Which statement best describes the use of a catalyst in a fuel cell? It reduces waste. It lowers energy requirements. It reduces toxic exhaust. It increases reaction rates.
The statement that best describes the use of a catalyst in a fuel cell is : ( D ) It increases reaction rate
A catalyst in a fuel cell speeds up/facilitates the rate of reaction of oxygen and hydrogen especially at the oxygen electrode of the fuel cell.
Generally catalyst is any substance that increases the rate of a chemical reaction without been used up in the process, while lowering the activation energy required to kickoff the reaction.
Hence we can conclude that the statement that best describes the use of a catalyst is that it increases the reaction rate
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Answer:
The answer is D
Explanation:
EDGE2022
Rewrite the following equation in slope-intercept for. 6x - 4y = -5
Answer:
y = 3/2x + 5/4
Explanation:
Y = mx + b. DONE.
Which of the following best predicts the effect of not having ATP available to supply energy to this
process?
A. H+ ions will stop moving through the protein.
B. H+ ions will move in the other direction through the protein.
C. H+ ions will continue to move through the protein in the original direction but at a slower rate.
D. H+ ions will begin to move through the phospholipid portion of the membrane in the original direction.
H+ ions will stop moving through the protein is the effect of not having ATP
available to supply energy to this process.
ATP is the form of energy used by cells and it ensures that cells perform their
daily activities optimally. ATP is needed in a lot of metabolic reactions and
transportation of materials within cells.
When there is a lack of ATP, it means there is no energy required to
transport or move substances within a cell. This means that the H+ ions will
stop moving through the protein and is the most appropriate choice.
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HELP WITH SCIENCE PLS!!
what change to a property of a light wave would make the light wave appear dimmer?
a. reducing the waves frequency
b. reducing the waves amplitude
c. increasing the waves amplitude
d. increasing the waves frequency
Answer:
B.
Explanation:
The brightness of light is related to intensity or the amount of light an object emits or reflects. Brightness depends on light wave amplitude, the height of light waves. Brightness is also somewhat influenced by wavelength.
The brightness of light is related to intensity or the amount of light an object emits or reflects.
What is brightness?Brightness depends on light wave amplitude, the height of light waves. Brightness is also somewhat influenced by wavelength.
When a source appears to be reflecting or radiating light, it is said to be bright. It's critical to comprehend the terminology and technology utilized in the lighting sector.
Lumens are a unit of measurement for light output from a bulb. A light's lumen count indicates its brightness; a lower lumen count indicates a dimmer light. Weight is like bananas, To milk are gallons, Lumens enable you to purchase the desired amount of light.
Therefore, The brightness of light is related to intensity or the amount of light an object emits or reflects.
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1. Which is a source of genetic variation?
a. Mutations
b. artificial selection
C. exponential growth
d. genetic bottlenecking
Answer:
Mutation is a source of genetic variation
Answer:
Mutations
Explanation:
Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
if prokaryotes are defined as single-celled organelles, which of the following would ONLY make it a prokaryotic cell
Answer
hmmm i would say a or c but i would say c
Explanation:
Zander is conducting an investigation, and he used this video. Which statement best describes what Zander is testing in his experiment?
When a substance changes from a gas into a liquid due to a change in temperature, melting occurs, which is a physical change.
When a substance changes from a solid into a liquid due to an increase in temperature, it is a physical change.
When a substance changes from a gas into a liquid due to a decrease in temperature, the substance cools down and condenses, which is a phase change.
When a substance changes from a liquid into a gas due to a decrease in temperature, the substance evaporates and cools down, which is a phase change.
Answer:
sorry it is c
Explanation:
how long does it take for a humming bird to flap its wings once?
Answer:
not really sure but i know it takes 10-15 times per second. also you might have to do some math i hope this helped a bit and sorry i couldn't give you an exact answer
Oil is also known as
Answer:
Oil is known as Petroleum.
What factors could decrease the rate of photosynthesis in a plant?
Answer: light intensity, carbon dioxide concentration and temperature i think- maybe
Explanation:
Without enough light, a plant cannot photosynthesise very quickly, even if there is plenty of water and carbon dioxide, Increasing the light intensity will boost the rate of photosynthesis and for carbon dioxide even if there is plenty of light, the plant cant photosynthesise if there is insufficient carbon dioxide. and why temperature is because if it gets too cold the rate of photosynthesis will decrease, Plants cant photosynthesise if it gets too hot either
NEED HELP ASAP PLEASE Describe the controversy surrounding dissociative identity disorder as a diagnosis and explain how stress
may play a role in a misdiagnosis.
The controversy surrounding dissociative identity disorder as a diagnosis is that accounts of dissociation based on current diagnostic scales are invalid because the design of the scales increases the possibility of false positives.
Stress may play a role in misdiagnosis because individuals who have experienced stress may be more likely diagnosed as having dissociative identity disorder.
What is misdiagnosis?Misdiagnosis is described as an incorrect conclusion about the cause of a disease or problem.
Stress is a reaction marked by emotional exhaustion, depersonalization manifesting in cynicism and detachment from work, and a lack of sense of personal accomplishment.
In conclusion, Misdiagnosis can have serious consequences on a person's health.
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Which figure is the percent of energy at which one trophic level generally flows to the next level?
1)10%
2)35%
3)50%
4)100%
Answer:
Which figure is the percent of energy at which one trophic level generally flows to the next level 10
PLS HELP
Which of these would not be found in the pancreatic juice?
A.trypsinogen
D. secretin
B. nucleases
E. lipase
C. amylase
Anwer:
D. Secretin
Explanation:
Pancreatic juice contains Amylase, Lipase, Trypsinogen, and Nucleases (RNAase and DNAase).
Secretin is secreted by the mucosa of duodenum and jejunum.
addition of large amounts of salt to soil in which plants are growing kills the plants. explain
Which of the following are the two principal end products of photosynthesis? (4 points)
a) Glycogen and starch
b) Glycogen and cellulose
c) Starch and glycerol
d) Starch and glucose
Please help me with the answer, tysm!
Answer:
Starch and Glucose
Explanation:
Hope this helps
Answer:
The end products of photosynthesis are glucose and oxygen. None of those answers are right..
Explanation:
Which correctly matches the strand of DNA with his complementary strand of RNA
Answer:
I think it's C. hope that helps
Phospholipids in a cell membrane are arranged so that the ______________ heads face the inside and outside of the cell where water is found.
A, hydrophilic.
B, hydrophobic.
C, water-fearing.
D, none of the above.
Please help :)
__________________________bacteria survive in the harsh environment of the stomach because it is able to neutralize the gastric acids and live in the mucosal stomach lining, safe from the host's immune responses.
Answer:
Archaebacteria
Explanation:
It is the only bacteria able to survive harsh environments.
(P.S. why did you delete my 1st response?)
hypothesis for protein synthesis gizmo
Answer:
this link is the answer https://www.scribd.com/document/487194021/protein-synthesis-gizmo
One possible hypothesis for the Protein Synthesis Gizmo could be: "If the availability of amino acids is increased, then the rate of protein synthesis will also increase."
This hypothesis suggests that the amount of protein synthesized by the cell is directly influenced by the availability of amino acids, which are the building blocks of proteins. Amino acids are monomers of protein.
By increasing the supply of amino acids, it is expected that the cell will have more resources to engage in protein synthesis. It causes an increase in the rate at which proteins are produced.
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Define nutrient and thermal pollution.
Answer:
Nutrient pollution is the process where too many nutrients, mainly nitrogen and phosphorus, are added to bodies of water and can act like fertilizer, causing excessive growth of algae
Explanation:
rita has two small containers one holding liquid and one holding a gas rita transfers the substances to two larger containers compare the behaviors in the atoms in the liquid and in the gas once they are moved to larger containers
Answer:The behavior of the both liquid and gas will be different in some aspect and same in the other, lets see how:
Explanation:
As we have studies that liquids donot have a specific shape but do have a specific volume. So when the liquid will be transferred from small to large container, it will adapt the shape of new container but its volume will stay same as it was in old container.
On the other hand, about gases, we know that they donot have specific shapes and the volume is also not definite and depends on the shape of container. Therefore, the gas atoms will freely move in the container and the volume will be changes in large container.
If spindle microtubules fail to bind some kinetochores in meiosis, then most likely: _____________
a. excessive cell divisions will occur resulting an increase in the chromosome number known as polyploidy.
b. the resulting cells will not receive the correct number of chromosomes in the gametes, a condition known as aneuploidy.
c. new microtubules with more effective binding capabilities to kinetochores will be synthesized to compensate for the defect.
d. the defect will be bypassed in order to ensure normal chromosome distribution in the new cells.
state one way of monitoring the activity of the heart
A cardiac event monitor
which best describes the homes in which peasants lived?
Answer:With more money, peasants were able to afford better housing and many now lived in wattle and daub houses. Wattle and Daub houses were taller and wider than the simple stick and straw houses. They also offered better protection from the weather.
Explanation:
Are there any parts of the human body that get oxygen directly from the air and not from the blood?
Answer:
The Cornea
is the answer
What are two things that compose matter?
Answer:
All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons. Atoms come together to form molecules, which are the building blocks for all types of matter. so it is like they all come together to make a group then they work together
Explanation:
What is photosynthesis???
By definition, photosynthesis is a metabolic process carried out by certain cells of autotrophic organisms, that is, those that have the capacity to make their own food, such as plants.
With this process, plants capture the energy of sunlight and transform it into chemical energy, to produce organic matter.
Photosynthesis takes place in 2 stages:
In the first stage the plants absorb water from the soil through the roots. Through their stems they transport it to their leaves. In these it meets the sunlight captured by chlorophyll, which breaks the water molecule, separating hydrogen (H) from oxygen (O₂). The other stage is capturing carbon dioxide. This provides the carbon and oxygen atoms that, together with hydrogen and stored energy, will form the glucose molecule, from which compounds are produced that are the basis of food for plants and other living beings.Then, sunlight, carbon dioxide and water are needed for the photosyntesis, while oxygen is released to the environment.
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brainly.com/question/13523854?referrer=searchResults brainly.com/question/13523849?referrer=searchResults brainly.com/question/873199?referrer=searchResultswhich type of connective tissue has a mineralized different matrix?
Answer:
Bone
Explanation:
what is happening in the convection layer of the Sun
Answer:
In the convective zone, the temperatures are cool enough—under 1,800,000 degrees Fahrenheit (1,000,000 degrees Kelvin)—that the atoms in the plasma there can absorb the photons coming outward from the Sun's radiative zone. The plasma gets very hot, and begins to rise upward out of the Sun.
State reactants and products by either photosynthesis OR cellular
respiration (you do not have to do both!) Be sure to specify the reactants
and the products. For example: The reactants of
and the products are
are