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3 years ago

If you compress geologic time into a single year, how much time has elapsed since Columbus arrived in the New World?

Geography

1 answer:

Readme [11.4K]3 years ago

5 0

Answer: 3.6 seconds

Explanation: Geologic time is a way of measuring time based on events in the history of the Earth. If we compress this into one year, a single geologic year equals 4.6 billion years because the planet was formed 4.6 billion years ago.

Columbus arrived in the New World in August 1492, 528 years ago.

If 4.6 billion years = 1 year in geologic time,

528 years = 528 X $\frac{1X365daysX24hoursX60minutesX60seconds}{4600000000}$

=3.6 seconds

(I broke the year down into seconds by breaking it down into days, then hours, minutes and seconds because the value is very small)

So, if we compress geologic time into a single year, only 3.6 seconds have elapsed since Columbus arrived in the New World

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3 years ago

PLEASE HELP What is the evidence of earth being made of matter that is constantly changing?

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HERE IS YOUR ANSWER BRO

I HOPE IT WILL HELP YOU.

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The Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 11,700 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.

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- Intergovernmental Panel on Climate Change

The current warming trend is of particular significance because most of it is extremely likely (greater than 95 percent probability) to be the result of human activity since the mid-20th century and proceeding at a rate that is unprecedented over decades to millennia.1

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The planet's average surface temperature has risen about 1.62 degrees Fahrenheit (0.9 degrees Celsius) since the late 19th century, a change driven largely by increased carbon dioxide and other human-made emissions into the atmosphere.4 Most of the warming occurred in the past 35 years, with the six warmest years on record taking place since 2014. Not only was 2016 the warmest year on record, but eight of the 12 months that make up the year — from January through September, with the exception of June — were the warmest on record for those respective months.

THANK YOU .......

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3 years ago

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mamaluj [8]

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3 years ago

On your most recent mountain climbing adventure, you recorded a barometric pressure of 1000 mb at the base of a mountain. When y

Lera25 [3.4K]

Answer:

B) 5000 meters

Explanation:

Barometric pressure depends on the height, as of course there is more air above an area as the air column is higher. Usually, it is defined as a exponential relation which comes as follows:

1. $P=P_{0}*e^{(\alpha*h) }$

Being:

P the pressure at the determined height. In our case, would be the 950 mb at the summit

$P_{0}$ the initial pressure. In our case, would be the 1000 mb at the base.

α a constant value, which is usually found on literature as $-1.19*10^{-5} m^{-1}$ . It depends on the air density and the estimations on how much air do we have above.

h is the height which we want to determine the pressure at

Of course, we need to clear the height on the previous equation, so we need to seek help on the natural logarythm. First of all, let's clear the exponential expression from 1 :

2. $\frac{P}{P_{0}}=e^{\alpha*h}$

After that, apply the natural logarythm at both sides of the equation 2:

3. $ln(\frac{P}{P_{0}})=ln(e^{\alpha *h})$

Computing 3:

4. $ln(\frac{P}{P_{0}})=\alpha*h$

And clearing h in 4:

5. $\frac{ln\frac{P}{P_{0}} }{\alpha } =h$

Replacing known values in 5. Please have in mind, when replacing, both of the pressure values need to be in the same unit (in this case, millibars)

$h=\frac{ln\frac{950 mb}{1000 mb} }{-1,19*10^{-5} m^{-1}}=4310,36 m$

As this is an estimate, we would say that mountain is approximately 5000 m. Quite far from the result, maybe the source has different α constant values.

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3 years ago