Rock Layer E is 250,000 years old. Rock Layer C is 200,000 years old. Rock layer C has not undergone radioactive decay and has 18 radioactive isotopes. The half-life is 50,000 years. Rock Layer E has undergone radioactive decay ONCE, how many daughter and parent isotopes are present in layer E?
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.
One environmental consequence of the large-scale cultivation of cotton in the South was widespread soil exhaustion caused by decades of farming widespread soil exhaustion caused by decades of farming drought caused by overuse of river water to irrigate farmland drought caused by overuse of river water to irrigate farmland air pollution cause by the use of cotton gins air pollution cause by the use of cotton gins widespread water contamination caused by fertilizer runoff
Answer:
Widespread soil exhaustion caused by decades of farming.
Explanation:
The agricultural lands of the south were extensively exploited with intensive cotton cultivation. This cultivation lasted for decades and was developed with agricultural techniques that were not concerned with sustainability. As a result, the southern soil was severely depleted. Soil exhaustion refers to the extreme reduction of organic matter. In the case of southern soils, the intensive use of the soil with cotton planting was the main cause of this exhaustion, however inadequate irrigation practices, mechanization of the soil, deforestation and burning can cause the same effect.
To avoid this, farmers in the south should have adopted practices that are more beneficial to the environment, in addition to promoting crop rotation.
What reasons did this group of people have for migrating to Pakistan? State at least 2 pull and 2 push factors for their Migration.
Answer:
Common ideology and religion.
Explanation:
The main reasons for this group of people have for migrating to Pakistan is the presence of common ideology and same religion of people. Millions of people migrated to Pakistan when the Pakistan was formed because of the worse behaviour of Hindus in India with these people due to their Muslim identity. The presence of Muslims, common ideology and worst attitude of Hindus attracts these people to migrate to Pakistan in order to live a peaceful life.
When two plates of unequal density come together at a convergent boundary, what can result? Mid-Atlantic Ridge conduction zone subduction zone rift valley
Answer:
If they are of unequal density, one plate usually sinks beneath the other in a subduction zone. The western coast of South America and the Himalayan Mountains are convergent plate boundaries. Also called active margin collision zone See more at tectonic boundary.
Explanation:
Go to Dictionary .com
How do astronomers recognize regions in the night sky? *
A. by using constellations
B. by measuring apparent brightness
C. by using the Doppler shift of galaxies
D. by using naked-eye astronomy methods
What is the climate seen throughout most of Canada?
Answer:
The northern two-thirds of the country has a climate similar to that of northern Scandinavia, with very cold winters and short, cool summers. The central southern area of the interior plains has a typical continental climate—very cold winters, hot summers, and relatively sparse precipitation.
What describes how the visible energy from the sun is different from the non visible energy
There is no fundamental difference between visible light and invisible light such as radio waves and X rays. They are all electromagnetic waves that differ in only one way: their wavelength. ... Ultraviolet light, X rays, and gamma rays all have shorter wavelengths than visible light.
rgeregegregerrtertergre
Answer:
gfkhghghghghjk
Explanation:
Answer:
what the ****
Explanation:
please mark this answer as brainliest
How does river originate from mountain? Describe briefly.
Answer:
Most rivers begin life as a tiny stream running down a mountain slope. They are fed by melting snow and ice, or by rainwater running off the land. The water follows cracks and folds in the land as it flows downhill. Small streams meet and join together, growing larger and larger until the flow can be called a river.Explanation:
OMG CAN SOMEONE JUST PLEASE HELP ME...
Answer:
I got you!
Brahmins --> Priests
Kshatryia --> Kings
Vaishya --> Artists
Sudra --> Farmers
Further info can be found here: https://brainly.com/question/19382789?referrer=searchResults
__________________________________________________________
Hope this helps!
Please mark Brainliest!
Which current has a cooling effect on the climate of the west coast of South America?
(1) Falkland Current
(2) Peru Current
(3) Benguela Current
(4) Brazil Current
The difference between the Sahara and the Sahel is thatA) The Sahel is wetter. B) The Sahel is bigger. C) The Sahara is more populated. D) The Sahara is in the United States.
Answer:A
Explanation:C
Suppose a new volcano suddenly formed in the middle of the United States.
1. What most likely caused the formation of this volcano?
2. Would you expect it to be composite, shield, or cinder cone volcano? Explain your reasoning.
(Sorry if this is the wrong subject. I wasn't sure what to put it under)
1 tectonic plates
2 I think composite but I'm not shur.
PLEASE HELP ASAP IM TAKING A TEST PLSPLS I WILL GIVE BRAINLIEST
What special physical property of the upper mantle supports the Theory of Plate Tectonics?
Lithosphere
The lithosphere is the solid, outer part of the Earth, extending to a depth of about 100 kilometers (62 miles). The lithosphere includes both the crust and the brittle upper portion of the mantle. The lithosphere is both the coolest and the most rigid of Earth’s layers.
f(x)=3.2x
h(×)=2x-7.
h(f(2))
Answer:
h =2 x=b
Explanation:
h f =2x=b
Why do Indian workers want IT jobs?
Answer:
They tend to be smarter at it.
Where does the transpiration take place in the water cycle
Describe how producers, consumers, and decomposers are linked in a food chain or food web? PLSSSSSSSSSSSSSSSSSSS HELP I RLLLLLLLLLLLLLLY NEEEEEED EM ANSWERS ITS LITERALY 15 POINTTTTTTSSS
Hourly Weather-Gainesville, TX
As of 9:09 am CDT\
BAD WEATHERRRR TODAYYYY
Friday, April 9
9:00 am
67°
Mostly Cloudy
12%
SE 12 mph
Feels Like
67°
Wind
SE 12 mph
Humidity
85%
UV Index
1 of 10
9:30 am
68°
Mostly Cloudy
10%
SE 13 mph
9:45 am
69°
Mostly Cloudy
9%
SSE 14 mph
10:00 am
69°
Mostly Cloudy
8%
SSE 15 mph
10:00 am
69°
Mostly Cloudy
8%
SSE 15 mph
Feels Like
69°
Wind
SSE 15 mph
Humidity
80%
UV Index
2 of 10
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11:00 am
71°
Mostly Cloudy
6%
SSE 17 mph
12:00 pm
73°
Mostly Cloudy
4%
SSE 16 mph
1:00 pm
76°
Mostly Cloudy
5%
SSE 15 mph
2:00 pm
77°
Mostly Cloudy
5%
SSE 14 mph
3:00 pm
78°
Partly Cloudy
6%
SSE 12 mph
4:00 pm
81°
Partly Cloudy
15%
SSE 10 mph
5:00 pm
81°
Partly Cloudy
14%
SSE 9 mph
6:00 pm
80°
Isolated Thunderstorms
34%
SSE 8 mph
7:00 pm
76°
Isolated Thunderstorms
34%
NW 6 mph
8:00 pm
73°
Isolated Thunderstorms
33%
NNW 8 mph
9:00 pm
69°
Clear
8%
NNW 17 mph
10:00 pm
66°
Clear/Wind
2%
N 20 mph
11:00 pm
64°
Clear
1%
N 17 mph
Answer:
clear
Explanation:
as
What landforms do you see in Chile?
Are there earthquakes?
How do plate tectonics cause those landforms/events to exist?
Which tectonic plates are involved?
What type of boundary is formed (convergent, divergent, transform)?
PLS HELPP
Answer: (sorry I need to get free answers ad free)
Explanation:
A star is called a what during the stage when it gives off heat and light for the first time.
Answer:
The tremendous heat given off by the nuclear fusion process causes the gas to glow creating a protostar. This is the first step in the evolution of a star. The glowing protostar continues to accumulate mass. ... Once its mass is stabilized, the star is known as a main sequence star.
help
tee RN Eric rich job
Answer:
Doctors search for new medicine
environmental groups leave the forest alone
native Americans preserve the forest
ranchers expand cattle farming
What is a Shah?
a.A religious leader
b.An ayatollah
c.A king
d.A revolutionary
Help pls i dont have time 25. What is the average rainfall for each ecoregion?
26. Based on the highest part of the rainfall average for the ecoregions, which 4 ecoregions
had the highest amount of rain?
Answer:
its c because 7 x 9=90+7=900
Explanation:
your welcome man
do you agree that a countries economy is based on and is boosted up by the abundance of minrals it consists of? support your answer by giving any two reason?
Science spreads throughout our lives. People have used astronomical bodies in the past for many things for many purposes. One thing people paid attention to were eclipses, both solar and lunar. Research what these eclipses meant to people in the past. How did eclipses also help our understanding of space? Please answer this prompt by writing one page.
Answer:
eclipse help in the past by telling how the climate will be and in our understanding it shows how the planet rotate for it to come and meet each others ( and sun )
hope I tried to answer the qn
8. True or false: Emigration occurs when a person enters a country and immigration occurs when
a person leaves a country.
O true
O false
Answer:
False
Explanation:
what happen if china wont be there in the earth ??
Answer:
maybe it was called india!
Explanation:
What does Egypt look like in the map
Answer:
Explanation:
I do not know
Why is canada unable to meet its environmental challenges by itself?
Answer:
Canada should limit fossil fuel use because it is thought to be one major cause of climate change....Canada is unable to meet environmental needs by itself because many of the chemicals that cause acid rain are being created by the US.