Answer:
<u>Instead of Helium and Hydrogen there are heavier elements in inner planets like Nitrogen and oxygen.</u>
Explanation:
- As the inner planets like Mercury, Venus and Mars and earth have a solid surface which is separated by the Sharpe atmosphere, and their gravity is too low to hold these light gases.
- Uranus is primarily composed of gases and ice of which 83% is hydrogen and 15% helium and rest are trace gases. As in the early composition of the atmosphere, the inner planets like the earth had a solid atmosphere composed of solid silicates elements like magnesium, iron, calcium, and potassium.
- As the earth has a highly unstable atmosphere only carbon, nitrogen and oxygen combined in lightning occur. And planet mercury has no atmosphere thus gravity is too low to hold any gas.
Answer:
During the day, daylight floods our environment every which way, with both immediate and reflected daylight coming to us from wherever we can see. Around evening time, the daylight doesn't flood the environment, as it's dull wherever in the sky that there isn't a state of light at, similar to a star, planet, or the Moon.
Scale is very important with regards to human geography and population because it can interpret geographical information for certain reasons. For instance, if you analyze a geographical information from too small a scale, you could miss out important information that are apparent at smaller scales.
Answer:
b)-2.4% year
Explanation:
The population growth can be calculated by the following equation.
![P(t) = P(0)e^{rt}](https://tex.z-dn.net/?f=P%28t%29%20%3D%20P%280%29e%5E%7Brt%7D)
In which
is the population in t years from now,
is the population in the current year and r(decimal) is the growth rate.
is the Euler number.
The current population of South Korea is 50 million, so ![P(0) = 50,000,000](https://tex.z-dn.net/?f=P%280%29%20%3D%2050%2C000%2C000)
2750 is 2750 - 2019 is 731 years from now. So we have that
. The population is going to be extinct, so
.
So, we can replace the values of
and t in the equation, and see for which growth rate
.
a) 0.012 % year
This is a positive growth rate, which means that the population will not be going extinct. So this is not the alternative
b)-2.4% year
![r = -0.024](https://tex.z-dn.net/?f=r%20%3D%20-0.024)
![P(t) = P(0)e^{rt}](https://tex.z-dn.net/?f=P%28t%29%20%3D%20P%280%29e%5E%7Brt%7D)
![P(731) = 50,000,000e^{-0.024*731} = 1.20](https://tex.z-dn.net/?f=P%28731%29%20%3D%2050%2C000%2C000e%5E%7B-0.024%2A731%7D%20%3D%201.20)
Population of 1 person, basically extinct. This is the correct answer
c)-0.01% year'
![r = -0.001](https://tex.z-dn.net/?f=r%20%3D%20-0.001)
![P(t) = P(0)e^{rt}](https://tex.z-dn.net/?f=P%28t%29%20%3D%20P%280%29e%5E%7Brt%7D)
![P(731) = 50,000,000e^{-0.001*731} = 24,071,366](https://tex.z-dn.net/?f=P%28731%29%20%3D%2050%2C000%2C000e%5E%7B-0.001%2A731%7D%20%3D%2024%2C071%2C366)
Population still at 24 million, it does not goes extinct.
d)-0.012% year
![r = -0.0012](https://tex.z-dn.net/?f=r%20%3D%20-0.0012)
![P(t) = P(0)e^{rt}](https://tex.z-dn.net/?f=P%28t%29%20%3D%20P%280%29e%5E%7Brt%7D)
![P(731) = 50,000,000e^{-0.0012*731} = 20,797,296](https://tex.z-dn.net/?f=P%28731%29%20%3D%2050%2C000%2C000e%5E%7B-0.0012%2A731%7D%20%3D%2020%2C797%2C296)
Population still at almost 21 million, it does not goes extinct.
Answer:
24.4 is the square ROOT of 600