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2 years ago

What's important about the Timjanichka Cucka Hill?

1 answer:

3 0

When humans first inhabited the area 12,000 years ago, Enchanted Rock was seen as a strange structure from a supernatural world.

It creaked, it groaned and it flickered with supposed “ghost fires,” which was enough to make native tribes think the now-beloved dome was haunted and inhabited by the devil himself, according to an article by Texas Parks and Wildlife Magazine.

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Em quantas regiões está dividido o Brasil e quais são elas

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2 years ago

Seafloor spreading is the theory that new ocean crust is formed at __________ boundaries and destroyed at __________ boundaries.

zepelin [54]

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1 year ago

True or False? Earth is the only planet to have life.

goldenfox [79]

False, several other living things have been found on planets such as mars.

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2 years ago

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________ is a result of inherited factors from parent to offspring.

SVETLANKA909090 [29]

Answer:

Genetic variation.

Explanation:

It is caused by genes inherited from parents to offspring. It is a result of genetic information from parents.

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2 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

2 years ago