If a sample contains 100g of a radioactive isotope, how much will be left after 3
half-lives?

Answers

Answer 1

6.25 grams would be your answer b/c as you divide into 3 and as the 3 half lives, I would simplify that also which would give me 6.25

Answer 2
6.25 grams is ur answer

Related Questions

What is a major difference between DNA replication and DNA transcription?
A. RNA molecules produced by transcription are much shorter in length than DNA molecules produced by replication.
B. DNA replication involves the nitrogenous base uracil, while DNA transcription involves the nitrogenous base thymine.
C. DNA transcription only occurs in multicellular organisms, while DNA replication occurs in all organisms.
D. DNA replication takes place in the nucleus, while DNA transcription takes place in the cytoplasm.

Answers

Answer: Your answer is A

Explanation: I just took the test

the answer is a. hope this helps!

how can pioneer species benefit the whole biological community?

Answers

Explanation:

"Over hundreds of years these “pioneer species” convert the rock into soil that can support simple plants such as grasses. These grasses further modify the soil, which is then colonized by other types of plants. Each successive stage modifies the habitat by altering the amount of shade and the composition of the soil."

7.) DURING THE FIRST ERA, THE __________ ORGANISMS EVER ON EARTH WERE
ERA, THE FIRST LIVING

Answers

Answer:

The first living organism on Earth are Bacteria in the first era.

Explanation:

Bacteria are the first organism to leave be on Earth. They came into existence about 3.5 billion years in the first era in the waters of small oceans. Then there were anaerobic hetetrophic bacteria because the atmosphere was free of oxygen before. Cyanobacteria then became the first autotrophic organisms and first photosynthesizer that release oxygen to the atmosphere after photosynthesis.

how does Pteromyzon differ from scolidon and labeo fishes?
who answer this question in 10 seconds I'll mark his or her ans. as "BRAINLIST ANSWER"
It's my promise but the answer must not be copied from internet​

Answers

Answer:

Due to agnathous, no paired fins and scales.

Explanation:

Pteromyzon fish is different from scolidon and labeo fishes because Pteromyzon fish is not a true fish. The main reason for this is that Pteromyzon fish is agnathous means having no jaws and it doesn't have paired fins and scales on their body while all these features are present on the body of  scolidon and labeo fishes so we can conclude from this discussion that Pteromyzon fish is different from scolidon and labeo fishes.

What do living things need to live and grow?

Answers

Answer:

All living things need some form of water. Most need oxygen.

Explanation:

9.Supposed 100 ants live in an & square cenoneter cs: pot gasswould be the population density of the ants?
A.12.5 per cm²
B.12.6 per cm²
C.12.7 per cm²
D.12.8 per cm²​

Answers

The answer is A-12.5 per cm

How does biology affect behavior?

Answers

Answer:

some behaviors may have a genetic basis, but genes do not actually control behavior. Rather, our genetic makeup influences how we interact with and respond to our surroundings.

Explanation:

There you go

Biology is a normal thing it diesnt really effect us

what is the difference between climate and wheather

Answers

Answer:

Weather reflects short-term conditions of the atmosphere while climate is the average daily weather for an extended period of time at a certain location.

:P

Which of the following processes provides the link between solar energy and multi-cellular life on earth?

Answers

Answer:

Out of "the", "following", and "processes" The answer is simply solar energy to life "Processes"

Explanation:

A moth population living in a deciduous forest relies on camouflage to protect itself from predators. These moths typically vary in
color and are thus able to camouflage among both the light and dark-colored trees of the forest. However, as soot emitted from
nearby factories darkens the forests trees, the moth population begins to evolve. Which of the following distribution graphs best
represents the evolution of this moth population?

Answers

The distribution of graph A best represents the evolution of this moth population.

What do you mean by Evolution?

Evolution is defined as the process of growth and development or the theory that organisms have grown and developed from past organisms.

As soot emitted from nearby factories darken the trees of the forest, it is better to camouflage dark to escape from predators. And in this way evolution of the moth population takes place.

Therefore, the distribution of graph A best represents the evolution of this moth population.

To learn more about Moth evolution, refer to the link:

https://brainly.com/question/2050596

If two objects are moving at a constant speed with the same velocity, what will make the
velocity change?

Answers

Answer:

The velocity can change by changing the direction

Explanation:

If the direction changes, then the velocity changes even though the speed is constant. Hope this helps!

Explain how autotrophs need both cellular respiration and photosynthesis

Answers

Answer:

They get energy from food. Autotrophs make their own food through the process of photosynthesis, in which light energy from the sun is changed to chemical energy that is stored in glucose. And as for cellular respiration, all organisms use it to break down glucose, release its energy, and make ATP.

Explanation:

_____________

How do humans generate energy when oxygen is not available?

a. Using Kreb’s Cycle only
b. Using the Electron Transport Chain only
c. Using alcoholic fermentation
d. Using lactic acid fermentation

Answers

When Oxygen is not available, the cell is forced to produce energy (=ATP) through ANAEROBIC processes, that produce much less energy (about 15 times less), than AEROBIC processes. ... The electron transport chain (ETC) allows the cell to produce energy (ATP) by creating a proton gradient across the mitochondrial membrane. So B.

If a sample originally had 120 Adams of carbon 14 how many atoms will remain after 17,190 years

Answers

Answer:

15 atoms

Explanation:

About 15 atoms out of the 120 Adams would remain.

Generally, the half-life of a substance is the time it takes for one-half of that substance to disintegrate.

Carbon 14 has a half-life of approximately 5,730 years. 17,190 years means that the sample had stayed for 17,190/5,730 which is equal to 3 carbon-14 half-lives.

Out of 120 Adams,

the first half-life will reduce 120 to 60 Adamsthe second half-life will reduce 60 Adams to 30 Adamsthe third half-life will reduce 30 Adams to 15 Adams.

Hence, at the end of the 17,190 years, approximately 15 Adams would remain.

Which of the following is a method used to obtain the relative age of a rock or fossil?

a
Decay rates

b
Radiometric dating

c
Superposition

d
Uniformitarianism

i know its not radiometric dating

Answers

Answer:

Radiometric dating

Explanation:

Is a chicken egg biotic (living) or abiotic (non-living)? *
biotic (living)
abiotic (non-living)

Answers

Answer:

its biotic

Explanation:

Chicken egg is biotic.

What are biotic or abiotic components?

Biotic components are living organisms while abiotic components are nonliving organisms. All biotic components are living components of ecosystem. Bacteria and birds, animals  are living components.

Abiotic components are non living components. sunlight, water and temperature are the non living components. Biotic factors are producers, herbivores and omnivores.

Abiotic components are physical and chemical components that act on the living components. In chicken cell the yolk which is living cells.

Biotic components also include the waste from living things and dead organisms. Earth have many biotic components. The surface of Mars has no biotic components.

Therefore, Chicken egg is biotic.

To learn more about biotic components, refer to the link:

https://brainly.com/question/18686232

#SPJ2

What happens to the cells at the edges of an injury when a cut in the skin or a break in a
bone occurs?

Answers

Explanation:

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When an injury such as a cut in the skin or a break in a bone occurs, cells at the edges of the injury are stimulated to divide rapidly. This action produces new cells, starting the process of healing.

A cactus with the genotype Kkww is crossed with a cactus with the genotype KKWw. Which of the following genotypes will be shared by 25% of the offspring?
A. KKWW
B. kkWw
C. KKww
D. KkWW

Answers

Answer: C

Explanation: Think of it this way, which ever has the most is what answer would be. So they come across 3 capitals with K its gonna be KK not kk.

Hope this helps

The genotype is defined as the genetic makeup of an organism, or the set of alleles. The cross between Kkww and KKWw will result in 25% of the progeny having genotype KKww.

The correct option is:

Option C. KKww

Find the attachment for the Punnett square, given below.

The cross between Kkww and KKWw will result in the gametes as:

Kkww - Kw, Kw, kw, kwKKWw - KW, Kw, Kw, kw

The progeny having genotype as KKww will be 4 or 25%.

Therefore, Option C is correct.

To know more about cross and Punnett square, refer to the following link:

https://brainly.com/question/14642557

In the experiment, which of the following variables should remain consistent?
the types of plants used
the temperature of the water and vinegar
the type of soil used
All of these choices are correct.

Answers

All of the above is correct

explain in details the mechanism of transportation in plants​

Answers

Answer:

Plant transport systems move energy from leaves and raw materials from roots to all their parts. The xylem (tissue) moves water and minerals obtained from the soil to all other parts of the plants.

Explanation:

I hope I helped:)

What are two tools that can be used to measure wind direction?

Answers

Answer:

it should be a wind vane and an anemometer.

Explanation:

The anemometer measures wind speed and the wind vane helps determine what direction the wind is coming from.

A chemical reaction that has the general formula of nA → (A)n is best classified as a
reaction.

Answers

Answer:

true

Explanation:

Answer:

Polymerization

Explanation:

January comes once in 12 months. Saturday comes once in seven days and 12 noon comes once each day. How is this like the frequency of a wave?

Answers

This is because the frequency of of a wave is a number of repeating event per unit time.

The following RNA strand was produced:

5′ AAA AUG AGU AAG 3′

Which of the following DNA strands could have been the template for this RNA?

Choose 1 answer:

(Choice A)
3′ AAA ATG AGT AAG 5′


(Choice B)
3′ UUU TAC UCA UUC 5′

(Choice C)
3′ TTT TAC TCA TTC 5′

(Choice D)
3′ TTT ATG TGC TTC 5′

Answers

Answer:

Choice 3

Explanation:

Because T corresponds with A and the letter could have been an option but the letter U cannot be in a DNA strand

Plants release a different gas back into the air. What is the name of that gas?What is the name of the gas that plants absorb from the air and use to grow?

Answers

The name of the gas is t

Read the quotation below from a high school science student.
We used a formal method of study to figure out which kind
of grocery bag had the least effect on the environment.
What is the student describing?
O A. Using scientific tools
B. Making random discoveries
C. Using the scientific method
D. Making a conclusion

Answers

Answer:

C. Using the scientific method

Cnidarians do not have a nervous system like ours. a. How does it differ from ours?

Answers

Answer:

Cnidarians have nerve cells that are organized in a nerve net – a diffuse network where neurons interact wherever they cross one another.

Explanation:

Select the correct bisector of the segment.
B
A
B
B
B
А
M
B
B
D

Answers

Answer:

C

Explanation:

it has the example figure number 7 and also it has the correct bisector

Due today, please help

Answers

The nitrogen bases will only bond with one specific nitrogen base such as A - T and G - C. This is known as:

Complimentary Base Pairing

What is the main feature of frog?

Answers

Answer:

In general, frogs have protruding eyes, no tail, and strong, webbed hind feet that are adapted for leaping and swimming. They also possess smooth, moist skins. Many are predominantly aquatic, but some live on land, in burrows, or in trees. A number depart from the typical form.

In general, frogs have protruding eyes, no tail, and strong, webbed hind feet that are adapted for leaping and swimming. They also possess smooth, moist skins. Many are predominantly aquatic, but some live on land, in burrows, or in trees. A number depart from the typical form.
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