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3 years ago

Please help! ASAP Thanks <3

Chemistry

1 answer:

EleoNora [17]3 years ago

5 0

Greenhouse gases trap energy in the atmosphere.

Explanation:

Greenhouses gases trap the radiation, especially long infrared wavelengths, that emanate from the earth's surface after solar radiation hits the earth’s surface. These infrared wavelengths are electromagnetic radiation that are significant in heat transfer. Mostly a higher percentage of this radiation from the earth’s surface escapes into space. Trapping this radiation in the atmosphere causes warming of the atmosphere - a phenomenon called greenhouse effect. This is why an increase in greenhouse gases causes an increase in global temperatures and subsequently drives climate change.

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The noun field has several meanings. You have learned one meaning. Give two other meanings for field.

AlekseyPX

Answer:

an open area, one typically with crops. a particular branch of a study or interest.

Explanation:

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3 years ago

A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00. Assuming there was no Pb-206 present when the samp

azamat

Answer:

$Age=2.52*10^9 years$

Explanation:

To determine the age, we need to know how much U have become Pb, so first we have to calculate the Pb moles present in a sample:

$n_{Pb}=\frac{0.337g}{206g/mol}=0.00164 mol$

$n_{U}=\frac{1 g}{238g/mol}=0.0042 mol$

The percentage of U degradation:

$P=\frac{n_{Pb}}{n_{Pb}+n_{U}}$

$P=\frac{0.00164}{0.00164+0.0042}=0.28$

Assuming that the life time is linear:

$Age=\frac{4.5*10^9 years}{0.5 life time}*0.28 life time$

$Age=2.52*10^9 years$

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4 years ago

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It will help to determine the motion,direction and energy in a work of art

spayn [35]

Answer:

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3 years ago

Express 1340000 in scientific notation

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1.34*10^6
Move the decimal 6 times to the left, it is a number 1-10

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the answer is USA and Russia

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