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3 years ago

1.Which of the following was an effect of the Renaissance?

Geography

2 answers:

umka2103 [35]3 years ago

8 0

Most likely B. More works were published in the vernacular.

Eva8 [605]3 years ago

4 0

I think i go with B i am not totally sure though

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

mestny [16]

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.

6 0

3 years ago

N addition to coal, lead, and petroleum, salt was an important mineral resource. where did salt manufacturing first begin?a.semi

irinina [24]

<span>Salt manufacture has a long history, dating to well over 2700 BCE in China as the earliest documentation. Oklahoma's first commercial salt manufacturing occurred in the Cherokee land Indian Territory in 1815 by Major William Lovely, a Cherokee agent.</span>

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Answer:

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3 years ago

How does air pressure change as altitude increases in the atmosphere?

LUCKY_DIMON [66]

<span>The higher the altitude, the lower the atmospheric pressure. Lower pressure in turn causes water to evaporate more quickly, and water actually boils at a lower temperature. The percentage of oxygen in the air at two miles (3.2 km.) is the same as at sea level (21%). However, the air pressure is 30% lower at the higher altitude due to the fact that the atmosphere is less dense--that is, the air molecules are farther apart. The important effect of this decrease in pressure is this: in a given volume of air, there are fewer molecules present. This is really just another way of saying that the pressure is lower. This is called Boyle's law.</span>

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