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4 years ago

Which statements about Earth’s atmosphere are correct? Check all that apply. helpppp

Physics

2 answers:

vagabundo [1.1K]4 years ago

7 0

Answer:2,5,6

Explanation:

1) The most abundant gas in atmosphere is Nitrogen .

2) plants make their food from Carbon dioxide in presence of sunlight and give oxygen

3) troposphere is the lowest region of atmosphere. Chunks of rock from space are burnt in Mesosphere (50 to 80 km above earth surface)

4) Stratosphere lies 12 to 50 km above earth surface.

5) the troposphere gets colder the higher you go.

6) The ozone in the stratosphere protects us from ultraviolet radiation.

7) troposphere contains nearly 75% of water vapor of atmosphere and it is not constant

In-s [12.5K]4 years ago

5 0

2, 5, and 6 are the correct answers.

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3 years ago

If a 8.1g ring is heated using 10.0 ), its temperature rises 21.7°C. Calculate the specific

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3 years ago

The graph below show how natural processes and human activities affect climate

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Is it just me or can anyone else not see a graph? (Because I can’t)

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4 years ago

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If the sprinter accelerates at that rate for a distance of 15 m, and then maintains the velocity he has at that point for the re

ahrayia [7]

Answer:

The time for the entire race is 11.39 sec.

Explanation:

Given that,

Distance = 15 m

Remainder distance = 100 m

Suppose A sprinter begins a race with an acceleration of 3.4 m/s².

We need to calculate the time

Using equation of motion

$s=ut+\dfrac{1}{2}at^2$

Put the value in the equation

$15=0+\dfrac{1}{2}\times3.4\times t^2$

$t^2=\dfrac{30}{3.4}$

$t=2.97\ sec$

We need to calculate the final velocity of sprinter

Using equation of motion again

$v=u+at$

Put the value into the formula

$v=0+3.4\times2.97$

$v=10.09\ m/s$

We need to calculate the distance covers by sprinter

$d=100-15=85\ m$

The sprinter need to covers only 85 m.

We need to calculate the time

Using formula of time

$t=\dfrac{d}{v}$

Put the value into the formula

$t'=\dfrac{85}{10.09}$

$t'=8.42\ sec$

We need to calculate the time for the entire race

$t''=t+t'$

Put the value into the formula

$t''=2.97+8.42$

$t''=11.39\ sec$

Hence, The time for the entire race is 11.39 sec.

4 0

3 years ago

Which statements describe nuclear reactions? Check all that apply.

Alexandra [31]

Explanation:

Nuclear reactions are the reactions in which nucleus of an atom changes either by splitting or joining with the nucleus of another atom.

There are two types of nuclear reactions.

Nuclear fission - In this process, large atomic nuclei splits into smaller nuclei.
Nuclear fusion - In this process, two small nuclei combine together to form a large nuclei.

Both nuclear fission and fusion processes involve nuclei of atoms.

For example, $^{0}n + ^{235}_{92}U \rightarrow ^{236}_{92}U \rightarrow ^{144}_{56}Ba + ^{89}_{36}Kr + 3n + 177 MeV$

Thus, we can conclude that statements which are true are as follows.

Nuclear reactions involve the nuclei of atoms.

The products of nuclear reactions are lighter than the reactants.

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3 years ago

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