Answer: Ethic groups
Explanation:
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.
Which statement describes the Milky Way galaxy and Earth's position in it?
Earth is placed in one of the spiral hands of the Milky Way (referred to as the Orion Arm) which lies approximately two-thirds of the manner out from the middle of the Galaxy. Hence, Option C is the correct choice.
What is Milky Way Galaxy?The Milky Way is the galaxy that consists of our Solar System, with the call describing the galaxy's look from Earth: a hazy band of mild visible withinside the night sky shaped from stars that cannot be in my opinion outstanding via way of means of the bare eye.
The missing information in the question is:
A. It has a central core surrounded by a spherical halo of stars, and
Earth is inside the core.
B. It has a central core surrounded by a spherical halo of stars, and
Earth is in the halo.
C. It has a central core around which its spiral arms spin, and Earth is
in one of those arms.
D. It has a central core around which its spiral arms spin, and Earth is
inside the core.
Hence, Option C is the correct choice that Milky Way Galaxy has a central core around which its spiral arms spin, and Earth is in one of those arms.
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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
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
Which diagram best represents the tilt of Earth's axis in December?
N
Sun's
rays
Sun's
rays
Sun's
rays
Sun's
rays
o
EN
s
(2)
(3)
1
Diagram #1
2.
Diagram #2
3.
Diagram #3
4.
Diagram #4
there aren't any diagrams included
Day and night are caused by the Earth’s __________.
A.
biosphere
B.
rotation
C.
revolution
D.
atmosphere
Please select the best answer from the choices provided
A
B
C
D
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:
use the diagram of circle C to complete
the problem
questions
1)diameter
2)secant line
3)secant segment
4)exterior part of secant segment
options (all with the line over it)
QW
VS
PW
CR
PW ( with the arrows)
UT
Answer/Explanation:
✔️Diameter of a circle divides the circle into two equal halves. Therefore, diameter => [tex] \overline{VS} [/tex]
✔️Secant line intersects a circle at any two points of the curve of the circle. Therefore, secant line => [tex] \overline{PW} [/tex]
✔️Secant Segment is [tex] \overline{QW} [/tex] and/or [tex] \overline{QP} [/tex]
✔️Exterior part of secant segment lies outside the circle.
Therefore, exterior part of secant segment of the circle => [tex] \overline{QW} [/tex]
Answer:
VS, PW with the arrows, PW without arrows, QW
Explanation:
1. diameter VS
2. secant line PW
3. secant segment PW
4. exterior part of secant segment QW
Describe the role of forest cover in retaining the ground water
Using this chart, which country is MOST likely to have the highest standard of living?
A) Kenya
B) Sudan
C) Nigeria
D) South Africa
Answer:
D
Explanation:
south Africa should have the highest standard of living
The country that is most likely to have the highest standard of living is South Africa.
What determines a standard of living?There is a correlation between education literacy and high standard of living because good education leads to a better overall economy.
Because South Africa have the highest education literacy, then, it is the country that that is most likely to have the highest standard of living among the others.
Therefore, the Option D is correct.
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What is the difference between composition and texture?
Answer:
See explanation.
Explanation:
Composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock (the two are obviously related). Texture refers to the size and arrangement of the minerals or grains that make up a rock.
In \triangle EFG,△EFG, \overline{GE}\cong \overline{FG} GE ≅ FG and \text{m}\angle F = 55^{\circ}.M∠F=55 Find \text{m}\angle E.M∠E
Answer: [tex]\text{m}\angle E=55^{\circ}[/tex].
Explanation:
We are given that,
In △EFG,
[tex]\overline{GE}\cong \overline{FG}[/tex]
[tex]\text{m}\angle F = 55^{\circ}[/tex]
To find: [tex]\text{m}\angle E[/tex]
As we know that, angles opposite to the congruent sides of a triangle are congruent.
Thus, In △EFG
if [tex]\overline{GE}\cong \overline{FG}[/tex] and [tex]\text{m}\angle F = 55^{\circ}[/tex]
then it implies [tex]\text{m}\angle F =\text{m}\angle E= 55^{\circ}[/tex]
Hence, we get [tex]\text{m}\angle E=55^{\circ}[/tex].
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
what is the biggest volcano on earth?
Answer:
The Mauna Loa's in Hawaii.
Explanation:
The Mauna Loa is at least 4 kilometres (Or 2.5 miles) tall. But that is only above sea level. When you descend to the ocean floor, the volcano is more than 5 kilometres (3 miles) tall.
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Have a great summer :)
geometry geometry geometry geometry geometry geometry geometry geometry HELP ME PLS
Answer:
13) B. -3
14) B. 3/5
15) A. 1/5
16) A. -8
17) A. 2/5
18) A. 9/4
Explanation:
I hope this is correct, if not then please feel free to let me know. I'm sorry in advance if it is wrong.
Answer:
13) B.
14) B.
15) A.
16) A
17) A.
18) A.
Explanation:I haven't done this in a while sorry if im wrong
A bench mark can indicate.......on a map
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.
8. Recall that this is what a compass would look like if you were orienting yourself to the northwest. If you wanted to go southeast, how would the compass be positioned? Draw your answer below. (15 points)
Answer:
its in Wikipedia go type south east to north west
Explanation:
its actually kind of a angle from in between north and west and also in between south and eastb
If a person wanted to go southeast, the magnetic needle of the compass would be positioned between south and east.
What is a Compass?
A compass is a machine or a device that depicts the cardinal directions that are essential for navigation.
Simply put, it is used for finding direction. See the attached image for a compass that is pointing between the south and the east.
Learn more about compass at:
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How did physical geography impact the Arctic Inuit?
Who was the first president in Indonesia?
Answer:
Sukarno
Explanation:
I don't know his full name tho
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
4) Escriba los modificadores directos de las siguientes oraciones en el recuadro. El perro café es muy travieso La coleccionista hermosa nos hizo una rebaja El joven galán recibió un gran premio por su papel El niño travieso busca a sus padres
Answer:
Morenas, guapas, jóvenes, grandes y traviesas son modificadores directos.
Explicación:
En estas frases, Brown, bella, joven, grande y traviesa son modificadores directos. En las oraciones, el perro es modificado por marrón, el coleccionista es modificado por bello, el galán es modificado por joven, el premio es modificado por grande y el niño es modificado por travieso. Un modificador es una palabra, frase o cláusula que modifica o da información sobre otra palabra que está presente en la misma oración.
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 province/territory has the highest population density? Why do you think this is so?
Answer:
Prince Edward Island
Prince Edward Island is the most densely populated province in Canada. Canada is the second largest country in the world after Russia.
...
Canadian Provinces and Territories by Population Density.
Rank Province/Territory Population Density (People/Km Sq)
1 Prince Edward Island 24.7
2 Nova Scotia 17.4
3 Ontario 14.1
4 New Brunswick 10.5
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
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.
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Hellllllllpppppppppppppppppp
Which of the following is a possible negative consequence of globalization?
A. Powerful nations gain advantages over the less powerful
B. Cultural exchange of ideas and information
C. Increased equality among developed and developing nations
D. Advances in communication and transportation technology
What major problem in Sub-Saharan Africa is being described?
A) causes of Colonialism
B) major causes of poverty
C) major effects of disease
D) major effects of the Cold War
Answer:
I think c
Explanation:
Without access to medicines, Africans are susceptible to the three big killer diseases on the continent: malaria, tuberculosis and HIV/AIDS.
The problem of Sub-Saharan Africa that is being described above is B) major causes of poverty.
Why is Sub-Saharan Africa so poor?The Sub-Saharan region of Africa has several problems which have hampered development and left the region poorer as a result.
Some of those problems include inadequate access to physical assets amd destruction of natural resources that can help in development.
Find out more on problems in Sub Saharan Africa at https://brainly.com/question/9496736.
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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.
