I if a radioactive material has a 10 year half-life, how much of a 100 g sample will be left after 20 years?


A. 50g
B. 6.25g
C. 12.50g
D 25g​

Answers

Answer 1
I believe the answer to your question is C) 12.50g.

Since it has a half life of 10 years and the question asks for 30 years all you need to do is divide 100 in half 3 times.

Hope this helps!! :))

Related Questions

the chemical reactions that release energy from tour food are called your​

Answers

Answer:

Explanation:

The source of the energy required to regenerate ATP is the chemical energy stored in food (e.g. glucose). The cellular process of releasing energy from food through a series of enzyme-controlled reactions is called respiration . Some of the energy released is used to produce ATP.

whitchbof the following is a function of nucleic acids

Answers

Answer:

To store and transmit genetic information.

They give instructions for proteins.

Explanation:

What are the very large molecules found in cells called?

Answers

Answer:

Ain’t it food

Explanation:

Do you mean macromolecules?

Which pair includes a phase of the cell cycle and a cellular process that
occurs during that phase?

Answers

Answer:

m phase cell growth

Explanation:

The __ horizon has smaller rock and mineral particles than other layers. A. a horizon B. b horizon C. c horizon D. d horizon

Answers

Answer:

......................................................b

Explanation:

Answer: The answer is A

Explanation: I just did the test, I hope this helps. Have a good day!:)

Extrusions are formed by cooling magma beneath Earth's surface.
Please select the best answer from the choices provided

T
F

Answers

False

I took the test.

Answer:

f

Explanation:

What is the purpose of using genetic engineering to develop edible vaccines?

Answers

Answer: to prevent widespread diseases in developing countries without using syringes

Explanation: to create vaccines that are capable of lasting years in the body to prevent future infections

to diminish negative side effects that may occur from administering vaccines with syringes

i need help of you don't help me..................YOU"LL SEE :)

Answers

I’m pretty sure it’s vertebrae

John is an engineer at a factory. He installs settling chambers to control the pollutants produced by the factory
Which pollutant is he trying to manage?
A)
ozone
B)
particulates
c)
lead
D)
hydrogen sulfide

Answers

Answer:

B. Particulates

Explanation:

Factory emissions contribute greatly to the release of carbon dioxide into the atmosphere and black carbon belongs to a class of air pollutants called particulate matter.

Answer:b

Explanation:

edge

Please help I would greatly appreciate it

Answers

Answer:

Ice is less dense than water

Explanation:

Whenever a substance floats on top of another it has to be less dense.

Which of the following are the same on homologous chromosomes? Select all that apply.

Answers

Answer:

Which statement describes Mendel’s hypotheses regarding gametes?

A gamete can carry multiple alleles for a trait.

Explanation:

Which statement describes Mendel’s hypotheses regarding gametes?

A gamete carries two genes for a trait.

A gamete carries one allele for a gene.

A gamete can carry multiple alleles for a trait.

Some gametes are dominant and some are recessive.

PLEASE HELP QUICK!!!!!! WILL GIVE BRAINIEST!!!!!!!

Answers

Answer:

ask someone smart

Explanation:

not me tho-

ahjskdagsduygauysdg

what factors can increase the speed of a ball rolling down hill?
A) increase potential energy
B) increase kinetic energy
C) both A and B​

Answers

Answer: I think it’s C.

Explanation:

The image below shows a river at the bottom of a valley with several rock layers exposed.
The rock layers of this river valley were most likely exposed by which of the following?

Answers

Answer:

erosion and deposition

Explanation:

it’s honestly obvious.

What is the purpose of the plasma membrane?


makes food for the cell


reproduces cells


encloses specific structures


keeps the cell small

Answers

I think it enclosed specific structures it also protects the cell.

which area of the North American continent would have the greatest risk of earthquake damage?

Answers

Answer:

The area is California.

Explanation:

There are 500,000 seismic tremors occurring out of which most of them are in the California zone. Over 80% of seismic tremors happen in a territory known as the Pacific Ring of Fire, a 25,000-mile horseshoe shape along the north side of the Pacific Ocean.  

The principle purpose behind the distinction is that the California coast is directly over the limit of two of the structural plates that make up the Earth's covering.  

Earth's covering, the lithosphere, is separated into in excess of twelve strong plates that buoy over a progressively gooey layer of hot shake.  

In California, plates are granulating against one another. Envision striking two blocks against each other, often as possible reason them to split, perhaps severing lumps. As increasingly more weight is included, the block is probably going to break someplace in the center.

Which diagram shows magnets that will attract each other?



Answers

Answer:

D (fourth one)

Explanation:

since N and S attract (opposites attract)

Answer:

D

Explanation:

i jus did the assignment

HELP ASAP YOU WILL GET 10 POINTS


How many net molecules of ATP are produced by gycolyisis or anerobic respiration?

A.2

B. 32

C. 1

D.4

Answers

Answer:

2

Explanation:

Answer:

The answer is A. 2

Explanation:

In anaerobic conditions, pyruvate converts to lactate through anaerobic glycolysis. Anaerobic respiration results in the production of 2 ATP molecules.

How is it that every living organism has specialized cells that contain genetic material made up of only four different bases, yet every organism is different?

Answers

Answer:

See the answer below

Explanation:

The answer lies mainly in the genetic codes which are translated differently in different organisms.

The genetic code degenerates such that 64 possible codons from the four bases ([tex]4^3[/tex]) codes for the 20 amino acids that are available in nature. The transfer RNA is primarily responsible for the translation of the genetic codes and different organisms have different transfer RNA. Hence, the same genetic codes are differently translated in different organisms and this ensures that organisms are different.

What is another word for input and output?

Answers

Answer:

domain and range

Explanation:

domain= x-values

range= y values

Is the formula balanced as written? Why or why not?

Answers

Answer:

The formula is balanced as written because it should be equal on both sides.

Explanation:

can a unicellular organism get diabetes

Answers

Answer:

I don't think unicellular organisms can get diabetes.

Explanation:

Due to their small size, they are simpler to adjust to environmental changes like heat and cold. Unable to expand much. They are unambiguous organisms and may reproduce swiftly.

What disease causing agents in unicellular organism?

Bacteria, protists, fungus, algae, and other unicellular organisms are all susceptible to attack by viruses.

When a bacterium is infected, a virus called a bacteriophage, which is smaller than the bacterium and uses it as a host during the T4 cycle to reproduce and flourish, is responsible.

Therefore, unicellular organism get infected with pathogen like virus but having less chance to get disease like diabetes.

Learn more about unicellular organism here:

https://brainly.com/question/15299967

#SPJ1

The graph here shows information about three different populations. What does this survivorship curve indicate about frogs?

Answers

Answer:

the real answer is have a high birthrate

Explanation:

The diagram attached shows the X chromosomes in a female fruit fly and the X and Y chromosomes in a male fruit fly. The two fruit flies are crossed with each other. Fill in the two chromosomes illustrating the female offspring of the fruit flies.

Answers

Answer:

See image attached.

Explanation:

We can differentiate the X chromosomes by calling the X chromosomes from the female [tex]X^f[/tex] and the X chromosome from the male [tex]X^m[/tex].

Then, we can take these pairs of chromosomes and cross them over in a Punnett square to find the possible offspring chromosome pairs.

We have for the female fruit fly:

[tex]X^f X^f[/tex]

We have for the male fruit fly:

[tex]X^m Y[/tex]

Create a Punnett square with the female's chromosomes on top and the male's chromosomes on the left.

[tex]\begin{array}{c|c|c|} \multicolumn{1}{c}{} & \multicolumn{1}{c}{\textbf{X}^\textbf{f}} & \multicolumn{1}{c}{\textbf{X}^\textbf{f}} \\ \cline{2-3} \textbf{X}^\textbf{m} & \text{X}^\text{f} \text{X}^\text{m} & \text{X}^\text{f} \text{X}^\text{m} \\ \cline{2-3} \textbf{Y} & \text{X}^\text{f} \text{Y} & \text{X}^\text{f} \text{Y} \\ \cline{2-3}\end{array}[/tex]

After crossing over, we can see that there are two pairs of chromosomes inside the Punnett square.

These are the possible combinations of chromosomes for the offspring of the male and female fruit fly.

Using previous knowledge, we know that females have two X chromosomes and males have one X and one Y chromosome.

Since the question wants the chromosomes for the female offspring, we will use the two X chromosomes: [tex]$X^f X^m[/tex].

The female chromosomes have two bold lines, as shown in the diagram. The male X chromosome has 2 skinny lines.

Therefore, when filling the chromosomes that illustrate the female offspring, we will fill the left chromosome ([tex]X^f[/tex]) with two bold lines, and the right chromosome ([tex]X^m[/tex]) with two skinny lines.

Attached is an image of what the chromosome pair for the female offspring should look like.

[tex] {x}^{m} and \: x {}^{f} are \: the \: answers.[/tex]

A cell is placed in an isotonic solution. How does the cell maintain homeostasis in this environment?
A.) there is no movement of water molecules into or out of the cell
B.) Water will move across the cell membrane to the outside
C.) water will move across the cell membrane to the inside
D.) water will move across the cell membrane in both directions maintaining equilibrium.
PLEASE HELP ME!!! PLEASE AND THANK YOU!​

Answers

Answer:

C

Explanation:

Because of meiosis and mitosis, the water will move across the cell membrane to the inside of the cell.

What influences electrical conductivity?

Answers

Answer:

Electrical conductivity of earth materials is influenced by the metal content (sulfides) in the rock, porosity, clay content, permeability, and degree of pore saturation.

A study shows that a new pesticide is safe for use on food crops. The researcher who conducted
the study works for the pesticide company. What potential biases may have affected the study?

Answers

Answer:

Funding Bias

Explanation:

Funding Bias or Funding Outcome Bias refers to the tendancy of a scientific study or research to support the interests of the study's financial sponsor.

The potential that biases may have affected the study is the researcher most likely left out other data that might have supported that the pesticide wasn't safe on food crops.

What are pesticides?

Pesticides are chemicals that are used in crops to remove or kill insects that feed on crops or impact the crops. These pesticides are made up of harmful chemicals, so they also impact the crops and the organism that eat the crops.

Here, the study is showing the adverse effect of pesticides, which could show by the proven effect on organisms in the experiment.

Thus, the researcher most certainly omitted further data that could have provided evidence that the pesticide wasn't safe for use on food crops, raising the possibility that biases may have skewed the study.

To learn more about pesticides, refer to the link:

https://brainly.com/question/27335883

#SPJ2

What needs to happen for dominant traits to be observed in an organism?

Answers

Answer:

The organism's parents have to either be heterogeneous dominant or homogeneous.

Explanation:

When the traits get passed down they either have to have 2 dominant traits or a mix.

3. Now let's talk about dragons! Given the phenotype (traits) of a dragon, what are the
possible genotypes?
Hagrid has an illegal Norwegian Ridgeback baby living in his hut. His name is Norbert. He has
brown scales, yellow eyes, and orange fire. Brown scales (S) are dominant to white scales (s),
and orange fire (F) is dominant to blue fire (1).
What possible genotype(s) could Norbert have?

Answers

Answer:

Ss or SS (for scales), Ff FF (for fire)

Explanation:

hope this helps! (I'm actually learning about this right now!)

. It's very rare for someone with two X chromosomes to have DMD. Explain how a person with two X chromosomes could have the symptoms of DMD using what you know about inheritance and random mutation.

Answers

Answer: Duchenne muscular dystrophy (DMD) is inherited through X-linked recessive inheritance mode. It is characterized by muscle weakness which mostly affect boys. It can only affect girls when a female carrier got married to affected male.

Explanation: In the union between a carrier female and an affected male, four types of gametes will be produced as shown in the attached image. After fertilization, the resulting offsprings will consist of female carrier, normal male, female affected and male affected each with 25% probability. See attached image for better illustration.

X-linked recessive traits have the following characteristics;

1. More males are affected than females.

2. Approximately ½ of a carrier mother's sons are affected.

3. It is never passed from father to son.

4. All daughters of affected fathers are carrier.

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