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iogann1982 [59]
4 years ago
13

What historical event in medieval history led to European interest in trade with the Middle East?

Geography
1 answer:
tangare [24]4 years ago
4 0
The historical event in the medieval period that led to European interest in trade with the Middle East was the European Crusades. The correct option among all the options that are given in the question is the first option or option "A". I hope that the answer has come to your help.
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Rock transfers heat rapidly.<br> True<br> False
bazaltina [42]
Rock transfers heat rapidly would be true.
7 0
3 years ago
Read 2 more answers
Analysis of a rock sample that it contains 6.25% of its original uranium-235. How old is the rock? How do you know?
Andrews [41]

Answer:

The age of the rock = 2800.6 million years = 2.8 billion years.

A simple method of analysis similar to Carbon dating is used to obtain the required age of the rock. Radioactive substances decay according to first order reaction kinetics. So, plugging all the required parameters into the general equation for amount of substance left in a first order decay gives us the age of the rock.

Explanation:

Half life of Uranium-235 = 700 million years (from literature)

The decay of radioactive substances follow first order reaction kinetics.

The general equation is given as

A(t) = A₀ e⁻ᵏᵗ

A(t) = Amount of radioactive substance left after a particular time = 6.25%

A₀ = initial amount of radioactive substance = 100%

t = time that has passed since the beginning = age of the rock = ?

k = decay constant

The decay constant is related to the half life (T) through the relation,

k = (In 2)/T

k = (0.693/700) = 0.00099 /million years

A(t) = A₀ e⁻ᵏᵗ

6.25 = 100 e⁻ᵏᵗ

0.0625 = e⁻ᵏᵗ

In e⁻ᵏᵗ = In 0.0625 = -2.7726

-kt = - 2.7726

t = (2.7726/0.00099) = 2800.6 million years

t = 2.8 billion years.

Hope this Helps!!!

7 0
4 years ago
What type of agricultural practices are used in syria and how does climate affect it?
Vlad [161]

Answer:

Agricultural Practices: Pumping from rivers and flood irrigation.

How the climate affects it: During summer, the climate is dry and hot. During the winter, it's cold. Therefore, the rivers could freeze, or evaporate

Explanation:

Agricultural Practices: In Syria, the main system of irrigation is pumping from rivers and flood irrigation. In these areas, several irrigated crops are cultivated, such as the strategic crops of cotton, wheat and sugar beet. The fruit trees and early vegetables are also planted as in the Syrian coast.

How the climate affects it: The climate in Syria is dry and hot in summer and cold in winter. ... The average maximum summer temperatures in inland areas vary between 33°C and 40°C, with peaks that sometimes exceed 45°C, while the average minimum winter temperatures are around 0°C.

6 0
3 years ago
What is a Zone of aeration
aev [14]

Answer:

A portion of the lithosphere in which the functional interstices of permeable rock or earth are not filled by water under hydrostatic pressure.

In your own words::

Well’s use is permanently discontinued or if it is in a condition that makes it uneconomic to repair.

Explanation:

hope this helps </3

4 0
3 years ago
Describing five effects of glaciers on both animal and human life.
Stella [2.4K]

Answer:

How do glaciers affect animals?

Their melting water flows into the soil which affects vegetation which acts as food for animals at lower altitudes, some of which are prey for other animals and so on. ... As glaciers melt large deposits of sediment are deposited in valleys below. This affects the local land and rivers and their existing ecosystems.

5 0
3 years ago
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