo4ka [24]

The second layer<span> of the </span>earth<span> is just below the crust

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4 years ago

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