Suppose a future astronaut travels to a distance planet around a distant star. They collect rocks for dating the age of the planet and system. The astronaut compares the abundance of a certain radioactive element (half life of element = 500 million years) in the collected rocks to the abundance of the same element in a newly formed rock. They measure that there are 1/16th the number of radioactive atoms in the collected sample. How old is this planet?
a. 8 billion years old.
b. 4 billion years old.
c. 1 billion years old.
d. 2 billion years old.
e. 16 billion years old.
Answer:
The correct option is d
d. 2 billion years old.
Explanation:
The general formula to for the half life on an element is given as:
[tex]N(t)=N_o~ (\frac{1}{2})^{\frac{t}{t(1/2)}}[/tex]
Where
N(t) = Quantity of the substance remaining.
N(o) = Quantity of the substance which was initially present
t = time elapsed
t(1/2) = half life of the substance
In this question, we have to find t using the above formula, where
N(t) = 1/16
N(o) = 1
t(1/2) = 500
Substitute in the given formula:
[tex]1=\frac{1}{16}~ (\frac{1}{2})^{\frac{t}{500}}\\\text{Solve the equation for t}\\t = 2000[/tex]
Hence, the time planet has been into existence, or how old the planet is:
t = 2000 million years
or
t = 2 billion years
What would fossil ages from the geologic timescale and an isotopic age on the granite tell us about the age of the unconformity
Answer:
The unconformity is older than the age assigned to the fossils. The granite is younger than the unconformity.
The unconformity is older than the age given to the fossils, according to the geologic time scale and an isotopic age on the granite. The unconformity is older than the granite.
What are fossils?Any surviving remains, impression, or evidence of a once-living thing from a previous geological epoch is referred to as a fossil. Examples include fossilized bones, shells, exoskeletons, animal or microbe imprints in stone, amber-preserved artifacts, hair, petrified wood, oil, coal, and DNA traces.
Compared to the age given to the fossils, the unconformity is older. fossil data Which of the first living forms on Earth can you name
Therefore, The unconformity is older than the age given to the fossils, according to the geologic time
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it is fact that there are lions in aferica
how can we save environment if we need industry
Answer:
we can save the environment by conserve energy by cutting your utility bills and protecting the environment by switching every bulb in your building
Match each classical empire with a change that happened after its fall.
Answer:
Gupta Empire - People throughout the former empire continued to read Sanskrit literature.
The Gupta Empire adopted Sanskrit as its official court language and as a result most literature including poems and plays were written in Sanskrit. It's use became so widespread that after the decline of the empire in the 6th century AD, Sanskrit continued to be actively used by the people in the area. Even now Sanskrit is recognised as a minority language by the Indian government.
Han Dynasty - The population significantly declined after constant war between three kingdoms.
The Han dynasty of China is generally praised for ushering in a golden age of Chinese reformation that led to expansion and prosperity. The emperors were generally said to be benevolent and the Chinese fared relatively better during this time. When the empire fell however, war engulfed the nation as powerful warlords aimed to occupy the power vacuum left by the Han. 3 mighty kingdoms emerged known as the Wei, Shu, and Wu and they fought a series of wars that devastated China and reduced the population from 50 to 16 million.
Roman Empire - Christianity provided people with a sense of order and purpose amidst the chaos.
Under Constantine the Great, Christianity was made the official religion of the Roman Empire and many were converted. After the Western Roman Empire fell, the barbarian kingdoms that eventually took over parts of the now defunct empire converted to Christianity with Clovis I, king of the Franks being amongst the first to do so. The Pope became a symbol of Authority whom the people looked up to and with his authority was able to provide the region with a sense of order.
Answer: The guy above me is right
Explanation: I had already taken the test but he already wrote all the info so mark him braniliest
Imagine that you live in a coastal community in a region prone to earthquakes; you are a board member of your regional electrical utility. The utility is considering constructing a nuclear power plant 10 miles up the coast from your town. Some of your fellow citizens support the project because it will bring employment to the region and provide a carbon-free source of electricity. However, some residents fear a repeat of the events of 2011 in northeastern Japan if there should be a significant earthquake along one of the onshore or offshore faults.
Required:
List three specific pieces of information that you would insist on obtaining from geologists and other scientists before casting your vote on the project."
Answer:
1. Will power plant building be earthquake proof?
2. Will the chemicals placed in the power plant be enough secure that it does not leak or are prone to any explosion?
3. What are the chances of the site facing an earthquake?
Explanation:
1. Will power plant building be earthquake proof?
The building should be secure for the scientists working there and for the chemicals placed in there, if the site faces an earthquake an earthquake building may collapse and can result in explosions of the chemicals.
2. Will the chemicals placed in the power plant be enough secure that it does not leak or are prone to any explosion?
The chemicals placed in the power plant needs to be secured in a place where no unauthenticated entrance is allowed and if any earthquake hits the chemicals do not spill out or mix up which may result in explosions.
3. What are the chances of the site facing an earthquake?
Having a probability study before constructing a power plant is important, a complete chart should be made which shows the probability of this site hitting earthquake this study may be based on past results.
Which is powered by energy from Earth’s interior?
ocean circulation
weather
erosion
volcanoes
Answer:
c.volcanoes
Explanation:
i just know
Answer:
volcanoes
Explanation:
Earth’s interior is made of layers. The heat that comes from the layers powers the volcanic eruptions.
Town Vegetable Sandwich Nonvegetarian Chicken Sandwich Nonvegetarian Ham Sandwich Nonvegetarian Bacon Sandwich Nonvegetarian Tuna Sandwich Town 1 6.63% 5.42% 7.05% 6.19% 5.91% Town 2 6.84% 7.11% 6.89% 5.69% 6.58% Town 3 5.97% 6.63% 5.72% 5.86% 5.79% Town 4 6.54% 5.86% 6.24% 6.24% 6.33% Total 6.24% 5.77% 6.03% 5.92% 6.27% A. 20.6% B. 25.3% C. 60.3% D. 62.4%
wow sandwichhhhhhhhhhhhh
but what is the question actually??????????
According to the online content article about the Earth’s coastlines, what sculpts the coastline by breaking down rock and delivering sand to beaches? What kind of landform is a depression?
Answer:
don't quoto me
Explanation:
A valley can also be called a “depression” because it is naturally lower than its surroundings.
Hope it helps
According to the online content article about the Earth’s coastlines, what sculpts the coastline by breaking down rock and delivering sand to beaches? = waves
What kind of landform is a depression? = a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms. Erosion-related: Blowout: a depression created by wind erosion typically in either a partially vegetated sand dune ecosystem or dry soils (such as a post-glacial loess environment).
what is the function of the red blood cell
Answer:
The functions of RBC ( Red Blood Cells) are as follows:
It transports oxygen and carbon dioxide between the lungs and all part of the body.The surface of red blood cells absorbs the amino acid and transports them to the cells from alimentary canal.Additional Information:
About RBCRBC stands for Red Blood Cells. They are also called erythrocytes. They are circular, biconcave, disc-shaped and non -nucleated cells. They are formed in red bone marrows and destroyed in the spleen. Their lifespan is very short that is 4 months.
RBC contains an iron pigment called haemoglobin that carries oxygen from place to place in the form of oxyhemoglobin. When haemoglobin is exposed to oxygen, it turns red. So the blood is red in colour. If RBC is less in blood then, a person is suffering from anaemia , as there is not enough haemoglobin to transport oxygen.
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Good luck on your assignment...
Answer:
The functions of RBC ( Red Blood Cells) are as follows:
It transports oxygen and carbon dioxide between the lungs and all part of the body.
The surface of red blood cells absorbs the amino acid and transports them to the cells from alimentary canal.
Explanation:
which air mass is likely to form over Victoria Island in northern Canada and over Greenland in January and what would its characteristics be
Answer:
Continental polar air mass.
Explanation:
The northern parts of Canada are those areas that lie in the arctic circle and covers about 40% of Canada's land area. A total area of 3,535,263 km sq. The air is dry and cold throughout the region. In summer months the temperature is about 7.2 degrees. The continental polar air mass moves don from the polar regions and influences the temperatures of northern America.What are the latitude and longitude of the site? Using background knowledge/basic research, how would you describe the location and geographic characteristics of this site (is it remote or close to large human populations, is it near ocean/land, what is the elevation, etc.)?
Answer: B
Explanation:
please help me with this question someone?
Answer:
Cinder Cone Volcanoes
these are the simplest type of volcano. They occur when particles and blobs of lava are ejected from a volcanic vent. The lava is blown violently into the air, and the pieces rain down around the vent. Over time, this builds up a circular or oval-shaped cone, with a bowl-shaped crater at the top. Cinder cone volcanoes rarely grow larger than about 1,000 feet above their surroundings.
Composite Volcanoes:
Composite volcanoes, or stratovolcanoes make up some of the world’s most memorable mountains: Mount Rainier, Mount Fuji, and Mount Cotopaxi, for example. These volcanoes have a conduit system inside them that channels magma from deep within the Earth to the surface. They can have clusters of vents, with lava breaking through walls, or issuing from fissures on the sides of the mountain. With all this material coming out, they can grow thousands of meters tall. As we’ve seen with the famous Mount Saint Helens, composite volcanoes can explode violently.
Shield Volcanoes:
These are large, broad volcanoes that look like shields from above – hence the name. The lava that pours out of shield volcanoes is thin, so it can travel for great distances down the shallow slopes of the volcano. These volcanos build up slowly over time, with hundreds of eruptions, creating many layers. They’re not likely to explode catastrophically. Perhaps the best known shield volcanoes are the ones that make up the Hawaiian Islands, especially Mauna Loa and Mauna Kea.
Lava Domes:
Volcanic or lava domes are created by small masses of lava which are too viscous (thick) to flow very far. Unlike shield volcanoes, with low-viscosity lava, the magma from volcanic domes just pile up over and around the vent. The dome grows by expansion of the lava within, and the mountain forms from material spilling off the sides of the growing dome. Lava domes can explode violently, releasing a huge amount of hot rock and ash.
Explanation:
The image shows mountains in Alaska. Which describes these mountains? A syncline is visible. An anticline is visible. These mountains show no evidence of folding. These mountains likely formed from normal faults.
Answer:
These mountains likely formed from normal faults I believe.
Explanation:
Please mark me Brainliest! Hope this helps!
Mountains in Alaska likely formed from normal faults. The correct option is D. Massive forces wrinkled and rumpled these terranes northward as the Pacific plate continued to subduct beneath them, resulting in the buckling and uplift of rocks that would later become the Alaska Range.
Why are mountains important to us?As a result of the recognition that mountains are essential to biodiversity protection and sustainable development, many of them have been named UNESCO World Heritage Sites and Biosphere Reserves. 25% of the world's terrestrial biodiversity is found in mountains, which are also home to highly specialized species that can't live anywhere else.
The Denali Fault, which runs along the range's southern flank and is a component of the Pacific Ring of Fire, is to blame for numerous large earthquakes. At the northernmost point of the Aleutian Volcanic Arc, Mount Spurr is a stratovolcano with two vents: the summit and nearby Crater Peak.
Thus, the ideal selection is option D.
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Which of the following countries struggles with language diversity, making it difficult for the government to communicate effectively and educate its population? i. India ii. Japan iii. Pakistan A. i. only B. i. and iii. only C. ii. and iii. only D. i., ii., and iii.
Answer:
The correct answer is B. Both India and Pakistan struggle with language diversity, making it difficult for the government to communicate effectively and educate its population.
Explanation:
Both India and Pakistan are multicultural nations, emerged as a result of different peoples of the Indica peninsula united around a common religion (Hinduism in India and Islam in Pakistan). Therefore, given the cultural differences in non-religious aspects that each country has, and the high population of both nations (1,400,000,000 people in India and 215,000,000 in Pakistan, being the first and fifth most populous nations respectively), both countries tend to create of diverse cultural subgroups that maintain a common language and their own idiosyncrasy.
Thus, India has as official languages English and Hindi, but some 15 other languages are spoken within its territory, among which Bengali, Punjabi, Sanskrit, Tamil and Urdu, among others, stand out.
In turn, Pakistan has English and Urdu as its official languages, but Punjabi, Pashto, Sindhi and Balochi, among others, are also spoken.
Thus, it is clear that both countries do not have a language integrity that allows clear and effective communication among the entire population, which is a clear limitation for education and social stability in both countries.
Answer:
A i. only
Explanation:
Chose B from the idiot above and got it wrong. Correct answer shows to be A.
Read the passage below and use the information to answer the question that follows. Ferdinand Magellan, a Portuguese navigator and sailor who sailed for Spain, was the first European to find a waterway between the Atlantic and Pacific oceans, and sail across the Pacific. He was the first person to lead a voyage completely around the world, proving that the Earth is round. In September 1519, Magellan left from southwestern Spain in command of five ships and a crew of over 250. The expedition sailed across the Atlantic and down the eastern coast of South America. As they sailed, they explored large rivers looking for the waterway that would connect them to the Pacific. When cold weather and winter storms forced them to camp near the southern tip of the continent, Magellan had serious problems to contend with. One of his ships was destroyed while exploring the area. A group of sailors unhappy with the length and danger of the trip attempted to take control of the expedition and return to Spain. Magellan put down this mutiny attempt by force, beheading the leader and leaving other members of the mutiny behind when the expedition continued. In October 1520, over a year after leaving Spain, they discovered the passage to the Pacific—a passage now called the Strait of Magellan. It took over a month to sail through the narrow, cold, stormy strait. During the passage through the strait one of Magellan’s ships deserted and returned to Spain. On November 28, the three remaining ships sailed out of the strait and into the ocean. Magellan named the ocean Pacifico (Pacific) which means peaceful because, compared to the tumultuous strait they had just been through, the ocean was amazingly calm. Since no European had previously crossed the Pacific, Earth’s largest stretch of ocean, Magellan and his crew had no idea how big it was and how long it would be before they would again see land. As they sailed month after month, their situation became desperate. Much of the crew became sick from scurvy, a disease caused by lack of vitamin C. Food supplies were not adequate for such a long voyage and those who not killed by scurvy were reduced to eating rats, shoe leather, and sawdust to survive. After over three months of sailing, Magellan’s expedition arrived in the islands now known as the Philippines. In the several weeks they stayed in the Philippines to recover Magellan and members of his crew became close to the islanders. Magellan converted some to Christianity. In April 1521 Magellan was killed while participating in a battle between rival groups on the island of Mactan. Based on the passage above, what does tumultuous mean? A. rough and uncertain B. calm and peaceful C. fun and exciting D. dull and boring Please select the best answer from the choices provided A B C D
Hey there! I'm happy to help!
Let's see where the word tumultuous is used here:
Magellan named the ocean Pacifico (Pacific) which means peaceful because, compared to the tumultuous strait they had just been through, the ocean was amazingly calm.
We see that they named the ocean the Pacific Ocean because it was very peaceful and calm compared to a tumultuous strait. This shows us that tumultuous is probably the opposite of peaceful. It probably means crazy, hectic, rough, harsh, etc. After going through a crazy thunderstorm, a light sprinkle would seem very peaceful, which is similar to how Magellan probably feels here.
This definition matches best with answer A. rough and uncertain.
Have a wonderful day! :D
Answer: This underlined sentence starts to build tension because
Captain Dall and Will Osten are planning a counterplot which might go wrong
.
Explanation:
Match the definition to the appropriate term: A line in which two plates move in opposite directions from one another. Answer 1 Choose... A line in which one oceanic plate subducts underneath another oceanic plate. Answer 2 Choose... A line in which two plates slide horizontally past each other. Answer 3 Choose... A line in which an an oceanic plate subducts underneath a continental plate. Answer 4 Choose... A line at which a continental collision occurs.
Answers:
- A line in which two plates move in opposite directions from another is known as a divergent plate boundary.
- A line in which one oceanic plate subducts underneath another oceanic plate is called an ocean-ocean convergent plate boundary.
-A line in which two plates slide horizontally past each other is called a transform-fault boundary.
-A line in which an oceanic plate subducts underneath a continental plate is an ocean-continent convergence.
-A line at which a continental collision occurs is known as the continent-continent convergence boundary.
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Which very young geographic feature will look like Kilauea in the most distant future, a few million years from now?
Select one:
a. Kauai
b. Mauna Kea
c. Maui
d. Mauna Loa
e. Lo’ihi
f. O’ahu
Answer:
b. Mauna Kea
Explanation:
Kilauea is an active mountain on Hawaii island and has an elevation of 1,247 meters. Mauna Kea is a dormant volcano on Hawaii island and is the highest point in Hawaii having a peak of 4,207.3 meters. It used to be an active shield volcano and has viscous lava and late volcanism has also given it a rough appearance amount the forever kea is a fourth and active hotspot.Q4 please for a branliest answer
Answer:
q no .5
ans= because as they are found in the shothern part of world where there is alots of rainfall . as there is hot climatic condition , receives more rainfall and due to plain land the waters also gets stored in underground so, they remain evergreeen.
hope it will help u..
what is the largest island in the caribbean
Answer:
Cuba is the largest island in the carribeans
Explanation:
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▹ Answer
Cuba is the largest island in the carribean.
▹ Step-by-Step Explanation
Attached is a map!
Hope this helps!
- CloutAnswers ❁
!
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Explain how, in late winter, with snow covered ground and a southeasterly wind, advection fog could develop at Atlanta’s International Airport (located in the US Southeast, over 200 miles from the ocean) to create low visibility and flight delays.
Answer:
In late winter with snow covered ground and a southeasterly wind advection fog could develop at Atlanta’s International Airport (located in the US Southeast, over 200 miles from the ocean) to create low visibility and flight delays. This is because when warmer air from the ocean moves to the land surfaces where the Atlanta’s International Airport is built on, it comes in contact with it .
When the air cools, the temperature reduces to the dew point temperature. This allows for increase in saturation levels necessary in the production of fogs.
introduction
of,
tourism
and
agriculture
the hall of worship was also known as
Answer:
a religious building, such as a church, temple, synagogue, or mosque
Explanation:
________is a geo-lifestyle segmentation system.
A. Claritas
B. PRIZM
C. SRDS
D. VALS
E. MRI
Answer:
B. PRIZM
Explanation:
PRIZM is a geo-lifestyle segmentation system.
PRIZM organizes its 66 individual segments into social and lifestage groups.
How are interest groups different from political parties?
Answer:
Interest groups do not run for elections while political parties need to run for elections so that they could gain and achieve power.Explanation:
As we know interest groups are groups of individuals who come together to achieve specific goals, they are usually goal-oriented entities that do not have any specific agendas. Whereas political parties are group of individuals who come together with specific party agendas.Interest groups do not run for elections while political parties need to run for elections so that they could gain and achieve power.Also, interest groups may dissolve once their goals are achieved. However, political groups tend to continue for a longer period of time even if they do not win elections.Which of the following is an example of the effect on human life of the
processes within Earth's water system (the hydrosphere)?
Answer:
The hydrosphere provides humans with water. When runoff from precipitation happens, plants and animals can grow and produce food and resources for humans to use.
Explanation:
write a story which ends with the expression.... what a dream
I looked to my left and the right, I do not know where I would turn to. My heart is racing, i feel danger close.
I had noticed the guy on a black hat started following me right from the mall. His scar was noticeable, he looked mean.
After I had gone three blocks and he continued following me, I knew he was up to no good.
I was awoken from my reverie by a sound which made me start in fright. A hand was over my mouth and i was bundled into a van. A handkerchief was put over my nose and i lost consciousness.
Alas! It was just all in my subconscious, what a dream!
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Where is the white house
Answer:
1600 Pennsylvania Avenue NW, Washington, DC 20500, United States
Explanation:
Exact White House address :D
what has amazing mountain landscapes with rapidly melting glaciers, tropical savannas for world-class safaris, beaches, and even deserts.
Answer:
Tanzania is home to Mount Kilimanjaro which is the highest point in Africa.
Explanation:
However, the lower latitudes mean that glaciers and tropical savannas easily fuse. Tanzania is home to some of the most popular national parks and natural attractions in Africa, including the majestic Kilimanjaro Mountain.
Tanzania is a country in East Africa noted for its vast desert areas. They include the Everglades National Park plains, a safari hotbed inhabited by game "big five" (anteater, lion, cheetah, bull, wildebeest), and safari National Park, host to the tallest peak in Africa.
Write a short note on iron and ore
Answer:
Iron and Ores
Explanation:
Iron ores are rocks and minerals from which metallic iron can be economically extracted. ...
Ores containing very high quantities of hematite or magnetite (greater than about 60% iron) are known as "natural ore" or "direct shipping ore", meaning they can be fed directly into iron-making blast furnaces.