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3 years ago

Is the following sentence true or false? The rock cycle is produced by forces inside the Earth and at the

Geography

1 answer:

Triss [41]3 years ago

5 0

Answer:

true

Explanation:

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Protostars are difficult to observe because ___________. a. they are surrounded by cocoons of gas and dust. b. they radiate main

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Protostars are difficult to observe because they are surrounded by cocoons of gas and dust.

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3 years ago

Most of the sediment that is compacted and later forms shale bedrock is

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Shale.

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It is composed of silt or clay that has been compacted or squeezed together to form a solid rock.

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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.

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3 years ago

Einstein's theory of general relativity was published in 1916. It became fully accepted by scientists in the 1960s and is curren

HACTEHA [7]

Answer:

C , More evidence needed to be gathered to validate the ideas in the theory.

Explanation:

i just answered it on apex

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3 years ago

Which word best describes Montreal?

Aleonysh [2.5K]

Answer:

A. Multicultural

Explanation:

Montreal is a melting pot of people from all sorts of cultures

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