explain the processs of combustion
Answers
Answer:
Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer. The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually a liquid.
Explanation:
Related Questions
What is the probability of getting the same numbers on 3 dice when they are thrown simultaneously?
Answers
Answer:
So, assuming the dice are 'fair' (that each of the six numbers has a probability of 1/6 of showing up on each of the dice), there is a probability of 1/36 that all three dice will show the same number.
Explanation:
Why does magma, rise to the surface?
a. Magma does not rise to the surface
b. It wants to see what the weather is like at the surface
c. It is cold and dense so it rises
d. Convection in the mantle of the earth
Answers
Answer:
C
Explanation:
Answer:
C. It is cold and dense so it rises
Explanation:
"Molten rock, i.e., magma, is less dense and more buoyant than the surrounding rock, as a result magma rises through Earth's crust. Most magma is trapped in the crust, but some erupts onto the Earth's surface as lava."
Which statement correctly shows the flow of energy in a food chain?
A.
Producer→ heterotroph → decomposer
B.
Autotroph→ decomposer→ heterotroph
C.
Producer ← consumer ← decomposer
D.
Autotroph← decomposer ← consumer
(I need the answer quick please)
Answers
19 POINTS! I will give you a brainly if correct. Energy from Sun reaches the Earth through a type of nergy transfer known as: Also, Make sure to explain your anwser.
A. Radiation
B. Absorption
C. Conduction
D. Convection
Answers
Answer:
Radiation
Explanation:
Electromagnetic radiation from the Sun reaches the Earth in terawatt quantities.
Answer: solar radiation
Explanation: all energy that reaches the earth call solar radiation also called electromagnetic radiation spectrum
Which of the following statements about Cnidarians and Ctenophores are accurate? (Select all that apply) Ctenophores are filter feeders whereas cnidarians are carnivores Cnidarians have an incomplete digestive system whereas ctenophores have a complete digestive system Both cnidarians and ctenophores produce and utilize cnidocytes for prey capture Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions A hydra or sea anemone displays the body form whereas a jellyfish displays the body form. polyp/ medusa Omedusa/ polyp O polyp/ polyp medusa/ medusa What are the cnidocytes? specialized flagellated cells for water movement through the cnidarian body specialized ciliated cells that help the animal swim specialized adhesive cells used in feeding specialized cells with threadlike filaments that function in prey capture and defense specialized excretory cells for waste removal
Answers
The correct statements are:Ctenophores are filter feeders whereas cnidarians are carnivores.Cnidarians and Ctenophores are two phyla of animals in the Kingdom Animalia that exhibit significant diversity in form and lifestyle.
Cnidarians and Ctenophores both produce and use cnidocytes for prey capture. Cnidocytes are specialized cells with thread-like filaments that function in prey capture and defense.Both cnidarians and ctenophores exhibit two distinct body forms: a polyp and a medusa. A hydra or sea anemone displays the body form whereas a jellyfish displays the medusa body form.
Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions.Cnidarians have an incomplete digestive system, whereas ctenophores have a complete digestive system.
The correct statements are:Ctenophores are filter feeders whereas cnidarians are carnivores.Cnidarians have an incomplete digestive system whereas ctenophores have a complete digestive system.Both cnidarians and ctenophores produce and utilize cnidocytes for prey capture.
Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions.A hydra or sea anemone displays the polyp body form whereas a jellyfish displays the medusa body form.The correct answer is option A, C, D, and E.
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What type of bonds are found between the nitrogen bases?
A. Hydrogen bonds
B. covalent bonds
C. peptide bonds
Answers
Answer:
A. Hydrogen bonds
Explanation:
The nitrogen bases are held together by hydrogen bonds.
a neuron that releases a neurotransmitter onto multiple other neurons at the same time is an example of temporal summation. T/F?
Answers
The given statement "a neuron that releases a neurotransmitter onto multiple other neurons at the same time is an example of temporal summation" is False.
A neuron that releases a neurotransmitter onto multiple other neurons at the same time is an example of spatial summation, not temporal summation.
Temporal summation occurs when a neuron receives repeated signals from a single presynaptic neuron over a short period of time, resulting in the integration of those signals to generate a response.
In temporal summation, the presynaptic neuron fires multiple action potentials in rapid succession, leading to a cumulative effect on the postsynaptic neuron.
On the other hand, spatial summation involves the integration of signals from multiple presynaptic neurons that release neurotransmitters simultaneously onto a single postsynaptic neuron, resulting in the summation of their individual effects.
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What is the slope of the line? please help.
Answers
Answer:
The slope is \(\frac{4}{3}\).
Explanation:
Slope is \(\frac{y}{x}\), and to find it we need to look for where the line directly ends on the corner of the graph square. One occurs at (3,4), but the reason the slope is 4/3 and not 3/4 is because it is y over x. The y coordinate lines up at 4 and the x lines up at 3 getting you your answer of \(\frac{4}{3}\). I hope this helps! :) Sorry if this makes no sense- but the answer is 4/3.
Read the following summary, which describes a body process. Then, answer the question.
Blood enters the right side of the heart and travels to the lungs. There, the lungs eliminate carbon dioxide and exchange it for more oxygen. The oxygen-rich blood enters the left side of the heart. Then, arteries carry blood away from the heart.
What process is being described?
Answers
Answer:
This is Circulation -
Pathway of the blood from Heart to Lungs to Heart then the whole body
Explanation:
Answer: circulation
Explanation: I just passed the test with 100 percent
How does the body maintain blood sugar levels? your own words
Answers
Answer:
When the body does not convert enough glucose, blood sugar levels remain high. Insulin helps the cells absorb glucose, reducing blood sugar and providing the cells with glucose for energy. When blood sugar levels are too low, the pancreas releases glucagon.
Explanation:
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the brain's circuitry for smell is closely connected with brain areas involved in
Answers
The brain's circuitry for smell is closely connected with brain areas involved in memory and emotion, particularly the hippocampus and amygdala. When we detect a scent through our olfactory receptors, the olfactory bulb processes the information and sends it to these brain areas.
The hippocampus is responsible for forming and storing memories, which is why certain smells can trigger vivid memories or associations. The amygdala, on the other hand, is involved in processing emotions, leading to emotional responses triggered by specific scents.
This close connection between the olfactory system and these brain areas explains the powerful impact that smells can have on our memories and emotions.
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What chemical elements are present in proteins?
Answers
Cells of the lymphatic system secrete antigens in an attempt to neutralize and remove abnormal substances in the body, such as bacteria and viruses.
a. true
b. false.
Answers
No, it is false. Cells of the lymphatic system does not secrete antigens in an attempt to neutralize and remove abnormal substances in the body, such as bacteria and viruses.
When an abnormal substance such as a bacterium or virus is present in the body, the lymphatic system mounts a defense against the antigen, and some cells produce antibodies in response.
The Lymphatic System or Lymphoid System is an organ system in vertebrates that is part of the immune system and complements the circulatory system.
It consists of lymphatic vessels, lymph nodes, lymphatic or lymphoid organs, and a large network of lymphoid tissues. Blood vessels carry a clear fluid called lymph back to the heart for recirculation.
Unlike the circulatory system, which is a closed system, the lymphatic system is an open system. The human circulatory system processes an average of 20 litres of blood per day by capillary filtration, which removes plasma from the blood.
About 17 litres of filtered blood is reabsorbed directly into the blood vessels, leaving the remaining 3 litres in the interstitial fluid. One of the main functions of the lymphatic system is to provide an additional return path to the blood for the extra 3 litres.
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what is a sound wave
Answers
Answer:
A sound wave is a vibration.
Explanation:
A scientist is conducting embryological studies on a new species of invertebrate. She notices that it has spiral determinate cleavage and a blastopore that develops into a mouth. How does she classify the new species? chordate urochordate deuterostome protostome radiate
Answers
Answer:
Based on the information provided, the scientist can classify the new species as a protostome. Here's the reasoning behind this classification:
Spiral determinate cleavage: Spiral cleavage is a characteristic feature of protostomes. In this type of cleavage, the cell divisions are diagonal and spiral-shaped, leading to the formation of a distinct pattern of cells. Determinate cleavage refers to the fate of the cells being determined early in development. These features are commonly observed in protostomes, but not in deuterostomes.
Blastopore developing into a mouth: In protostomes, during gastrulation, the blastopore forms and develops into the mouth of the organism. This is in contrast to deuterostomes, where the blastopore typically develops into the anus, and the mouth forms later.
Given these characteristics, the scientist can classify the new species as a protostome. The options you provided (chordate, urochordate, deuterostome, and radiate) do not align with the observed traits of spiral determinate cleavage and the blastopore becoming the mouth.
Explanation:
the volume of blood pumped by one ventricle in one minute is defined as:___.
Answers
The volume of blood pumped by one ventricle in one minute is defined as cardiac output.
Cardiac output is a crucial parameter in understanding the efficiency of the cardiovascular system, as it determines the amount of blood being circulated throughout the body to meet its metabolic needs. It is measured in liters per minute (L/min) and can be calculated by multiplying the heart rate (beats per minute) by the stroke volume (volume of blood pumped by each ventricle per beat). In a healthy adult at rest, the average cardiac output is approximately 5 liters per minute. However, this value can significantly increase during physical activity or stress, as the body requires more oxygen and nutrients.
Factors such as age, fitness level, and overall health can influence an individual's cardiac output. Maintaining an optimal cardiac output is essential for the body's proper functioning. Imbalances or inadequacies in cardiac output can lead to various cardiovascular disorders, such as heart failure, hypertension, or circulatory shock. Medical professionals closely monitor this parameter when treating patients with heart conditions or during major surgeries to ensure the effective delivery of oxygen and nutrients to vital organs. So therefore cardiac output is the volume of blood pumped by one ventricle in one minute.
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which of the following statements is true? a.) pyruvate is produced when a glucose molecule undergoes glycolysis. b.) pyruvate is a byproduct of atp production. c.) glycolysis turns pyruvate into glucose. d.) phosphorylation is another word for glycolysis.
Answers
When a glucose molecule engages in glycolysis, pyruvate is formed.
Explain glycolysis:Nearly all sorts of organisms have evolved a metabolic process and anaerobic energy source called glycolysis. The Embden-Meyerhof pathway is another name for the process, given in honour of the key figures in its discovery and comprehension. It serves a purpose in anaerobic respiration because it doesn't need oxygen, but it is also the initial stage in cellular respiration. Molecules of glucose, the most important organic fuel for plants, microorganisms, and animals, are oxidized during the process. A majority of cells favor glucose (although there are exceptions, such as acetic acid bacteria that prefer ethanol). Per glucose molecule, glycolysis uses up 2 ATP molecules and generates 4 ATP, 2 NADH, and 2 pyruvates.
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what is the term for a group of muscle fibers innervated by a single neuron?
Answers
Answer:
The term is Motor unit
Dr. Guindre-Parker observed social birds in Kenya during breeding. Briefly, these birds breed in large groups where the mother and father care for their chicks with the help of additional birds called "helpers". Helpers do not breed themselves, but instead help the parents by bring food to the chicks in the nest. The mother and father birds alone can struggle to find enough food to bring to the chicks in the nest, so it has been suggested that helpers are able to provide additional food to the chicks which can help these chicks survive until they are independent and can feed themselves. Counting the helpers at a nest is rather quick (it takes a few hours), and can be done from afar with binoculars. In contrast, it is difficult to count the number of chicks that survive until they are independent, because they leave the nest and are difficult to find or follow once they hide in the bushes (it can take several days or weeks).
In the "Helpers at the nest" worksheet, Dr. Guindre-Parker includes data on 8 nests, where she counted the number of individual birds that were acting as helpers by bringing food to the chicks within each nest. Dr. Guindre-Parker also followed and counted the number of chicks that survived until they were independent in each nest. At the very end of her research trip in Kenya, Dr. Guindre-Parker found a 9th nest that had 13 helpers but did not have time to follow and count the number of chicks that survived before returning to the USA. What should Dr. Guindre-Parker expect the number of chicks surviving to be, and how confident should she be in that prediction?
Correct hypothesis (.5)
Correct prediction (.5)
Correct statistical analysis ( t-test, linear regression, chi-square, or correlation) and output (1.5)
Correct graph including title, axes labels, and, if applicable, y-error bars (2)
Correct prediction of number of surviving chicks (1)
I mainly just need help figuring out what type of statistical analysis to perform. thank you
Answers
Dr. Guindre-Parker should perform a correlation analysis to determine the relationship between the number of helpers at the nest and the number of chicks that survive until independence.
A correlation analysis will allow Dr. Guindre-Parker to assess the strength and direction of the relationship between the number of helpers and the number of surviving chicks. By examining the data from the 8 nests where she counted both helpers and surviving chicks, she can determine if there is a significant correlation between these variables. The correlation coefficient will provide an indication of the strength and direction of the relationship.
This analysis will help Dr. Guindre-Parker understand if there is a relationship between the presence of helpers and the survival of chicks. If a positive correlation is found, it would support the hypothesis that helpers contribute to the survival of chicks by providing additional food. On the other hand, if no significant correlation is observed, it would suggest that the number of helpers does not impact chick survival.
By conducting a correlation analysis, Dr. Guindre-Parker can gain insights into the relationship between these variables and make an informed prediction about the number of surviving chicks in the 9th nest, which had 13 helpers. However, it's important to note that correlation does not imply causation, and other factors may also influence chick survival.
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you are studying a disease that you suspect may be caused by prions. to help support your hypothesis, you decide to test which part of the cell from an infected animal can infect another animal. if the disease is caused by prions, what cellular component will be infectious?
Answers
There are two different cellular component types of tests for HD: confirmatory testing, which is used to confirm an HD diagnosis in a person exhibiting HD symptoms. The choice to use predictive testing is intricate and subjective.
To find new leads for unsolved violent murders, law enforcement uses forensic genealogy, which combines DNA analysis with conventional genealogical research.
The direct genetic test, which counts the amount of CAG repeats in the HD gene using DNA extracted from a blood sample, is the most reliable and accurate approach of diagnosing HD. Having 36 or more repeats confirms the presence of HD. HD is ruled out by a test result of 26 or less repetitions.
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HELP PLEASEEE, IM HAVING A REALLY BAD DAY AND I CANT FOCUS ON THIS
Answers
Bag A will gain weight since it has more glucose.
What effect would cAMP phosphodiesterase activity have on the adrenaline signalingpathway?
Answers
cAMP phosphodiesterase activity would decrease the levels of cAMP in the cell, which would subsequently decrease the activation of protein kinase A (PKA) and downstream signaling pathways.
This would result in a decreased response to adrenaline, as adrenaline signaling is mediated in part by the cAMP/PKA pathway. Therefore, the overall effect of cAMP phosphodiesterase activity on the adrenaline signaling pathway would be to attenuate or dampen the response to adrenaline.
The effect of cAMP phosphodiesterase activity on the adrenaline signaling pathway is that it degrades cAMP, a secondary messenger, into AMP. This decrease in cAMP levels ultimately leads to the termination of the adrenaline signaling pathway, reducing the cellular response to adrenaline.
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Which of the following statements about the Green Revolution is true?
A. The Green Revolution increased the biodiversity of crops grown around the world.
B. The Green Revolution bettered the environment by encouraging less fertilizer and
pesticide use.
C. The Green Revolution allowed countries that previously imported crops to become
crop exporters.
D. The Green Revolution was applied in the Americas but didn't have a global
impact.
Answers
The Green Revolution allowed countries that previously imported crops to become
crop exporters.
What is the Green Revolution?The Green revolution refers to the period of cultivation of high-yielding crops varieties especially grains by farmers beginning in the period of the 1940s to l960s.
The Green revolution resulted in increased food production among countries that usually imported food, so they became exporters.
Therefore, the Green Revolution allowed countries that previously imported crops to become
crop exporters.
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i need help i can't tell if water gets cold faster when it's hot or when it's cold?
Answers
Answer:
It differs, in some cases, hot water may get cold faster than water at room temperature, yet it is not 100% of the time.
I need help with this Biology
Answers
Answer:
A.
Explanation:
All the microbes I were living inside the person's body die when the person dies
one primitive trait of ardipithecus ramidus is its group of answer choices opposable big toe pelvis. hip. flat face.
Answers
The Opposable toe is one of Ardipithecus ramidus' primordial characteristics.
A species of hominid known as Ardipithecus ramidus lived in the early Pliocene about 4.5 million years ago. The grasping or opposable big toe of Ardipithecus ramidus, which is specialized for mobility in trees, is a primordial characteristic of this species. The characteristics referred described as "primitive qualities" come from remote ancestors.
Humans and other primates have opposable thumbs. Additionally, several primates have opposable large toes that can be used similarly to an opposable thumb. Humans are the only primates without an opposable big toe. For movement in trees, where they can utilize it to hold trees while climbing, opposable big toes were developed. All previously known hominins lacked an opposable big toe, but Ardipithecus ramidus did.
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Gressel the Goblin is making an inventory of Darklord Ganondorf’s treasure horde following a raid by some violent fellow named link. The horde now contains only 2150 gems (as in $). Gressel notices that there were twice as many green-gems (worth 1) as blue-gems (worth 5) and 13 fewer blue gems than red-gems (worth 20). How many red, blue and green gems are there remaining in the horde?
Answers
➥ Let the number of blue gems be x, green gems be 2x and red gems be x + 13.
According to question,
5x + 1 × 2x + 20(x + 13) = 2150
On solving equation, we get
27x + 260 = 2150
27x = 2150 - 260
27x = 1890
x = 1890/27 = 70 blue gems.
2 × 70 = 140 green gems.
70 + 13 = 83 red gems.
Hence, We have 70 blue gems, 140 green gems and 83 red gems.
How many years did it take to double between .5 billion and 1 billion?
Answers
Answer:
2
Explanation:
you take 1 billion and divide it by 0.5 and to check your work you would take your answer and multiply it by 0.5
In the first experiment, Dr. Palumbi applied heat stress to corals from different pools, warm and cool. Make a
claim regarding the resistance to bleaching of the warm pool corals and the cool pool corals. Justify your
claim with experimental evidence.
Answers
Answer and Explanation:
Corals from the warmer pool (20%) were more resistant to bleaching with a 35% difference to the cooler pool (55%). the resistance to bleaching of the warm pool corals.
Which feature, viewable in this image, distinguishes cartilage from connective tissue proper? O amorphous matrix O gelatinous ground substance O cells located within lacunae O collagen fibers
Answers
The correct option is C ; Cells located within lacunae, In contrast to other connective tissue, cartilage lacks a direct blood supply and is hence nonvascular.
Cartilage absorbs nourishment and removes metabolic waste via extracellular matrix diffusion.
Connective tissue is made up of cells as well as an extracellular matrix (ECM).
• ECM is made up of structural and specialized proteins that make up the ground material.
• Bounded by the basal laminae of the various epithelia and the basal or exterior laminae of muscle cells and nerve-supporting cells, connective tissue forms a huge and continuous compartment throughout the body.
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