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Ganezh [65]
3 years ago
8

Minerals form from magma in predictable patterns in a process known as 

Geography
1 answer:
babymother [125]3 years ago
3 0
It should be A! Bowen's reaction series where minerals form from magma in predictable patterns! (:
I hope all is well, and you pass! Good luck, rockstar! (:
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Places on or near the Equator receive about 12 hours of daylight in June. Approximately how many hours of daylight do those same
Natasha2012 [34]

Answer:

B) 12 hours of daylight.

Explanation:

B) 12 hours of daylight.

In near the equator we experience 12 hours of daylight as the equator is situated exactly the halfway in between the two poles. The North pole experiences  long daylight in the months, when the North Pole is tilted towards the Sun and shorter daylight when the pole tilted away from the Sun. The reverse is true for the Southern Poles. But this wouldn't have any effects in daylight on the equator.

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3 years ago
Which of the following titles would accurately label the chart above? A. Social dilemmas B. Political conflicts C. Economic down
Ivahew [28]

no one would be able to help you because we can not see the chart


5 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
3 years ago
A tornado watch is issued by the National Weather Service after a tornado has been sighted in an area. True False
devlian [24]

Answer:

False

Explanation:

A tornado watch is issued when the conditions are ideal for a tornado to form and covers a broad region. Tornado warnings are when a tornado has been spotted or appears on the radar.

8 0
2 years ago
How do tress produce fruit
3241004551 [841]
A fruit tree is a tree which bears fruitthat is consumed or used by humans and some animals — all trees that are flowering plants produce fruit, which are the ripened ovaries of flowers containing one or more seeds. In horticultural usage, the term 'fruit tree' is limited to those that provide fruit for human food.
8 0
3 years ago
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