Answer:
Explanation:
To solve for r, simply means to isolate the variable:
[tex]V = pi*r^2*h\\[/tex]
The inverse of multiplication is division, so divide both sides by pi and h
[tex]\frac{V}{pi*h} = r^2[/tex]
[tex]r = \sqrt\frac{V}{pi*h}[/tex]
which region of the brain is larger in humans and primates than in other vertebrates?
where does the energy start and where does it end
Answer:
Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix. These sources originate mostly in our local star, the Sun.
That light energy will be absorbed and converted to heat. Then it will radiate out into space as infrared thermal radiation. It will travel in that form for a long time, once it gets out of the Earth's atmosphere.
Explanation:
Hope it helps
Answer:
You did not really specify your question but I am guessing it is talking about the food chain and the food chain starts at the plants and ends at the predator who does not have a predator.
Explanation:
Somebody help me please
QUESTION: While some bacteria are pathogenic (disease-causing), others have beneficial effects on humans. Describe one way in which bacteria are helpful in our day-to-day lives, indicating how their presence is important.
ANSWER:
HELP ME PLEASEE
tell me what to write in the answer box
Answer:
See below (you have multiple answers to choose from)
Explanation:
-Bacteria helps degrade the food we eat
-They help trees grow
-They are also used in biotechnology applications to produce everything from food to energy to clean water.
- They are important in the recycling of nutrients in the environment
Answer:
One way in which bacteria are helpful in our day-to-day lives is the bacteria present in our stomachs which help us digest certain types of food and some chemical compounds inside of some food items. Without these bacteria, some compounds in food would not be able to be broken down and would in turn either poison or harm us in some way.
Explanation:
Review this scenario. Rainbow trout are a freshwater fish native to streams and lakes along the western coast of North America. While studying streams in the eastern United States, an ecologist noticed that rainbow trout were abundant in the ecosystem, but other native species of fish were almost entirely missing. She also observed lower populations of macroinvertebrates. The ecologist wondered why there were so few native fish species and macroinvertebrates. By reading ecological reports of the area, the scientist learned that rainbow trout had been introduced to the streams for sport fishers to catch. Initially, 100 fish had been introduced, but the ecologist conducted a field survey and estimated that over 1,000 rainbow trout now lived in the streams. She also read from other studies that rainbow trout feed primarily on macroinvertebrates. Which question most closely relates to the ecologist's observations and the collected scientific data on river ecosystems? Do the native fish species have a disease? Are rainbow trout displacing native species by outcompeting them for food? Did pollution kill off the native fish species? Why are there so many rainbow trout in the streams?
The question that best relates to the ecologist's observations and the scientific data collected on river ecosystems is:
Is rainbow trout crowding out native species by competing with them for food?
The previous question that the ecologist very possibly must ask is due to the overabundance of rainbow trout and the very low number of native species.
In order for rainbow trout to adapt and reproduce quickly, it has had to feed on macroinvertebrate species, affecting the native fauna of this ecosystem and causing the displacement of other native species and even death due to lack of food.
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Design a controlled experiment to determine the effect of hot, dry air on head lice. In your experimental design, be sure to:
• state the hypothesis to be tested in the experiment [1]
• state one way the control group will be treated differently from the experimental group [1]
• state one result of the experiment that would support the hypothesis [1]
An experiment is carried out to answer a question. The hypothesis predicts what is expected to occur. Experimental and control groups are compared to analyze the results, supporting or not the hypothesis.
-----------------------------------------
BACKGROUND
When people are infested with head lice, it is recommended to wash their cloth and dry it with hot air over 53 or 54ºC for 5-30 minutes.
Head lice and eggs seem to die when exposed to those conditions by getting dehydrated.
SITUATION
We will assume that we work in a primary school and that students from the 3rth grade are being affected by this parasite.
We want to know if applying hot air to these students before entering the class will make a difference and help to control this problem.
So, we will propose an experiment to answer this question.
HYPOTHESIS
A hypothesis is a conjecture. A researcher hypothesizes to predict what is going on or what is expected to occur. The hypothesis is a claim of how it works a relation between two or more variables. Usually, it is written in the present time.
Hypothesis ⇒ Applying hot air to students' heads kills the head lice that students are carrying.
To evaluate the effect of hot air, we need to keep control of as many other variables as possible.
To do so, we asked students' families not to use other treatments on students' heads and to bathe them daily.
In this way, we were sure that all students
were equally affected by the parasite, took showers every day, and neither was using any other product that could affect the results.Our population was the 3rth grade students ⇒ 64 children ⇒ 30 girls + 34 boys.
Before the experiment, we separated the 3rth grade into two groups.
Group A ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Experimental groupGroup B ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Control group
→ Treatment
Each student from group A received hot air every day for one week before entering the class.
Hot air was 53ºC and was applied for 5 minutes.
→ Control
Each student from group B did not receive the treatment for one week before entering the class.
CONTROL GROUP
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.
Individuals of the control group are selected from the same population as the treatment group.
*** These two groups are identical in all aspects except for the independent variable, which changes in the treatment group but remains constant in the control group. ***
The control group is Group B. The only difference between the control and the experimental group is that the first one did not receive the treatment. Every other aspect was equal for both groups.
The only way the control group was treated differently from the experimental group was that the control group did not received the treatment, while the experimental group did.
RESULTS
After one week, groups were compared to see if the hot air was effective in killing head lice.
When comparing the control and the experimental group, we could see that students from group A were free of parasites.
Students from group B were still affected by the head lice.
CONCLUSION
The results support the hypothesis. Hot air turned to be a great treatment for lice control.
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Compound X is used as an energy source in respiration.
Suggest the name of compound X.
Answer:
Glucose
Explanation:
After reading the overview of cellular respiration, the primary or initial fuel of respiration should be clear - it's glucose, which is the molecule of sugar that plants create for animals (as well as the plant itself) to utilize as an energy source.
Hope this helps!! Brainliest?? Anyways have a great day!!
Which of the following takes place in water vascular system select all that apply
(A)maintaining a certain pressure
(B)prying open prey
(C)exchange of gases
(D)grasping onto rocks
(E)carrying out waste
Answer:
a b e
Explanation:
hope this helps
Cuales filosofos dedicaron su vida a la cienca naturales y cuales fueron sus aportes
Answer:
erm wha-
english please?
Explanation:
Describe the nucleus of an atom.
Answer:
The atom consists of a tiny nucleus surrounded by moving electrons. The nucleus contains protons, which have a positive charge equal in magnitude to the electron's negative charge. The nucleus may also contain neutrons, which have virtually the same mass but no charge.
Explanation:
drag each micrograph to the target that indicates the stage of mitosis or cytokinesis it shows.
Mitosis occurs after the interphase and involves four stages. After mitosis event occurs cytokinesis. The correct order is 1A, 2F, 3E, 4B, 5C, 6D.
------------------------------------------
Mitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced.
First occurs duplication of the cell content, and then the separation into two new cells happens.
Mitosis occurs in only one phase.
• In the prophase, it occurs chromosomes condensation and nuclear membrane breaks.
• During the metaphase, chromosomes are taken toward the center of the cell by the spindle apparatus. Once in the equatorial plane, chromosomes line up.
Each chromatid joins with a microtubule of opposites poles.
• In Anaphase, bonds between chromatids break. They separate and migrate to the opposite poles.
• In telophase, duplicated chromosomes are already in the corresponding poles, and the nuclear membrane forms again in each pole.
• Finally, cytokinesis occurs. Through invagination of the cell membrane, the cells and their cytoplasmatic content get separated.
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explain what happen during the process of birth
referred to the following terms in your exlanation
gestation period
role of oxytocin
after birth
caesarean
colostrum
Answer: ok so the prosses of birth is kinda a science question and will be a hard answer. so it starts how it does and the sperm meets the egg and the baby starts to grow from there
Explanation:
1. Write true or false for the following statements. Also rewrite the false statements correctly
A) Stomata in the leaves open and close with the help of guard cells
Answer:
TrueExplanation:
Make me as brain liest
which body system is made up of the heart, veins, and arteries?
Answer:
The circulatory system
Explanation:
The heart, veins and arteries works together to service the cells of the body
An undersea volcano erupts, creating a new island in the Gulf of Mexico. Life slowly starts to appear on the island. What would probably be the first species to take hold and survive? Pls, explain your answer.
A. ferns C. lichens
b. finches d. grasses
Answer:
Lichens
Explanation:
Lichens are very mere grasses
They need very less oxygen
They can adopt in any situation just they need drops of water .
So they will start to hold and survive at first
10. If an A (adenine) is exchanged for a C (cytosine) in a gene, it is a:
Answer:
Explanation:
A mutation occurs, and cytosine is replaced with adenine. ... (Figure) Adenine is larger than cytosine and will not be able to base pair properly with the guanine on the opposing strand. This will cause the DNA to bulge.
Why is water described as a polar molecule ?
Answer:
It is described as a polar molecule because of an unequal sharing or electrons, causing the molecule to have a more bent shape.
Explanation:
Electrons are attracted a bit more to the oxygen and spend more time with them than the hydrogen.
which activity results from the action of hydrochloric acid on protein in the stomach?
Answer:
Hydrochloric acid contributes to protein digestion by supplying H+ which activates pepsinogen, the precursor to pepsin. Pepsinogen is secreted by chief cells in the gastric glands of the body and antrum of the stomach
I hope this will be helpful
Activation of pepsin results from the action of HCl. Pepsin is important for the digestion of proteins. Thus, partial digestion of proteins happens in stomach.
What are the functions of stomach?Stomach has an important role in the digestion of food. It is regarded as organ for temporary food storage.
Stomach contains various digestive enzymes, gastric juice and hydrochloric acid that prepares the food for complete digestion in the duodenum.
The walls of the stomach secrete hydrochloric acid which is responsible for imparting acidity to food. It is also important for killing of any bacteria present in the food. The acidic pH activates the enzyme pepsin which is required for the digestion of proteins into peptones.
Stomach also contains the gastric juice which kills any microbes present in the food. It is also important for nutrient absorption. Stomach also contains enzyme lipase to favour partial digestion of lipids.
Thus, stomach is important for the partial digestion of proteins and lipids.
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Which of the following is hypothesis
A.if plant receives more water then it will grow taller.
B. What happens if a plant receives a lot of water
C. Plants need water to grow
Answer:
A
Explanation:
Hypothesis Is an educated guess. So, your educated guess is that if you water the plant, the plant will grow taller.
Name a process in plants that uses oxygen. Compare the raw materials and products of this process with those of photosynthesis
Answer:
Cellular respiration uses oxygen. Comparisons below in explanation.
Explanation:
Plants do both photosynthesis and cellular respiration. They make their own food (photosynthesis) and break it down to make energy (cellular respiration). Cellular respiration uses oxygen, while photosynthesis doesn't (it is a product).
Photosynthesis has this as its general chemical equation:
[tex]6CO_2 +6H_2O[/tex] ⇒ [tex]C_6H_{12} O_6 + 6O_2[/tex]
Cellular respiration has this as its general chemical equation:
[tex]C_6H_{12} O_6 + 6O_2[/tex] ⇒ [tex]6CO_2 + 6H_2O[/tex]
As you can see, the raw materials of cellular respiration (glucose and oxygen) are the products of photosynthesis. The products of cellular respiration (carbon dioxide and water) are the raw materials used in photosynthesis.
Is this poison sumac?
Answer:
Definitely not
Explanation:
Usually they have clusters of small green or white berries on them, as well as smaller, glossier looking leaves.
which trait would be most closely associated with high levels of mobility?
Answer:
7. Which trait would be most closely associated with high levels of mobility?
a. A body cavity
b. Germ layers
c. Cephalization <-----this one
d. A cuticle
e. Incomplete metamorphosis
Explanation:
usain bolt, a world champion sprinter, can run a 10-meter split in 0.82 seconds. say you obtain a quadriceps muscle sample from usain bolt and compare it to one from a 25-year-old male long-distance runner. what differences do you expect to observe between those two muscle samples? select all that apply.
A quadriceps muscle sample from Usain Bolt and compared it to one from a 25-year-old male long-distance runner, and it is seen that there are more fast-twitch fibers and red and white muscle fibers of larger cross-sectional area in Usain Bolt's leg muscles.
What is the distinction between fast-twitch and slow-twitch muscles?Athletes who run fast, such as sprinters, have more fast-twitch muscle, which is called "white muscle," as they need more energy for a short period of time, and as a result, the muscles anaerobically respire. The slow twitch muscle, called "red muscle," is more commonly seen in the long distance runner, such as in the marathon, and these runners need a continuous supply of energy for a long time, so aerobically the muscle respires.
Hence, a quadriceps muscle sample from Usain Bolt was compared to one from a 25-year-old male long-distance runner, and it was seen that there are more fast-twitch muscle fibers and red and white muscle fibers with a larger cross-sectional area in Usain Bolt's leg muscles.
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The question is incomplete; the complete question is below.
usain bolt, a world champion sprinter, can run a 10-meter split in 0.82 seconds. say you obtain a quadriceps muscle sample from usain bolt and compare it to one from a 25-year-old male long-distance runner. what differences do you expect to observe between those two muscle samples? select all that apply.
more fast-twitch fibers in Usain Bolt's leg muscles
more mitochondria in Usain Bolt's leg muscles
red and white muscle fibers of larger cross-sectional area in Usain Bolt's leg muscles
What foods contain saturated fats in general?
Answer:
cheese,bacon,sausages,biscuits,cakes.
Answer: Triple bacon cheeseburger
Explanation:
help me with these questions
Answer:
1. land
2. crops
3. lack
4. Plants, people
Hope it helps.
during which of the following processes do sister chromatids separate from each other?
Answer:
Sister chromatids separate from each other during anaphase of mitosis and the anaphase II of meiosis II. During the anaphase stage of mitosis these chromatids separate and one chromatid goes into each daughter cell. During cell division they are separated from each other and each daughter cell receives one copy of the chromosome.
Explanation:
diffusion is the net movement of __ through a semipermeable membrane based on a concentration gradient.
Answer:
Molecules
Diffusion is the net movement of molecules through a semipermeable membrane. It goes from high concentration to low concentration.
Diffusion is the net movement of molecules through a semipermeable membrane based on a concentration gradient.
What is diffusion?
Diffusion has the net movement of molecules through a semipermeable membrane. It goes from high concentration to low concentration. Osmosis has been the process in which molecules of the solvent pass via a semipermeable membrane from a lower concentrations to higher concentration or from less concentrated solution to high concentrated solution. In the process of osmosis movement of water takes place.
There are mainly three types of osmosis and these are hypertonic, hypotonic, and isotonic. The process of osmosis is passive transport as water moves from low solute concentration to high solute concentration.
Osmosis has been also known as diffusion of water or solvent via a membrane which allows only selective substance to go across the channel. The process of osmosis does not require ATP because it is a passive process.
Therefore, Diffusion is the net movement of molecules through a semipermeable membrane based on a concentration gradient.
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which cell is most likely to produce the highest number of proteins for export from the cell?
Answer:
Hola no puedo ayudarte bueno listo XD
in both lichens and mycorrhizae, what does the fungal partner provide to its photosynthetic partner?
Answer:
it provides carbon as food resource
what is the species that is most distinct through the largest number of genetic differences or the most different morphologically, compared to other species of interest, called?
An outgroup is a distantly related group of animals used to determine the evolutionary relationships of the ingroup.
What are outgroup species?An outgroup, which differs from sociological outgroups, is a group of organisms that are more distantly connected and that is used as a reference group when assessing the evolutionary relationships of the ingroup, the group of organisms that are the subject of the study.
Looking at a closely related species that is known to be phylogenetically distinct from the group of species we are researching is known as the "outgroup comparison" strategy. It is likely that the character state in that outgroup was ancestral to the group under study.
Examples are Gibbons, Marsupials, Echinoderms, and Gymnosperms.
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