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3 years ago

CORRECT ANSWERS ONLY PLEASE AND THANK YOU

Geography

1 answer:

Svet_ta [14]3 years ago

5 0

Answer:

Explanation:

The printing press allowed mass production of books that spread new scientific ideas.

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Which of the following is true about the demographic transition model

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3 years ago

Assume that the Moon is hit by about 25 million micrometeorite impacts each day (this number comes from observations of meteors

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Answer:

3.03 Billion Days or 8.30 Million years

Explanation:

Given,

No. of micrometeorite impacts per day on the Lunar surface = 25000000

Impacts needed to erase a footprint = 20

Area of footprint = 300 cm²

We know that surface area of the Moon = 37.93 Million Km² = $37.93\times 10^{16} cm^{2}$

To find: How long will it take to erase one footprint?

Using the above information,

No. of impacts per cm² per day is

$= \frac{25000000}{37.93\times 10^{16}}$

No. of impacts on area of a foot print (300 cm²) per day will be,

$= \frac{25000000}{37.93\times 10^{16}}\times 300$

$= 6.59\times 10^{-9}$

To erase the footprint there must be 20 impacts on the area of footprint.

Time taken for $6.59\times 10^{-9}$ impacts = 1 Day

Time taken for 1 impact is

$= \frac{1}{6.59\times 10^{-9}} days$

Hence, time taken for 20 impacts will be

$= \frac{1\times20}{6.59\times 10^{-9}} days$

$= 3.03 \times 10^{9} days$

$= \frac{3.03 \times 10^{9}}{365}years$

$= 8.30 \times 10^{6} years$

It would take around 3.03 Billion Days or 8.30 Million years for one of the footprints left by the Apollo astronauts to be erased.

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3 years ago

Why is the inner core solid and the litter core liquid<br>

geniusboy [140]

Answer:

Explanation:

As you go deeper in the Earth both temperature and pressure increases. Although the inner core is very hot, it is solid because it is experiencing very high pressure.

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tankabanditka [31]

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3)Phishing,shopping etc.

Explanation:

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Image problems in telescopes today can be corrected using what type of equipment?

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Changing the lenses?

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