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Cerrena [4.2K]
3 years ago
7

Which of the following statements about agriculture is false?

Geography
2 answers:
Delvig [45]3 years ago
8 0

The successful hybridization of rice crops prevented famine in India in the 1960s.

Answer A.

Alecsey [184]3 years ago
3 0

Answer: A.

Explanation: A.  The successful hybridization of rice crops prevented famine in India in the 1960s.

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Part A Briefly summarize the role of the jovian planets in shaping the orbits of small bodies in the solar system and in influen
Alja [10]

Answer:

Their gravity helps make life possible.

Explanation:

The Jovian planets are also known as gas giants and have had more of an impact on Earth than most Earthlings probably realise. During the formation of the solar system, these planets captured large planetesimals as moons and allowed the inner solar system to form less violently.

The gravitational pull of these massive planets also drew comets laden with ice from the outer reaches of the solar system towards the dry rocky worlds in the center. It was largely due to this slingshot process that Earth received its oceans.

Finally, the Jovian planets protect the inner planets today by deflecting asteroids and comets that might otherwise penetrate into the inner solar system and collide with Earth.

7 0
3 years ago
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
Which statement is true about earths poles?
Fittoniya [83]
Where is statement what we are say
5 0
3 years ago
Who is Jesus and who is God?​
Taya2010 [7]
Jesus and god are the same person
8 0
4 years ago
Read 2 more answers
+ What would happen if the earth rotates in an opposite <br>direction?​
Gnesinka [82]

Answer:

I believe that everything would just be the opposite of what it is now.

Explanation:

Like, seasons would flip (Possibly change positions on the planet), months would also flip, uh, yeah.

5 0
3 years ago
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