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3 years ago

What are the two possible fates of the universe?

2 answers:

7 0

There's two possible fates for the universe, one is called the Big Crunch, where gravity takes over and begins to pull the cosmos back, compressing to one point. Another extreme is the Big Rip, where the expansion of the universe just gets faster until galaxies, stars, planets, atoms and space itself is ripped apart.

MrRa [10]3 years ago

3 0

Answer:

1) The Big Crunch. 2) The Big RIP.

Explanation:

For The Big Crunch is that's where gravity takes. For The Big RIP is where the expansion of the universe just gets faster until galaxies, planets, stars, atoms and space gets ripped apart.

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What factors create a high quality education system

Diano4ka-milaya [45]

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3 years ago

How does soil type differ in different climates?

DIA [1.3K]

The most influential factors include the parent material (the rocks from which thesoil has come), the climate and terrain of the region, as well as the type of plant life and vegetation present, and, of course, human influence. ... These soils but are less leached than the tundra soils.

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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

How does energy from the sun affect the motion of molecules in a solid compared to molecules in a gas?

astraxan [27]

<h2>Right answer: Molecules in a solid move slower than in a gas. </h2>

Matter is composed of molecules, which are always motion, however, the speed of this movement will depend on its state:

-If it is a solid, the movement of the molecules at room temperature is very small. This means, the atoms intertwine forming defined narrow crystal structures.

-In the case of liquids, molecules have more movement, however there is still some union between the atoms of the body, although much less intense than in the solids. This can happen if the temperature of a solid increases, it loses form until the crystalline structure disappears, reaching the liquid state.

-In the gases the movement of the molecules is maximum, it can be said that they are in chaos and show little response to gravity. They move so quickly that they are released from each other and are hugely separated from each other.

Now, the radiation coming from the Sun is transformed into kinetic energy causing the movement of the molecules, then this kinetic energy is transformed to thermal energy (heat). Hence, when there is an increase in temperature (due to the increase in kinetic energy) the speed of the vibration of the molecules increases.

However, these changes are not the same in all the states of matter. In the case of the solid state the molecules move slowly compared to the liquid and gaseous state.

8 0

3 years ago

Explosive eruptions of pyroclastic debris and gases are associated with which type of volcanoes?

dsp73

Perhaps the composite cone volcanoes

6 0

3 years ago