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3 years ago

What are the two primary methods by which planets have been found around other stars in our galaxy?

Geography

1 answer:

irina1246 [14]3 years ago

5 0

Answer: The primary two methods by which planet are found around other stars are:

I) Direct images in visible and infrared light.

Explanation: This is viewing the star by seeing itself. This method is very tedious and difficult because of the light made up by the extrasolar planets around the galaxy.

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What discovery caused people to begin racing to California

BARSIC [14]

The discovery of Gold caused people to start rushing to California.

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4 years ago

Read 2 more answers

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

Guess the places ???

andreyandreev [35.5K]

Answer:

City of Conway

Explanation:

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2 years ago

A rocky object that orbits the Earth (it has 8 words-cross puzzle)

barxatty [35]

<span>Asteroid is a rocky object that orbits the Earth.</span>

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3 years ago

How do tectonic plates move? Slide past one another sh Together O All of these are correct Apart

Slav-nsk [51]

Answer:

When oceanic or continental plates slide past each other in opposite directions, or move in the same direction but at different speeds, a transform fault boundary is formed. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault.

Explanation:

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3 years ago