Answer: The rock is 2000785 years old.
Explanation:
Expression for rate law for first order kinetics is given by:
[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]
where,
k = rate constant
t = age of sample
a = initial amount of the reactant = 800
x = amount of daughter isotope = 600
a - x = amount left after decay process = amount of parent isotope = (800-600) = 200
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
[tex]t_{\frac{1}{2}}=\frac{0.693}{k}[/tex]
[tex]k=\frac{0.693}{1000000}=0.000000693years^{-1}[/tex]
[tex]t=\frac{2.303}{0.000000693}\log\frac{800}{200}[/tex]
[tex]t=2000785years[/tex]
The rock is 2000785 years old.
There are four main types of mechanical weathering: frost wedging in which rocks are broken by water freezing within cracks, salt crystal growth in which rocks are broken by salt freezing within cracks, sheeting in which rocks dome upward and peel off, and biological activity in which living things such as tree roots break rocks apart. You will visually identify these types. Note that one of the images is not an example of mechanical weathering.
Answer:
answer is given below
Explanation:
there are 5 types of mechanical weathering are
Thermal expansionFrost weatheringExfoliationAbrasionSalt crystal growthThe mechanical or physical environment breaking rock. The mechanical environment does not change the chemical composition. it breaks down into small pieces.Due to constant ice and melting in the ice, the rocks can break into small pieces. It occurs in temperate highlands.Salt erosion occurs in coastal areas where saline water accumulates in seawater rocks. Peeling is also known as exfoliation and occurs in desert areas where rocks are constantly shrunk and there is a huge change in temperature.The biological environment is caused by plant roots or sinking animals. Because of their actions, the stones are broken into small pieces.Mechanical weathering includes frost wedging, salt crystal growth, sheeting, and biological activity. Each of these processes cause rocks to break or peel apart, often due to the growth of crystals (like salt or ice) in cracks, or due to actions of living organisms.
Explanation:The four main types of mechanical weathering are frost wedging, salt crystal growth, sheeting, and biological activity. Frost wedging refers to the process where water seeps into cracks in the rock, freezes, and expands, causing the rock to break. Salt crystal growth occurs when saline solution enters cracks in the rock, evaporates, and leaves behind salt crystals that break the rock. Sheeting is when differential weathering causes rocks to dome upward and peel off in layers. Lastly, biological activity involves living organisms (like tree roots) breaking apart rocks as they grow into cracks.
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Which of these is not a government enacted and backed legal action that have been taken with the intention of saving species and
preserving biodiversity?
The Endangered Species Act (ESA)
The Convention on Biological Diversity (CBD)
The Convention on International Trade in Endangered Species
Food and Drug Administration (FDA)
Answer:
its a
Explanation:
bc i did it
Taking existing elements of society and creating something new to meet a need is called (blank)
Answer:
Innovation
Explanation:
Innovating is basically the practice of introducing something new to change something.
These are segments of the columnar stem of what fossil echinoderm animal? Each disk is a single crystal of calcium carbonate, and in life the animal's living tissue threaded through the hole passing through the stack of disks.
Answer:
Crinoids.
Explanation:
These are segments of crinoids.
The columnar stem of a fossil echinoderm animal is composed of single crystals of calcium carbonate, creating a unique structure that characterizes these ancient marine organisms.
The fossil described with segments of a columnar stem and each disk being a single crystal of calcium carbonate refers to a type of echinoderm. The living tissue of the echinoderm would have been threaded through the hole in the center of these stacked disks.
This structural feature aligns with echinoderms such as sea urchins or sand dollars, which are part of the Echinoidea class. These animals exhibit a distinctive endoskeleton made up of calcareous ossicles, supporting a water vascular system crucial for their movement and survival.
The German government created a program known as Kindergeld. This program provides all tax-paying Germans with a monthly allowance to help defray the cost of having children. The benefits are extended to families with any children up to the age of 18 years.
This policy could BEST be described as which of these?
A) pull factor
B) push factor
C) pro-natal policy
D) anti-natal policy
(blank) is the total knowledge,attitudes,and behaviors shared by and passed on by the members of a specific group
Answer:
Culture
Explanation:
Culture is customs or knowledge that are passed down or shared between a certain group.
which body of water borders India on the east
Answer:
bay of bengal
Explanation:
Answer: its b the Indus River
Explanation:
I need help please?!!!!
Answer:
Multiple Vortex .... I believe
Explanation:
Why does Neptune take 165 earth years to revolve around the sun , while Jupiter only needs 11.9 earth years to do so.
A) Neptune is lighter than Jupiter
B) Neptune spins slower than Jupiter
C) The sun is closer to Jupiter than Neptune
D) The density is higher than that of Jupiter
Answer:The sun is closer to Jupiter than Neptune.
Explanation: The actual definition of a year is the time it takes a planet to complete a single orbit around the Sun.
Neptune has an extremely wide orbit and a comparatively slow orbital velocity. As a result, a year on Neptune is very long.
Answer:the answer it’s C
Explanation:
Millions of years have passed since the split between the nonhuman apes and Homo sapiens. Many of the evolutionary changes that have occurred are still relevant today and will likely be relevant to our future. Which of the following are the most important evolutionary changes that happened during the Neolithic period?
1. development of technology
2. degradation of the environment including climate change
3. increased importance of culture as an adaptive mechanism
Answer:
3. increased importance of culture as an adaptive mechanism
Explanation:
Millions of years have passed since the split between the nonhuman apes and Homo sapiens. Many of the evolutionary changes that have occurred are still relevant today and will likely be relevant to our future. Which of the following are the most important evolutionary changes that happened during the Neolithic period? increased importance of culture as an adaptive mechanism
Neolithic Revolution is known as the Agricultural Revolution where major changes were introduced and wide-scale transition of many human cultures from a lifestyle of hunting and gathering to one of agriculture and settlement, making an increasingly increased importance of culture as an adaptive mechanism
what caused the temperance movement
Answer:
Explanation:
The earliest temperance reformers were concerned with the overindulgence of American drinkers and encouraged moderation. By 1830, the average American older than 15 consumed at least seven gallons of alcohol a year. Alcohol abuse was rampant, and temperance advocates argued that it led to poverty and domestic violence.Which of the following statements is true regarding proportion of land and oceans in the Southern and Northern Hemisphere? Which of the following statements is true regarding proportion of land and oceans in the Southern and Northern Hemisphere? The highest proportion of land lies between 30 degrees and 60 degrees South of the Equator. The Southern Hemisphere is dominated by oceans, relative to the Northern Hemisphere. The Southern Hemisphere is dominated by land, relative to the Northern Hemisphere. Both the Northern and Southern Hemispheres exhibit the same proportion of land and oceans. The Northern Hemisphere is dominated by oceans, relative to the Southern Hemisphere.
Answer:
The Southern Hemisphere is dominated by oceans, relative to the Northern Hemisphere.
Explanation: The Southern Hemisphere is dominated by maritime influences, whereas the Northern Hemisphere is dominated by continentality.
The Southern Hemisphere has much less land than the Northern Hemisphere, resulting in weaker asymmetries at its lower boundary. A more zonally symmetric circulation, with smaller-amplitude stationary waves, is thus expected. Due to the larger fraction of the ocean, the seasonal cycle will also be muted. The seasonal change in surface temperature, for example, will be smaller than in the Northern Hemisphere.
Final answer:
The statement that the Southern Hemisphere is dominated by oceans, relative to the Northern Hemisphere, is true. The Northern Hemisphere is more land-dominated, with oceans covering 61% of its surface, compared to 81% in the Southern Hemisphere.
Explanation:
The question is about the proportion of land and oceans in the Southern and Northern Hemisphere and which of the statements provided is true. The true statement and the correct answer is: The Southern Hemisphere is dominated by oceans, relative to the Northern Hemisphere. This is evidenced by statistical data showing that 61% of the Northern Hemisphere is covered by oceans, while in the Southern Hemisphere, the oceans cover 81% of the surface area. Thus, the highest proportion of land is not between 30 degrees and 60 degrees South of the Equator. Additionally, the Northern Hemisphere is more land-dominated, contrary to the suggestion that it is dominated by oceans relative to the Southern Hemisphere. Both hemispheres do not exhibit the same proportion of land and oceans.
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questions
Describe the environmental damage that occurred during the Persian gulf war
Answer:
The benefits of green buildings have convinced many architects and construction companies to “go green” in order to protect the environment, save money, reduce pollution, and increase human health and happiness. Green building is a trend that is here to stay.Buildings that are “green” also have reduced operating costs.
Explanation:
i just did it and i got it right
The Persian Gulf War resulted in significant environmental damage, including oil spills and destruction of oil wells. This caused damage to marine life, ecosystems, and air quality.
Explanation:Environmental Damage During the Persian Gulf WarThe Persian Gulf War, which took place from 1990 to 1991, resulted in significant environmental damage in the region. The main environmental consequences of the war were oil spills and the destruction of Kuwait's oil wells by the Iraqi forces.
As a result of deliberate sabotage, around 6 million barrels of crude oil were released into the Persian Gulf, causing extensive damage to marine life and ecosystems. Additionally, the oil fires caused by the destruction of Kuwait's oil wells released large amounts of pollutants into the air, leading to air pollution and health issues in the region.
Efforts were made in the aftermath of the conflict to address and mitigate the environmental damage. However, the impacts of the Gulf War on the environment were substantial and underscored the need for international cooperation in managing and mitigating the environmental consequences of conflicts.
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Write a similarity statement for the similar triangles.
Answers: 1) SRQ. 2)SQR. 3)QRS. 4)QSR
Answer:
[tex]\triangle LMN \simeq \triangle QRS[/tex]
Explanation:
The length of LM is twice as the length of QR and the length of MN is twice as the length of RS. By Pythagorean theorem, the length of LN is twice as the length of QS. Then, [tex]\triangle LMN \simeq \triangle QRS[/tex].
The capital of California is
Answer:
The capital of the state of California is Sacramento.
Answer:
The capital of California is Sacramento
Explanation:
I lived there for 3 years, and hated every second of it! No AC for 3 years!!!
How do you think different people's chromosomes would compare?
Answer:
hah gotti
Explanation:
HAH GOTTTTTTI
The state of Texas is best considered a formal region because: a) only one language is spoken in most of the cities of the region b) it is a part of the United States c) transportation systems converge in the major highways of the region d) the climate is the same everywhere in the region e) the same state laws apply everywhere in the region.
Answer:
e) the same state laws apply everywhere in the region.
Explanation:
A region or state is considered as a formal region when they share common features with each other. There is always a uniform and unique characteristics that applies to inhabitants of the region involved.
Texas is known for having various state laws which are applicable in the whole region. This characteristic makes it a formal state.
The state of Texas is considered a formal region because it is under a single government and the same state laws apply throughout the whole region. Other factors like language, transportation, and climate can vary within the state.
Explanation:The state of Texas is best considered a formal region because the same state laws apply everywhere in the region. A formal region is defined by governmental or administrative boundaries. Texas, being a state of the United States, fits into this definition because it has a defined territory under a single government, and as such, the same state laws apply uniformly across the whole region.
Other aspects like language, transportation, and climate can vary within a formal region like Texas, but these elements do not primarily define it as a formal region.
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Cold temperatures during the Late Pleistocene led to lower sea levels as a result of glaciers trapping significant amounts of water. This decrease in sea levels exposed landshelves and allowed modern humans to migrate to previously uninhabited continents. Identify the continents to which early modern humans were able to migrate due to low sea levels.
Answer:
Africa to Middle east to Asia and to Oceania and then to Eurasia and to America.
Explanation:
The human migration started around 2 million years ago form the continent of Africa, the early humans crossed the land bridges that were covered by water. The population of the early homo sapiens migrated to Europe between the 130,000 and 115,000 million years ago. Reaching china through the nile valley and heading to the middle east into modern Israel by the Strait on the Red Sea at the time sea level was much lower and narrow. The migration continued through Asia to the southeastern coast and entering the Australia 50,000 years ago. At the time of the last glacial maximum. Also, the coastal population around the southeast Asia grew with the dispersal of the humans giving rise to the old and the new world i.e America. Paleo Indians emerged for central Asia crossing the Beringia land bridge between the eastern Siberia and present-day Alaska. Continued by the end of the last glacial peroid i.e 23,000 years BP.Low sea levels during the Late Pleistocene exposed land bridges in maritime Southeast Asia and the Beringia land bridge between Asia and North America, enabling human migrations to Australia and the Americas.
Explanation:Migration of Early Modern Humans Due to Low Sea LevelsDuring the Late Pleistocene, significant climate changes vastly impacted the Earth and its inhabitants. The onset of an ice age caused global temperatures to drop, leading to the formation of extensive glaciers that trapped water and consequently lowered sea levels. This geological transformation exposed land bridges previously submerged under the sea, creating accessible routes for human and animal migrations to previously isolated continents.
Specifically, early modern humans (Homo sapiens) took advantage of these lower sea levels to migrate across what is now maritime Southeast Asia and into Australia. There, they established societies on land that is currently submerged or separated into islands. Simultaneously, a considerable land bridge known as Beringia emerged between modern-day Russia and Alaska, which allowed humans to migrate from Asia to North America. Although the exact timing is still debated, it's likely that these migrations occurred when the last glaciation period was at its peak, about eighteen thousand years ago.
As Earth's climate eventually warmed and the ice melted, sea levels rose again, submerging land bridges and reshaping the world's coastlines and inland waterways. This brought about ecological opportunities as well as challenges, leading to the adaptation and isolation of various human groups.
Like other major cities, Los Angeles has experienced violence and civil unrest. Why did Los Angeles experience riots in 1992? Quickly describe the events that set off days of rioting in the city.
Answer: Los Angeles experienced riots because of a man named Rodney King was drunk driving and when he eventually stopped the police brutally beat him without remorse. It started with protests of people yelling "no justice, no peace."
Answer:
The Los Angeles riots of 1992 were a series of serious riots, looting, and arson that took place in Los Angeles County, California in 1992. These were the largest riots in the United States since the 1967 Detroit riots, the largest in Los Angeles since the 1965 Watts riots, and the riots with the highest number of deaths since the 1863 riots in New York.
The riots began on April 29, 1992, when a jury acquitted four white policemen accused of beating a black taxi driver Rodney King, who resisted to be arrested. A video showing King being beaten by police officers was released to the media. As a result, thousands of African American citizens in Los Angeles, considering the verdict as unfair, took to the streets. The riots lasted six days. The crowd carried out thefts, assaults and arson, with losses estimated at over 1 billion dollars. Peace on the streets was restored only after members of the National Guard of California, 7th Infantry Division and the 1st Maritime Division were called to prevent further riots when the local police were unable to control the situation. In total, 63 people were killed during the riots, 2,383 people were injured, over 12,000 were arrested and 3,767 buildings were burned.
On April 29, Los Angeles underwent riots. This event occurred due to the cruel beating of Rodney Kings by the LAPD. Rodney was drunk driving on the roads and was stopped by the police.
The brutal beating by LAPD came into the limelight because they were white policemen and King was a black taxi driver.
A videotape of the vicious beating of the man was released by the media which infuriated the African Americans of LA.
The people went berserk and the city underwent larcenies, arson and aggression.
The local police were unable to control the riot and the harmony was resurrected after special forces were called in.
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13 points - The best answer gets brainliest
Choose a physical feature of your choice located in the continent of Asia (it can be a mountain
range, a desert, an ocean). Using your creative mind I would like you to describe your journey
through this physical feature.
VII
- Describe where you are travelling to and from
- Describe what you can see and hear and feel.
- Describe your thoughts and emotions on your journey.
Try to be as creative as you can! Maybe you are on an adventure to the top of Mount Everest?
You are expected to write at least a half page on this however please make these as exciting as
you can. Please see grading criteria below.
Also don't worry about 'outstanding vocabulary as I'm only 12 years old. This should take about 10 minutes if anyone is willing to do this thank you.
At the top of the Miyar Valley in the high Himalayas, a chain of seven tiny turquoise pools nestle below the snout of a formidable glacier. Each one looks deceptively inviting. We plunge in and our shouts, as we brave the icy water, echo off walls of rock into empty air; there is no one but our group around to hear. For miles in every direction there are only mountains; their white peaks, sheer slopes and pockets of high hidden valleys are filled with wild flowers for just a few months of the year, mainly June and July, when their cape of snow melts away. Most stunning are the fragile, brilliant blue Himalayan poppies, which inspire such devotion that there is a book, Blue Heaven, dedicated to them. Some are scattered among the rocks around the pools, above the grassy meadows which feel like our own private heaven. We rest here for a day to acclimatise before heading up on to and across the glacier, playing cricket at nearly 4,000m and reading in the sunshine. Mobile phone reception had petered out beyond the last village several days earlier, so even the most anxious have gradually settled into the rhythm of unconnected days, blissfully cut off from the rest of the world. In the week after leaving the highest village in the long Miyar Valley, we see yaks and horses roaming half-wild, and marshy lakes filled with migrating birds, a joyful patchwork of red, pink, white, yellow and blue flowers,but fewer than a dozen other people. Most are nomad shepherds who spend the summer guiding their flocks to seasonal grazing grounds along ancient paths invisible to the uninitiated, dotted with tiny stone huts that provide shelter from the elements. We set off on our trek early the next morning through pine forests with a soft, fragrant carpet of cones and fallen pine needles, tracing field boundaries beside the raging torrent of the Miyar River and its tributaries. There were some bridges, but twice we crossed the old way, in iron baskets suspended from a wire, hauled back and forth by fellow travellers. They sway from wind and movement as you inch over freezing water, stirring up fear and exhilaration like a good rollercoaster. By that evening we had left civilisation behind, setting up our first campsite on the edge of the wilderness. We were not roughing it. It might not be “glamping” as recognised by anyone who likes to commune with nature accessorised with fresh sheets and deep baths, but to me it seemed as close as you could get deep in a pristine Himalayan valley at 3,000m.
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Low concentrations of insecticide do not affect leopard frogs, but are lethal to zooplankton. Reduced zooplankton allows phytoplankton to increase, shading out periphyton (the vegetative food source for frog tadpoles), so tadpole growth is limited. Would a decrease in leopard frog population size following addition of the insecticide be due to top- down or bottom up control?
Top-down
Bottom-up
Answer:
Bottom-up
Explanation:
The bottom approach is one that focuses on the lower orders systems to gives rise to the more complex systems and subsystems. In terms of the ecology, this principle refers to the lower or bottom nutrient levels and depends on the productivity and the primary producers that dominate the structures of the ecosystem. An example of this is the Bio-magnification that increases as we go higher in the food web chain. Thus the leopard frogs and development of the tadpoles are affected and impacted by the reduced zooplankton growth.What is a homologous structure?
A. same function, different anatomy
B. same anatomy, different function
C. same function and anatomy
D. different function and anatomy
Answer:
B. Same anatomy, different function
Explanation:
Answer:
D. Different function and anatomy
Explanation:
Homologous structures show that the organism had a common ancestor but they do not have to look the same or have the same function.
Explain the sequence of geological events that could link rising temperatures to more rockfalls.
Answer:
Expansion and contraction of rocks
Explanation:
As the temperature increases the rocks will expand as per law of science. When night falls the rocks will cool and contract. The smaller differences in daytime and nighttime temperatures are not enough to cause any significant changes. However, with increasing daytime temperatures and decreasing nighttime temperatures, the temperature difference is great. This causes, a larger expansion and a tighter contraction. This constant expansion and contraction eventually creates cracks in the rocks that become larger and may propagate deeper into more rocks.
This scenario is also true for changing seasons between winter and summer. Hotter summers and colder winters mimic the expansion and contraction for night and day temperatures.
Constant cracking will eventually lead to weakening of structures and eventual breaking and eventual falls. This is a dangerous occurrence for animals and people in these areas and caution must be observed for "falling rocks".
The __________________ refers to the sourcing of goods and services from locations around the globe to take advantage of national differences in the cost and quality of factors such as labor, energy, land, and capital.
globalization of markets
augmentation of products
globalization of production
capitalization of markets
Answer:
I believe the answer is Globalization of production
Explanation:
Which statement best summarizes the greenhouse effect? A. After absorbing solar energy, Earth’s surface is not able to reemit the solar energy all the way back to space. B. After absorbing solar energy, Earth’s surface emits long-wave radiation, which is absorbed by water vapor, carbon dioxide, and other trace gases in the atmosphere. These gases in turn emit some of the energy back down to Earth. C. After absorbing solar energy, Earth’s surface emits long-wave radiation, which is absorbed by the ozone layer, permanently trapping this energy within Earth’s atmosphere. D. After absorbing solar energy, Earth’s surface emits long-wave radiation, which is absorbed by water vapor, carbon dioxide, and other trace gases in the atmosphere, trapping the solar energy within the atmosphere.
Answer: B. After absorbing solar energy, Earth's surface emits long-wave radiation, which is absorbed by water vapor, carbon dioxide, and other trace gases in the atmosphere. These gases, in turn, emit some of the energy back down to Earth.
Explanation: The greenhouse effect is defined as when the Earth's atmosphere becomes thick with gases and substances which trap the sun's radiation, making the Earth warmer. An example of the greenhouse effect is global warming. It is a process by which plants are able to grow well in a warm, enclosed structure. It is a process by which greenhouse gases block the sun's light to penetrate the atmosphere.
Answer: Earth's surface absorbs and re-emits equal amounts of energy.
Explanation: