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Anon25 [30]
3 years ago
15

Which are statements that are true about ecosystems? Hunters have a part in balancing the earth's ecosystems. In a healthy ecosy

stem, the removal of one organism will have little effect on the rest of the ecosystem. The sun is the primary source of energy in an ecosystem. Your backyard is an ecosystem. The health of an ecosystem is sometimes improved by human activities. Producers return nutrients to the soil.
Geography
2 answers:
Eddi Din [679]3 years ago
8 0

Answer:

Your backyard is an ecosystem, Producers return nutrients to the soil, and The sun is the primary source of energy in an ecosystem.

Explanation:

this is the most common answers i could find

Annette [7]3 years ago
3 0

Answer:

i think it might be all of them?

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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
Que es un continente
algol13
Se considera como continente a una gran extensión de tierra que se diferencia de otras menores o sumergidas por conceptos geográficos, como son los océanos; y culturales, como la etnografía.
8 0
3 years ago
Read 2 more answers
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