What were the names of the two rivers that the fertile creascent was between?

Population density can change due to immigration and emigration.<br> true or false?

Andru [333]

Population density can change due to immigration and emigration > True :}

8 0

2 years ago

The oceanic crust is composed of dark igneous rocks called __________; whereas the upper continental crust has an average compos

inysia [295]

Answer:

Basalt, sedimentary rock.

Explanation:

The reason why the continental crust differs from the oceanic crust is much different in its compositions. The continental crust is thin and less dense , is made of sedimentary and metamorphic rocks than the oceanic crust and is made of lighter elements. The tectonic plates move the composition to the rocks.

4 0

3 years ago

In nuclear fission and fusion reactions mass is converted into energy. The average person in US uses around 100,000,000 J of ene

daser333 [38]

Answer:

a) The yearly energy consumption for a US population of 300 million is $3\times 10^{16} J/year$

b) The energy that would be released if a 60 kg person were converted entirely into energy is $5.4\times 10^{18}$ Joules.

c) 180 years would this amount of energy support a population of 300 million.

Explanation:

a) Average energy consumed by single person of US = 100,000,000 J/year

Then 300 million US citizen will consume:

300 million = 300 × 1,000,000 = $3\times 10^8$

The yearly energy consumption for a US population :

$100,000,000 J/year\times 3\times 10^8=3\times 10^{16} J/year$

The yearly energy consumption for a US population of 300 million is $3\times 10^{16} J/year$

b) $E = m\times c^2$

E = Energy from converted mass of m

c = speed of light

Given mass of person = m = 60 kg

$E=60 kg\times (3\times 10^8 m/s)^2 = 5.4\times 10^{18} J$

c) Energy calculated in part (b) = $E=5.4\times 10^{18} J$

The yearly energy consumption for a US population of 300 million in an year = $3\times 10^{16} J/year$

Let the that would be supported by $5.4\times 10^{18}$ Joules of energy be x.

$x\times 3\times 10^{16} J/year=5.4\times 10^{18} J$

$x=\frac{5.4\times 10^{18} J}{3\times 10^{16} J/year}=180 years$

180 years would this amount of energy support a population of 300 million.

4 0

3 years ago

You are at 35 N and 175 W; you move to a new location which is 40 south and 60 west of your present position. What are the coord

evablogger [386]

Answer:

The new coordinates are 5S and 125E

Explanation:

Addition of latitudes:

If they are in the same direction, you just have to add the values.

For example, 5N + 10N = 15N.

You have to be careful that we don't have any latitude higher than 90. So, if the result of your sum is higher than 90, we subtract 180 by the result, and the position is in the other hemisphere.

For example

60N + 40N = 100N

100N is larger than 90, so not possible

Subtracting and changing hemisphere

180 - 100N = 80S

When they are in opposite directions, you can just say that one hemisphere is the positive one, and the other is the negative.

In this problem, i am going to say that the North hemisphere is the positive one and the South the negative.

So, currently at 35N moving 40S. The new position is

$P = 35 - 40 = -5$

Since the result is negative, this just means that we are in the Southern Hemisphere, so 5S

Adittion of Longitudes:

They work just like the latitudes, the difference is that we don't have any longitude higher than 180. So, if we have a result higher than 180, we subtract 360 by this value and change the hemisphere.

In this problem.

175W + 60W = 235, higher than 180, so:

360 - 235 = 125E

5 0

3 years ago

What words can be spelled with the letters b, o, u, t, a?

Colt1911 [192]

Boat
At
Boa
Tub
But
Bat
Tab
Out
Bot
Tuba

8 0

3 years ago