Answer:
idontknow
Explanation:
Rock Layer E is 250,000 years old. Rock Layer C is 200,000 years old. Rock layer C has not undergone radioactive decay and has 18 radioactive isotopes. The half-life is 50,000 years. Rock Layer E has undergone radioactive decay ONCE, how many daughter and parent isotopes are present in layer E?
Answer:
Explanation:
By definition, after a radio active decay, a parent isotope will create a daughter isotope.
Layer C is exactly one half-life from Layer E at 50000 years. So half of the original parent isotopes from Layer E would have decayed to form daughter isotopes. As C has 18 radioactive isotopes together, E should have 6 daughter and 6 parent isotopes.
Answer:
Explanation:
Rock Layer E is 250,000 years old. Rock Layer C is 200,000 years old. So the two layers are off by 50,000 years; equal to one half-life.
As Rock Layer E has undergone radioactive decay ONCE, each parent isotope forms one daughter isotope after the decay.
Rock layer C has not undergone radioactive decay and has 18 radioactive isotopes. So that represents an equal number of parent and daughter isotopes, i.e. 9 parent and 9 daughter isotopes.
So there are 9 parent and 0 daughter isotopes in layer E.
which level of economic activity is represented by the shaping of wood to be made into a desk?
Answer:
secondary, as it is factory work
Which statement best describes the Sun-Earth-Moon system during a neap tide?
Answer:
i think it is b
Explanation:
are these your options?
A. The Sun, the Moon, and the earth are in a straight line.
B. The Moon, the Sun, and earth form a right angle
C. Earth is behind the Sun and the Moon
D. The Sun is between Earth and the Moon
if they are then it is b
Answer:
B
Explanation:
I used to think America was _____________________________, but now I think America is_____________________________________.”
Answer:
(a) was everyone's dream country
(b) totally racist
What are the 3 challenges to the role of science?
Answer:
Financial crunch in academia. Researchers face perpetual struggle to secure and sustain funding. ...
Poor study design in published papers. ...
Lack of replication studies. ...
Brainliest would be great!
Answer:
Financial crunch in academia. Researchers face perpetual struggle to secure and sustain funding.
Problems with peer review.
The problem of research accessibility.
Explanation:
some comets disappears forvers give reason in 2 points
What are the five causes of poor infrastructure ?
Despite the distance between California and Australia, the value of gold
in the 1800s spurred Gold Rushes on both the North American and
Australian Continents which allowed innovations in mining to spread
between the two countries. This is called-
Select one:
a. Convergence
b.Divergence
c.Transmission
d.Outsourcing
The provocation of Gold Rushes leading to the integration of both the North American and Australian Continents for innovations regarding mining would be called:
A). Convergence
'Convergence' is described as the process of 'merging of distinct technologies or devices into a unified whole.'In the given situation, the coming together of two continents i.e. North American, as well as, Australian continents to work together in the field of mining technology would be called 'convergence.'Since the innovation brought the two continents in unity to work in integration for further development and innovation, it is convergence.Hence, option A is the correct answer.
Learn more about 'Convergence' here:
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What keeps South American countries from unifying during their independence movements?
Answer:
The Latin American Wars of Independence, which took place during the late 18th and early ... in the creation of a number of independent countries in Latin America. ... independence movements that culminated in the wars of independence, which ... to keep the Spanish-speaking parts of the continent politically unified Explanation: i hope this helps
at type on
ectromagnetic radiation has a wavelength of 3.2 X
2. What type of electromagnetic radiation has a wavelength of 4.0 x 10-9
3. What type of electromagnetic radiation has a wavelength of 7.3 x 10-5
4. What type of electromagnetic radiation has a wavelength of 1.2 x 10-13
5. What type of electromagnetic radiation has a wavelength of 6.8 x 102
Answer:
at type on
ectromagnetic radiation has a wavelength of 3.2 X
2. What type of electromagnetic radiation has a wavelength of 4.0 x 10-9
3. What type of electromagnetic radiation has a wavelength of 7.3 x 10-5
4. What type of electromagnetic radiation has a wavelength of 1.2 x 10-13
5. What type of electromagnetic radiation has a wavelength of 6.8 x 102
Help please
Help help help
explain six ways humans can impact the water cycle?
Answer:
THE WATER CYCLE: A GUIDE FOR STUDENTS
Step 1: Evaporation. The water cycle begins with evaporation. ...
Step 2: Condensation. As water vaporizes into water vapor, it rises up in the atmosphere. ...
Step 3: Sublimation. ...
Step 4: Precipitation. ...
Step 5: Transpiration. ...
Step 6: Runoff. ...
Step 7: Infiltration.
Explanation:
please give me brain list and follow
Please find the value of x
Lisa is on a trip of 1,300 miles. She has already traveled 50 miles. She has 5 days left in her trip. How many miles does she need to travel each day to complete the trip?
1300 miles - 50 miles = 1250 miles
1250 miles ÷ 5 days = 250 miles
so she need to travel 250 miles
10. Which militant political group is responsible for many of the hardships faced by people living (1 point)
in Afghanistan?
O guerrillas
ONAFTA
O Taliban
O refugees
Answer: The Taliban
Explanation:
Which current has a cooling effect on the climate of the west coast of South America?
(1) Falkland Current
(2) Peru Current
(3) Benguela Current
(4) Brazil Current
What were James Buchanan’s political accomplishments? Identify and explain at least 3 accomplishments
Answer:
James Buchanan was a lawyer whose gift for oratory led him to politics. He served in the Pennsylvania legislature (1814–16), the U.S. House of Representatives (1821–31), and the U.S. Senate (1834–45). He also served in the presidential administrations of Andrew Jackson, James K.
Explanation:
Explica porque el movimiento de las placas tectónicas producen terremotos y erupciones volcánicasl explica porque el movimiento de las placas tectónicas producen terremotos y erupciones volcánicas
Answer:
De acuerdo con la teoría de las Placas Tectónicas, el choque o separación entre las placas generan movimientos que se acumulan hasta generar grandes tensiones que luego se liberan a través de terremotos, y con la erupción de volcanes.
Explanation:
Por eso los volcanes y terremotos ocurren en los límites de las placas tectónicas. Los terremotos ocurren en las zonas de choque, mientras que los volcanes se encuentran en las zonas tant de choque como de separación, dado que ambos movimientos favorecen el ascenso de magma.
Circles around an object is
1. asteroid belt
2. atmosphere
3. orbits
4. gravity
Answer:
atmosphere is the answer
What is phages of moon?
Answer:
The lunar phase or Moon phase is the shape of the Moon's directly sunlit portion as viewed from Earth. The lunar phases gradually change over a synodic month as the Moon's orbital positions around Earth and Earth around the Sun shift.
How did Islamic empires use taxes to encourage conversion?
Answer:
People who converted did not have to pay tax or had lower taxes.
Explanation:
:)
They used taxes to tax the people out of their tax money.
What does Egypt look like in the map
Answer:
Explanation:
I do not know
Imagine you are a city planner. You have the option of providing electricity to your city either through natural gas or through nuclear power. Natural gas is slightly cheaper, but new carbon taxes are about to be implemented in your state. Which do you decide to use? Why?
Answer:
Nuclear power
Explanation:
Even though it may cost a little more, it probably has the less effect on the environment. In times like these with climate change and the earth dying, it is important to do the best we can to reduce it. It has cons tho, nuclear power can be extremely dangerous if it goes wrong... Despite its safety measures, it's still pretty dangerous. Hope it helps!
The natural gas is slightly cheaper but as per taxes in the state, but for city planning more effcient way is to use nuclear power. Thus city panning can be done.
What is nuclear power?Nuclear power is a clean and efficient way of making use of energy resources that can be sued for boiling water that runs the turbines that generate electricity.
The nuclear power is power that is obtained from the fission and the nuclear decay. Even though nuclear power costs bit more but its less effect on the environment.
Find out more information about the nuclear power.
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Please please no links please please I really need it please no links please I beg you.
Why do you think All schools should require Teacher’s assistant?
Please 6 complete sentences
Answer:
Teaching Assistants work with teachers and make sure that the classroom is learning efficiently. They help to plan and prepare learning resources and map out strategies for students who are struggling. The teachers assistant might have different strategies that benefit the kids better. They help keep the classroom neat, clean and fresh. A teacher that has an assistant can help students twice as fast, saving a lot of time. All around, all schools should require teacher’s assistant because they benefit classrooms, and everyone in it, greatly.
Explanation:
Where do you think chemical weathering of limestone would be faster- in a hot desert or in a rainy northern valley? Please explain and quick!
Answer:
rainy northern valley
Explanation:
in a desert it wont rain much as it is closer to the equator so less chance but the valley is north so higher chance of rainfall in the first place and the things in a rainy northern valley are more susceptible to chemical weathering due to the rocks.
PLEASE HELP ASAP IM TAKING A TEST PLSPLS I WILL GIVE BRAINLIEST
What special physical property of the upper mantle supports the Theory of Plate Tectonics?
Lithosphere
The lithosphere is the solid, outer part of the Earth, extending to a depth of about 100 kilometers (62 miles). The lithosphere includes both the crust and the brittle upper portion of the mantle. The lithosphere is both the coolest and the most rigid of Earth’s layers.
If you divide the yes by windmill and multiply grass with chicken. what sky is cheese?
Answer:
? what does your question mean, it doesnt make sense.
Describe two effective means of preventing the spread of malaria.
Answer:
There are two central blocking systems: Protective bed nets treated with long-lasting instinct poison prevent bites from malaria-infected mosquitoes and kill them. Nets should be available for free or at low prices because of high subsidies. There should be one net per two people who are at risk of being infected.
Explanation:
Presently, Mosquito control and mosquito-bite prevention are the two key approaches used to prevent malaria.
How can you prevent the spread of malaria?Personal protection measures against mosquito bites- Malaria is primarily transmitted at night since the majority of Anopheles mosquitoes bite at night. Wearing clothing that covers the majority of the body, using insect repellent on exposed skin, and using mosquito bed nets are all ways to prevent mosquito bites. Age and status affect the kind and strength of repellents.Mosquito prevention- The effectiveness of vector control strategies is dependent on the vector species, the biology of the mosquito, the epidemiological situation, the cost, and the acceptability to the people. The primary current approaches concentrate on reducing human-mosquito interaction and eliminating larvae through environmental management.To learn more about malaria
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Which situation has limited economic development in much of the Middle East?
Answer:
Middle Eastern countries have become rich only with the resources available and they have high per capita income due to the oil production. So, they have only one major source of income. ... These countries are not considered developed because they lack other basic facilities such as health care and education.
Please help me with the four bottom ones! :)
Answer:
Mountain ranges, earthquake and formation of new lakes occurs.
Explanation:
When two places comes together forming mountain ranges in that area. When two plates move away from one another, earthquakes occurs and magma rises to the surface. The diversion of rivers and the formation of new lakes. Two plates that forms a gap between each other causes the formation of new lakes, diversion of rivers and disturb the weathering patterns. When two plates sliding alongside each other forming faults that leads to earthquakes in that region.