Explanation:
During fertilization, the sperm and egg unite in one of the fallopian tubes to form a zygote. Then the zygote travels down the fallopian tube, where it becomes a morula. Once it reaches the uterus, the morula becomes a blastocyst. The blastocyst then burrows into the uterine lining — a process called implantation
Calculate the amount, in grams, of an original 300-gram sample of radioactive isotope Potassium-40 remaining after
3.9 billion years if its half life equals 1.3 x 10^9 years.
Answer:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
Explanation:
The amount of the sample of the radioactive isotope decays exponentially in time, the amount of mass of the sample as a function of time ([tex]m (t)[/tex]), in grams, is described below:
[tex]m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }[/tex] (1)
Where:
[tex]m_{o}[/tex] - Initial mass, in grams.
[tex]t[/tex] - Time, in years.
[tex]\tau[/tex] - Time constant, in years.
The time constant can be found from half life ([tex]t_{1/2}[/tex]), in years, described in statement:
[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (2)
If we know that [tex]m_{o} = 300\,g[/tex], [tex]t = 3.9\times 10^{9}\,yr[/tex] and [tex]t_{1/2} = 1.3\times 10^{9}\,yr[/tex], then the current amount of the sample is:
[tex]\tau = \frac{1.3\times 10^{9}\,yr}{\ln 2}[/tex]
[tex]\tau \approx 1.876\times 10^{9}\,yr[/tex]
[tex]m = (300\,g)\cdot e^{-\frac{3.9\times 10^{9}\,yr}{1.876\times 10^{9}\,yr} }[/tex]
[tex]m\approx 37.521\,g[/tex]
The current amount of the Potassium-40 sample is approximately 37.521 grams.
Describe the role of forest cover in retaining the ground water
what is the role of stars in our galaxy and other galaxies in maintaining accurate navigation in outer space?
Answer:
That's more than 275 million stars per day in the observable universe. Stars keep themselves fueled. They fuse elements together to make new elements. ... Once the star runs out of hydrogen, the helium atoms fuse together to make carbon.
Which event happened first in earths evolution on the geologic time scale?
Describe ONE way how agriculture as a primary sector is linked to the secondary and tertiary sectors
Answer:
One link between the primary sector the secondary sector, and the tertiary sectors, is the production of cotton which are used for the manufacture of clothing material, which are used by the secondary sector to manufacture clothing, and other fabrics, that are used by the tertiary sector for furnishing and trade
Explanation:
The primary sector is the sector that has land as the main input
Therefore, the primary sector includes sectors such as the agricultural sector
The secondary sector, manufactures goods using raw materials for the goods being the produce of the primary sector, including crops such as cocoa, used to produce food drink, corn, barley, millet, and grapes used for making alcoholic beverages, wheat, used for making bread, and cotton
The tertiary sector, which is the service sector, includes the retailing, banking, hotels, restaurants, police, and service industries
Describe how changes in the ladybugs
environment may influence their survival or
reproduction
Answer:
The ability to fly gives ladybugs an advantage for fleeing from danger.
Explanation:
When a ladybug lays her eggs, she chooses an area of her environment rich in food for her young, such as a plant covered in insects. This strategy helps ensure the survival of the young, defenseless offspring .
The ladybug's environment may influence their survival or reproduction, as they lay their egg in a place where there are insects present.
What is reproduction?Reproduction can be defined as the process where a particular species are producing in their offspring. An organism is biologically different because it incorporates the genetic material form both its progenitors.
The ladybug lays an egg, which means that they usually need to lay it in a location where there may be present some kind of insects.
When the eggs hatch and they may need some kind of food to eat so, the ladybugs make sure that they want food. Also, insects are considered as a rich source of food. This eventually makes sure that survival makes it easy. Also, there has a way by which bugs protect themselves.
Learn more about reproduction, here:
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in 2 or 3 senetences describe the swiss goverment
Answer:
Switzerland is a semi-direct democratic federal republic. The Federal Council holds the executive power and is composed of seven power-sharing Federal Councillors elected by the Federal Assembly. The judicial branch is headed by the Federal Supreme Court of Switzerland, whose judges are elected by the Federal Assembly.
Explanation:
Hope this helps
According to Greek mythology, the
was created by Hermes.
A. Aulos
B. Kithara
C. Lyre
D. Lute
Answer:
Lyre
Explanation:
please brainleist my answer
Find the number that makes the ratio equivalent to 12:1.
_:8
Answer:
96.
Explanation:
To find how they got 8, you divide 8 by 1, because they are on the same side of a ratio, and you get 8.
So, to keep the ratio equal, you should multiply 8 by 12 to get the equal ratio.
8 x 12 = 96.
Choose... 90 seconds is equivalent to Choose... minutes. Choose... Choose... And, this fraction multiplied by 5 is Choose... ahh
Answer:
90 seconds is equivalent to choose 1.5 minutes.
Explanation:
There are 60 seconds in 1 minute which means if there are 90 seconds then it will be equivalent to one and a half minute.
which important fossil is most likely to be found in the triassic age rocks in the Newark lowlands? .eurypterid .mastodont .coelophysis .Naples tree
Answer:
Coelophysis is most likely to be found in the triassic age rocks in the Newark lowlands.
A _____ was storyteller in Africa who would be responsible for passing down the history of society orally.
A) anasi
B) griot
C) mansa
D) qanat
Match each type of erosion with its geological impact.
wind
gravity
flowing water
Answer:
Cave in the Grand Canyon - Flowing water
Sand Dunes in the Sahara - Wind
Avalanche in Russia - Gravity
Answer:
the wind goes with the desert and then the Avalache goes with gravity and then cave goes with flowing water
Explanation:
BC the desert gets really windy especially at night and then avalache when it gets to high the gravoty causes it to fall downward and then the caves have water
guys where is london weather office located?
-university of westerns ontario
-police station
-downtown
-airport
-GIVING BRAINLIST FOR RIGHT ANSWER
Answer:
U of W Ontario
Explanation:
I think this is the right answer but I'm not 100.
Lines s and t are perpendicular. If the slope of line s is 5, what is the slope of
line t?
А. -1/5
B. -5
C. 1/5
D. 5
Answer:
-1/5
Explanation:
It is an established mathematical proof that the slope of line A perpendicular to another line B is the recoprovaknofokad
Hence the slope of B = the negative reciprocal of B
Given that ; lines s and t are perpendicular ;
Slope of S = 5 ;
The slope of T = - 1/5
A waxing gibbous phase is ______.
A. between the third quarter and a full moon
B. between the first quarter and a full moon
C. something that happens every other month
D. something that cannot be predicted
Look at The Baptism of Christ, an engraving done by Lucas van Leyden in
1510. Why is the baptism of the adult Jesus hidden in the background?
Answer:
I believe the answer is C
Explanation:
Non required
The reformation made it necessary to push the relgious messages in the art to the background. Hence option C is correct.
What is the Baptism of Christ?As Jesus came to john baptist and was baptizing the people he tried to change his mind but will do all that God requires.
As soon the god that is Jesus was baptist he came out of the water. The image depicts people surrounded by the water and reaffirmation made it necessary for pushing the religious message.
Find out more information about Baptism of christ.
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The first mosque in Great Britain was built in 1889. Today, there are over 1,500 mosques in the country.
Which factor most contributed to this culture change?
Increased trade with Muslim countries
Muslim refugees from war-torn countries
Muslim immigrants from former British colonies
Government efforts to promote religious diversity
Muslim immigrants from former British coloniesAnswer:
1889
The Shah Jahan Mosque at Woking was Britain's first purpose-built mosque. It was established in 1889 by the Jewish ex-Registrar of the University of Punjab, Gottlieb Leitner, with financial backing from the Begum Shah Jahan of Bhopal.
Explanation:
The Shah Jahan Mosque in Woking was the first purpose-built mosque in Britain, and was built in 1889.
Define the term climate change and briefly explain why it is important
Answer:
Climate change is the long-term alteration of temperature and typical weather patterns in a place. Climatic Change is important since it helps determine future climate expectations. Through the use of latitude, one can determine the likelihood of snow and hail reaching the surface. You can also be able to identify the thermal energy from the sun that is accessible to a region.
What are the functions of money?
A medium of exchange
A store of value
A measure of value
Answer:
The functions of money are A medium of exchange, A store of value, and a measure of value.
Explanation:
In conclusion all of them.
→ The gases in Earth's mantle are released during what events?
A bench mark can indicate.......on a map
3. What are the most common languages in North America?
Answer: are English, Spanish, and to a lesser extent French, and especially in the Caribbean, creole languages lexified by them.
Explanation:
Some minerals have special
properties. Which of these is a
special property that not all
minerals have?
C. Radioactivity
Hope this helps! :)
Answer:
radioactivi
Explanation:
i hope u understand
paragraph-how high GDP can affect child mortality
Answer:
The authors found that, on average, a 1% reduction in the per capita GDP implies a 0.24 to 0.40 increase in infant mortality per 1,000 live births. In a more recent study, O’Hare et al.17 found effects of 0.33 for infant mortality and 0.28 for under-five mortality. These results are higher than those observed in the present study, which found an association of approximately 0.12 for infant mortality and 0.10 for under-five mortality rate for the total sample, and 0.15 and 0.14, respectively, for the subsample of low- and middle-income countries. This difference is probably due to the countries included in the sample, as Baird et al.14 and O’Hare et al.17 include only middle- and low-income countries in their analysis, while the present study included countries from the three income strata, with only 14% of the sample consisting of low-income countries. According to Maruthappu et al.6, the effect of economic crises on the health of children under five in the poorest countries is three-fold higher than the effect on children in high-income countries.
Explanation:
Weather is a result of different air masses coming in contact with each other. Use the fronts and pressure systems on the weather map to identify the weather condition that is labeled correctly.
Answer:
Mild weather.
Explanation:
Mild weather is the weather that labeled correctly because the regions nearer to the ocean or sea have mild weather condition. Due to near of water, the coastal regions experiencing warmer winters and cooler summers as compared to regions that are situated far from the ocean or sea. This is a result of ocean temperatures that taking longer to warm up and cool down than the adjacent landmass.
Answer:
mild weather
Explanation:
took the test got it right
BRAINLIETS! BRAINLIEST! BRAINLIEST!
Can someone please write a summary based upon the Middle East and Russia?
Answer:
Since the 1930s the Middle East has emerged as the world's most important source of energy and the key to the stability of the global economy. This tumultuous region produces today 37% of the world's oil and 18% of its gas. When it comes to reserves, the Persian Gulf is king. --> MIDDLE EAST.
Russia, country that stretches over a vast expanse of eastern Europe and northern Asia. Once the preeminent republic of the Union of Soviet Socialist Republics (U.S.S.R.; commonly known as the Soviet Union), Russia became an independent country after the dissolution of the Soviet Union in December 1991. --> RUSSIA
Explanation:
SUMMARY UPDATED:
The middle east may be emerged as one of the most important source of energy to the world but Russia is one of the biggest places in the world although it is an independent country causing there to be more recourses from Russia compared to Middle East! The only difference here is that Middle East has been important since 1930s but Russia became independent form Soviet Union on 1991.
Describe the impact of urban growth on the environment and the problems associated with urban decay.
Answer:
Urban Growth affects animals in such ways as contruction workers tearing down nature and animal habitats to make buildings such as houses and eateries.
Explanation:
what percentage of the earth surface does water occupy?
Answer:
75%-80% percent.........
Kodėl dauguma Australijos miestų įsikūrę pakran-
tėse?
Answer:
trade, travel, ect
Explanation:
The cities are all located by the coast as the coastal areas of Australia are most accessible for trade and travel, have the best climate and leisure activities, and there is enough water available to meet the needs of a large population.
