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ikadub [295]
2 years ago
12

3. The atmospheres of Mars and Venus are mostly carbon dioxide. Earth'satmosphere contains only a fraction of a percent of carbo

n dioxide. Whyis Earth's atmosphere so different from those of Mars and Venus?
Physics
1 answer:
maria [59]2 years ago
3 0

Answer:

Earth's atmosphere is a mixture of nitrogen (79%), oxygen (20%), and a small fraction of carbon dioxide, water vapours and other gases. However, the atmospheres on Venus and Mars mainly consist of carbon dioxide.

Explanation:

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An object weighs 32 newtons. What is its mass if a gravitometer indicates that g = 8.25 m/s?
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Explanation:

weight=mass×g

32=mass×8.25

mass=

\frac{128}{33}  = 3.878kg

8 0
3 years ago
During the first stage of a multistage rocket, a satellite is:
lianna [129]
B. sent through the atmosphere 

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What did Newton's book Mathematical Principles of Natural Philosophy argue about the role of mathematics in understanding the na
quester [9]
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3 years ago
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Help me &lt;3 please <br> Thank you :)
NARA [144]

Answer:

11,890

Explanation:

First we need to know what is considered a significant figure.

A significant figure is a value that is not a zero at the start OR end of a value.

Which means, the 0 in the value of 90 or 0.363 are not considered a significant figure.

The 0 in the value of 3056 is considered a significant figure.

So from the table, we can deduce:

0.275 has 3 significant figures

750 has 2 significant figures

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has 3 significant figures.

11,890 has 4 significant figures.

320,050 has 5 significant figures.

So from the above, we can already see the answer.

4 0
2 years ago
How many photons are absorbed during the dental x-ray?
MariettaO [177]
<span>E=hc/wav. len
E = (6.62 x 10^-34 x 3 x 10^8)/0.0275 x 10^-9
E = 7.22182 x 10^-15 J
To convert to eV divide by 1.6 x 10^-19
E = 7.22182 x 10^-15/1.6 x 10^-19 eV
E =45.36 x 10^3 eV
Th energy, E, of a single x-ray photon in eV is = 45.36keV.

Number of photons, n = total energy/ energy of photon
n = 3.85 x 10^-6/7.22182 x 10^-15
n = 5.33 x 10^8 photons </span>
8 0
3 years ago
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