The rock layers that the scientists determined had originally contained 120 kg of the radioactive materials were 10 million years old. Thus, the correct answer is option A.
What is a radioactive element?Radioactive elements are unstable atomic nuclei that undergo radioactive decay to form stable nuclei due to the presence of excess nuclear charge within them. The neutron to proton ratio can be used to estimate the stability of an element's nuclei.
Stable nuclei with atomic numbers up to Z= 20 have an equal number of protons and neutrons. The repulsion forces between protons increase as the atomic number increases.
The radioactive element content of granite, rhyolite, and tuff is comparable. The very coarse-grained granitic rock known as pegmatite contains a high concentration of radioactive minerals.
Therefore, the rock layers scientists determined that the samples had originally contained 120 kg of the radioactive materials were 10 million years old.
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What do maquiladoras offer that attract industries to move south into Mexico?
Question 8 options:
a) Lower wages, lower transportation costs, lower environmental restrictions, no tariffs
b) Higher quality goods, more freedom, closer to raw materials
c) Better skilled labor, right-to-work laws
d) More environmentally friendly, cleaner plants, labor-intensive
Answer:
a) Lower wages, lower transportation costs, lower environmental restrictions, no tariffs
Explanation:
A maquiladora is a corporation that permits manufacturers to be mostly tax and import free. These plants take raw ingredients, construct, produce, or prepare them, and then export the finished good.
Select the correct answer.
Answer:
your answer is B
How does the author support the main idea? Use evidence from the text to support your answer. Commonlit: THE FIRST TIME JOHN LEWIS AND I INTEGRATED THE BUSES
The author supported the central idea by illustrating the choice that Lewis took to tackle racism.
What is a central idea?It should be noted that a central idea simply means the man idea that can be found in a literary work.
In this case, the main idea is about the black students who protested against racial segregation.
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Which term refers to a group of industries clustering for a mutual benefit?
Question 6 options:
a) Land
b) Agglomeration
c) Labor
d) Transportation
PLEASE HELP WILL MARK BRAINLIEST
Using complete sentences, identify and explain two causes of water pollution, two causes of air pollution, and the effects of both in South and Southeast Asia. PLEASE MAKE THE ANSWER SCHOOL APPROPRIATE
Answer:One of the major environmental concerns in South and Southeast Asia is pollution. Water pollution in the region is caused by industrial waste and untreated sewage. Industrial waste often travels downstream and affects the water supplies in cities and farms. Cities often dump sewage into rivers without treating and cleaning the water. The untreated water contains bacteria or parasites. People can become very sick when they drink the polluted water or use it to grow crops. People may end up with severe diseases or long-term health conditions. Air pollution is caused by slash-and-burn farming, fires, and airborne chemicals from vehicles and industries. The smoke and haze released into the air can travel hundreds of miles and affect entire regions. People can become ill when they breathe the air.
Explanation: plese mark branlest!! =^.^= :D
Using four or more complete sentences, identify at least two benefits and two drawbacks of dams. Be sure to discuss
the Ataturk Dam and the Marsh Arabs in your response.
Answer:
Dams have been useful to many countries in the Middle East that depend on outside water sources, such as rivers, to survive. Dams provide extra water for farming and electricity in the countries where they are built.
Explanation:
The people of Turkey have received these benefits from the Ataturk Dam. However, this dam has caused problems for other countries. Iraq and Syria, which are located downriver from the dam, are receiving a smaller supply of water, affecting their access to farming and drinking water. The multiple dams built in Iraq during Hussein's regime highlight other issues. These dams drained the region's largest marshlands
Answer:
Dams have been useful to many countries in the Middle East that depend on outside water sources, such as rivers, to survive. Dams provide extra water for farming and electricity in the countries where they are built.
Explanation:
hope this helped!!
what is the cause of leap year
Answer:
In a leap year, we add an extra day on 29 February to our calendar of 365 days. What goes around: The reason we have February 29 every four years is because of two different time cycles involved with the rotation of the Earth. Leap years happen every four years, except if the year is a multiple of 100.
Explanation:
Hopefully this helps :)
how human and climatological causes of drought
Answer:
In a recent article, we call this anthropogenic drought, which is water stress caused or intensified by human activities, including increased demand, outdated water management, climate change from anthropogenic greenhouse gas emissions, growing energy and food production, intensive irrigation, diminished supplies,
Explanation:
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ILY<3
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Why do you think that each of the religious conquerors chose not to fully demolish the previous religious house and start over?
Answer:
They did not want to restart their religions, cultures, etc.
Explanation:
{PLEASE HELP ASAP AP HUMAN GEO}
Outsourcing has most notably led to an increase in manufacturing jobs in
A.
Asia.
B.
Africa.
C.
Europe.
D.
Australia.
E.
North America.
Answer:
a
Explanation:
Which is a more efficient means of transportation, a canoe or a motorboat? Which is the better one to use? Justify your answer.
Answer:
Motorboat
Explanation:
> Machines achieve tasks efficiency (Better than humans)
A canoe is slower than a motorboat
Canoe speed is determined by the amount of physical force used
Fuel is used to power a motorboat
Motorboat does not necessitate the use of physical force
Moves long distance with little effort
When the least amount of force is applied, the best results are achieved
Which of the following aspects of agricultural cultivation increases the risk of erosion? A. Replacing natural vegetation with cultivated crops B. Utilizing no-till planting methods C. Plowing in curved, rather than straight, lines D. Leaving plants in the ground during the winter Please select the best answer from the choices provided. A B C D.
Answer:
(A) replacing natural vegetation with cultivated crops
Explanation:
I took the test
What mineral features can be used to determine the type of mineral??
An unconformity is a(n) ______. Multiple choice question. buried erosion surface that is preserved beneath later deposits folded rock layer caused by hot spots igneous intrus
It should be noted that that unconformity is a deposits folded rock layer caused by hot spots igneous intrus.
What is unconformity?
unconformity do occur when there is deformation by an older rock before a younger rock layer, usually sedimentary, is laid down on it .
This is usually as a results of mismatched rock layers.
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ANSWER FOR BRANIEST!
What is the region of the Midwest like?
A) coastal
B) flat and fertile
C) mountainous
D) rocky
Answer:
B
Explanation:
The Midwest is the vast central region of the U.S., a landscape of low, flat-to-rolling terrain, gradually rising up to more than 5000 feet above sea level in the area called the Great Plains. The region is for the most part relatively flat, consisting either of plains or of rolling and small hills.Nov
Answer:
I'm thinking C
Explanation:
hope I'm right
Chechens are an ethic minority in russia and hav eambitions of nationalism in the past there have been terrorist acts against russia by Chechens (who view the conflict as a civil war). What challenge does this conflict represent?
A) Why does violence in Russia never lead to change?
B) How can bordering nations maintain peace?
C) How, or when, should ethnic groups gain independence?
D) How can increased free trade spread ideas?
Answer:
A. Why does violence in Russia never lead to change?
Explanation:
Some of the most commonly cited violations include deaths in custody, the widespread and systematic use of torture by security forces and prison guards, hazing rituals (known as dedovshchina, meaning "reign of grandfathers") in the Russian Army, widespread violations of children's rights, violence and discrimination .
Before satellites and radar, sailors used maps with longitude and latitude lines and _______ to plot their travels across the oceans.
Answer:
Stars
Explanation:
The sailors watch the stars move just as they are to watch the sun move across the sky. The stars will move east to west and some may begin below the horizon.
Hope this Helps!
What conclusion does the fossil record support? Question 1 options: All of Earth's organisms were formed at the same time Earth's organisms have not changed over time There is no evidence of life on Earth Species have changed over time.
The conclusion that fossil record support is that species have changed over time.
What is a fossil record?Fossil records tend to identify the life cycle and existence of different species on Earth. The shows how frequently and how much organisms have evolved.
Therefore, the transition form where one species has changed into new one could be effectivley examined.
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what does cloud cover mean
Answer: it’s is something obscured by clouds when observed from a particular location.
Explanation: Or look up what it means?
If a 375.4g piece of gold has a density of 19.3 g/cm3 , what is its volume? Round your answer to the nearest hundredth.
[tex]Volume =\frac{mass}{density} =\frac{375.4}{19.3} =19.45 cm^3[/tex]
Hope that helps!
1. Which of the following was not a leader of Russia?
A. Alexander the Great
B. Ivan the Terrible
C. Peter the Great
D. Vladimir Putin
Answer:
peter
Explanation:
identify a city in cambodia that is either a world city or at least strongly connected to other cities in the world. explain what factors make a city “global” in character
Answer:
This may not help, but Phnom Penh is a pretty good one for this.
Explanation:
______ may form as erosion by a river further downcuts and widens a canyon, making a more intricate canyon formation.
Answer:
Tributaries may form as erosion by a river further downcuts and widens a canyon, making a more intricate canyon formation.
Explanation:
Pls, choose me as brainliest!
negative impact associated with the impact of human activities on rivers
Answer:
Sulfur dioxide and nitrous oxide emitted from factories and power stations enter river systems through acid rain. Sewage and effluent are discharged into rivers in some areas.
Pollution can lower the pH of the water, affecting all organisms from algae to vertebrates. Biodiversity decreases with decreasing pH.
What is the terminator?
Answer:
i have two answers for this question because you could be talking about something different.
Explanation:
an autonomous cyborg, typically humanoid, originally conceived as virtually indestructible soldier, infiltrator, and assassin. 2nd answer. considered something to kill viruses on your body.
What is a benefit of hydroelectric power?
Hydroelectric power is a cheap and renewable source of electricity.
Hydroelectric power plants require high levels of maintenance.
Hydroelectric power helps purify water that passes through it.
Building a hydroelectric power plant has very little impact on the surrounding environment.
Answer:
To be honest I am not 100% on the answer. But to my knowledge (A) would probably be your best bet.
Explanation:
Building a hydroelectric power plant has very little impact on the surrounding environment. 'It is known that hydropower projects have impacts on the environment. Change in hydrological flow regimes, deteriorating water quality, migration corridors barriers, sedimentation, greenhouse gas emission, and biodiversity loss are environmental impacts of hydropower projects"
Hydroelectric power plants require high levels of maintenance. Is this even close to being a benefit?
Hydroelectric power helps purify water that passes through it. Honestly could be the answer but as some faults.
Hydroelectric power is a cheap and renewable source of electricity. "Hydropower is an affordable source of electricity that costs less than most. Since hydropower relies only on the energy from moving water, states that get the majority of their electricity from hydropower, like Idaho, Washington, and Oregon, have lower energy bills than the rest of the country."
Answer:Hydroelectric
Explanation:
Beneath a blanket of sediments, oceanic crust is primarily composed of ________. Group of answer choices
Answer:
Gabbro and basalt
Explanation:
The oceanic crust is mainly made of gabbro rocks and different types of basalt rocks.
How does a glacier form in the ideal area for hydroelectric power station?
Answer:
when glacier melts it is used to run electric turbines
1.2 Why are currents cold?
Answer:
Deep ocean currents.
Explanation:
In cold regions, such as the North Atlantic Ocean, ocean water loses heat to the atmosphere and becomes cold and dense. When ocean water freezes, forming sea ice, salt is left behind causing surrounding seawater to become saltier and denser. Dense-cold-salty water sinks to the ocean bottom.
Ozone in the ________ is important for absorbing and scattering much of the UV radiation coming into Earth's atmosphere from the sun.
Answer:
Earth 's stratosphere
Explanation:
it contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.