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.
Method to mine a mineral deposit which includes open pit mining quarrying placer mining and strip mining
Answer:
Surface mining
Explanation:
The method covered in the question above is called Surface mining.
Surface mining refers to the practice of extracting ores that are in the soil at medium and shallow depths, that is, they are close to the surface. This type of extraction of ores, exploits the mineral deposits until it causes its depletion, creating small depressions in the land that can be used to create landfills. The main ores found in this type of extraction are: limestone, clay, marble, coal, plaster, among others.
what is most associated with the white revolution?
Answer:Dr Verghese Kurien is the pioneer of White Revolution in India... milk
Explanation: White revolution is associated with milk and hence it is called the white revolution.
Need help brainliest to best answer
Which of the following industries depends on the cultivation of sugar and has been most closely linked with increased deforestation in the Amazon Rainforest?
A. biofuel
B. chocolate
C. candy
D. soda
Answer:
D
Explanation:
A chocolate bars placed in a hot pan the chocolate began to flow and it took shape of the pan show why the chocolate changed phase
Answer & Explanation:
The heat from the hot pan fuses/melts the chocolate bar from its solid state to its liquid state. The chocolate bar deforms and takes the shape of the pan as it liquifies. Liquified chocolate then cools down, solidifies back to its solid state.
Durante la posguerra, Estados Unidos y Europa iniciaron una serie de negociaciones. ¿Cuál fue uno de los principales resultados de esa negociación?
Answer:
Dos resultados: Plan Marshall (1.947 - 1.952): Reconstrucción económica de Europa, la Organización del Tratado del Atlántico Norte (1.949 - ): Esquema defensivo de Europa frente a una potencial invasión soviética.
Explanation:
En esas negociaciones se establecieron dos iniciativas que marcarían el desarrollo de la Europa Occidental hasta la fecha, el primer resultado fue el desarrollo del Plan Marshall, un plan de reconstrucción de los países de Europa Occidental con dineros, empresas, bienes, servicios y especialistas estadounidenses que permitió a los gobiernos de aquellos evitar el triunfo de partidos comunistas, especialmente en Italia y Francia, además permitió que Europa recuperara sus niveles de producción de antes de la Segunda Guerra Mundial a finales de los años cincuenta y se reconstruyera plenamente a finales de los años sesenta.
Sin el Plan Marshall, no hubiera sido posible los Treinta Gloriosos en Francia (1.945 - 1.973), la Wirtschaftswunder en la Alemania Occidental (1.949 - 1.964) o el Miracolo economico en Italia (1.957 - 1.968). Tampoco habría sido posible el desarrollo de la Comunidad Económica Europea, antecesora de la actual Unión Europea.
Otra consecuencia, fue el establecimiento de una alianza de fuerzas militares con centro en unidades destacadas de las Fuerzas Armadas de los Estados Unidos en Europa, bajo el nombre de la Organización del Tratado del Atlántico Norte (O.T.A.N.) en 1.949, diseñada inicialmente para contener y combatir una invasión soviética a los países de Europa Occidental.
What are the five causes of poor infrastructure ?
some comets disappears forvers give reason in 2 points
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:
"HS2 is the most effective strategy to reduce the north south divide" - To what extent do you agree with this statement? (9 marks)
Please help me answer this.
My most effective strategy is the northern powerhouse so I disagree with this statement but I don't know how to structure it.
Explanation:
jsisnsibsidbsisbisnsisnsixsnisnssjsjsjsjsnzksj
Please find the value of x
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:
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
7. Which of the following is NOT an economic activity common to the Middle East?
Answer:
Europe, the Economic Commission for Asia and the Far East and the Eco- nomic Commission for Latin America; regional economic commissions do not exist in respect of Africa and the Middle East. The reports in their ..
Need help ASAP please
What natural phenomena created Japan? I WILL GIVE YOU THE BRAINLIEST!!!!
Answer:
tsunamis, floods, typhoons, earthquakes, cyclones, and even volcanic eruptions.
Explanation:
Which body of water would you travel on to go from the Iberian Peninsula to the Italian Peninsula?
Answer:
The landmass is bounded by the Bay of Biscay (Atlantic) in the north, the Mediterranean Sea in the south and east, the Alboran Sea (a body of water of the Mediterranean Sea) and the Bay of Cádiz in the south, and the North Atlantic Ocean in the west.
Explanation:
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explain how migration from India may have benefited the Indians and people in the countries they settled in around the world.
Answer:
New culture, cheap labour
Does anyone understand this? Help!
Why don’t earthquakes count as severe weather? Explain your answer.
Answer:
There is no such thing as "earthquake weather". ... Very large low-pressure changes associated with major storm systems (typhoons, hurricanes, etc) are known to trigger episodes of fault slip (slow earthquakes) in the Earth's crust and may also play a role in triggering some damaging earthquakes.
Explanation:
hope i helped
Answer: Earthquakes are not considered weather events since they are geological events, where all types of weather are meteorological events. Earthquakes are frequently created by shifts in our tectonic plates (underground) and weather takes place within our atmospheric layers.
Explanation:
For the line segment whose endpoints are A(0,0) and B(4,3), find the X coordinate for the point located 2/3 the distance from a to b.
Answer:
2.7
Explanation:
Short answer: took the test
Actual explanation: Finding the coordinate means that we need to find the x distance first between the two points. So, the coordinates are A (0, 0) and B (4, 3).
- the x distance: 0 to 4, which is 4 units.
Using the 4 units and the fraction, 2/3 because we want to find it 2/3 the distance a-b, we set it up like this
-2/3 * 4/1 (4/1 comes from the x-distance, which is 4 units) and get 8/3 (by multiplying across) which is 2.666,
and we round it to get 2.7, which is the final answer.
they are only asking for the x-distance, which is why we only solved for the x distance.
hope this helps :)
~addison~
Two unique points on a line define the boundaries of a line segment. A line segment is sometimes referred to as a section of a line that links two places.
2.7 : In order to calculate the coordinate, we must first determine the x distance between the two points. So, A (0, 0) and B are the coordinates (4, 3).
- the x distance, which is 4 units from 0 to 4.
This is how we set it up using the 4 units and the fraction 2/3 to get the distance between a and b.
-2/3 * 4/1 (4/1 is the result of the x-distance, which is 4 units), which produces 8/3 (by multiplication across), which is 2.666,
2.7 is the result after rounding, which completes the equation.
We just provided a solution for the x distance since that is all they asked for.
What is an example of a line segment?A point at one end, which serves as the beginning point, and an arrow at the other end are used to symbolize rays. This arrow signifies that the line never ends.
A line that you observe without an initial or a terminus is an example. In real life, a line segment might be represented by a stick, a pencil, or a ruler.
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What is Hydrosphere ?
Explanation:
all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
List 3 serious effects volcanoes can have on land/people...
Answer:
Fast-moving lava can kill people and falling ash can make it hard for them to breathe. They can also die from famine, fires and earthquakes which can be related to volcanoes. People can lose their possessions as volcanoes can destroy houses, roads and fields
Explanation:
Attempt all questions in this section.
Question 1.
a) List any four effects of burning fuel wood on the health of rural women.
b) Mention two initiatives that can be taken to reduce damagn of Thi Mohal
Answer:
It causes lung diseases, eye diseases, heart diseases and tuberculosis.
Explanation:
There is a negative effects of burning fuel wood on the health of rural women. It causes lung diseases, eye diseases, heart diseases and tuberculosis. This smoke of the wood is the cause of various diseases as well as disorder in various organs of the body. these diseases are very common in rural areas as compared to urban due to usage of wood for cooking meals instead of electricity so that's why these diseases are more common in the rural women as compared to urban women.
type of federalism in which both the state and the
national levels of government are equal authorities
operating within their own spheres of influence
Answer:
dual federalism.
Explanation:
I hope this helps
What ocean separates Africa and India?
Answer:
The Atlantic Ocean meets the Indian Ocean south of Africa at Cape Agulhas. The Indian Ocean,
Explanation:
I hope this helps you :)
What can you do when you feel pressured to do things you’re unsure of?
Answer:
check in with yourself. ask, "how am I feeling about this?" " does this seem right to me?" " what are the pros and cons of making this decision?"
Explanation:
definition of geostrophic force
Geostrophic wind
Answer:
A geostrophic current is an oceanic current in which the pressure gradient force is balanced by the Coriolis effect. The direction of geostrophic flow is parallel to the isobars, with the high pressure to the right of the flow in the Northern Hemisphere, and the high pressure to the left in the Southern Hemisphere.
Name the mass movement shown in fig 3
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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Salmon farming threatens the health of wild salmon stocks primarily because
A. farmed salmon can spread parasites and disease to wild salmon
B. salmon farming prevents interbreeding between domesticated varieties of salmon and their wild counterparts
C. salmon farming prevents commercial fishing fleets from overharvesting wild salmon
D. farmed salmon compete with wild salmon for spawning sites
Answer:
A. farmed salmon can spread parasites and disease to wild salmon
Explanation:
The correct option is - A. farmed salmon can spread parasites and disease to wild salmon
Reason -
Salmon farming threatens the health of wild salmon stocks primarily because farmed salmon can spread parasites and disease to wild salmon.
The sandstorms that occur in China are fueled by growing __________. A. populations B. forestation C. desertification D. industrialization Please select the best answer from the choices provided
Answer:
C
Explanation:
The dude above is correct
Answer:
c
Explanation: