Answer:
Distance and displacement are the same in the 100-m sprint, therefore, velocity and speed are the same in the 100-m sprint.
Distance is 400 meters in the 400-m sprint, therefore Speed is not zero in the 400 M sprint.
Displacement is zero in the 400-m sprint, therefore, Velocity is zero in the 400-m sprint
Note: The question is missing some details which is given below;
A 100-meter sprint is a race using only the straight side of a racetrack. a 400-meter sprint is a race that makes one complete lap around a racetrack. why are velocity and speed the same for a 100-m sprint but not a 400-m sprint?
Explanation:
The speed of a body is the ratio of the distance covered and the time taken whereas the velocity of a body is the rate of change of displacement with time.
Distance measures the total length of space covered throughout the duration of motion, whereas displacement measures the change in a specified direction from a specific point.
In the 100 m race along a straight line, both distance and displacement = 100 m, therefore speed and velocity are the same. However, in the 400 m race, distance covered is 400 m, but the displacement is zero since the person returns to his/her starting point. Therefore, speed is not equal to zero, but velocity is equal to zero.
Which correctly lists three factors that contribute to weathering of rock?
O ice, water wind
O layers, minerals, water
Ominerals, water, ice
O water, minerals, wind
How does mitosis differ from meiosis? A. Mitosis makes gametes, meiosis makes body cells B. Meiosis makes haploid cells, mitosis makes diploid cells C. Mitosis requires cytokinesis, meiosis does not D. Mitosis makes gametes and meiosis makes zygotes
Answer:
B
Explanation:
Mitosis carries out the process of asexual reproduction, produces two identical daughter cells and forms diploid cells. Meiosis carries out the process of sexual reproduction, forms four different daughter cells and makes haploid cells.
Which kind of of electrical charge is found on a hydrogen atom of a polar water molecule? A. A negative charge, because of a covalent bond with oxygen B. A negative charge, because of an ionic bond with oxygen C. A positive charge, because of an ionic bond with oxygen D. A positive charge, because of a covalent bond with oxygen
Answer:
D. A positive charge, because of a covalent bond with oxygen
Explanation:
A water molecule contain both hydrogen and oxygen atom. Water is a polar molecule because it has positive electric charge in one of it's poles and negative charge on the other. The hydrogen is positively charged and the oxygen is negatively charged which are bonded by covalent bond. Hydrogen is positively charged because it cannot attract electrons strongly like oxygen which is positively charged. There is unequal sharing of electrons in water molecules and this is why oxygen is slightly negative and hydrogen is slightly positive.
11. Each of the dialysis tubes was labeled "10%". What does that mean?
12. Some tubes increased on mass, some had very little mass change, and others decreased. Using
knowledge of osmosis to explain this phenomenon. Be sure the explanation includes the words
hypertonic, hypotonic, and isotonic.
Answer: 11. 10% is the concentration of solutes, 12. Osmosis is the net movement of solvent through a membrane according to the concentration of the solution.
Explanation:
Osmosis is a phenomenon that explains the movement of a solvent through a semi-permeable membrane without expenditure of energy, where the movement is through simple diffusion.
The tonicity is the total concentration of all solutes in the solution. Then, when a solution has a few particles, it has a low osmolarity, while a solution with many particles has a hight osmolarity. But, when there are two solutions separated by a permeable membrane to water (and not to the solutes or particles) the solvent (water) will move from the lower osmolarity side to the higher osmolarity side (which means, water moves from a region of low concentration to a region of high concentration)
To compare osmolarity of solutions, we use the terms hypertonic, hypotonic and isotonic. This is done, for example, to compar the osmolarity of a cell with the osmolarity of the extracellular fluid around it. If the extracellular fluid has a lower concentration than the fluid inside the cell, it is hypotonic with respect to the cell. In this case, the solvent will go into the cell. If the extracellular fluid has a higher concentration than the fluid inside the cell, it is hypertonic and the solvent will leave the cell from the region of lower solute concentration to the region with more solutes. At last, an isotonic solution is when the extracellular fluid and the cell has the same osmolarity and there will be no net movement of water in or out of the cell.
Increasing on mass would mean that there has been a net movement of water into the bag, because the solution was hypotonic. A decreased on mass mean that there has been a net movement of water out of the bad, because the solution was hypertonic. And if there has been no change or a very little mass change, it means the solution was isotonic, the same osmolarity or concentration of solutes was found inside and outside the cell.
Taking into account the concepts of tonicity and osmolarity, we can explain the process of dialysis which is the process of separating molecules across a semi-permeable membrane in a solution by the difference in their osmotic pressure. It is a laboratory technique where a solution that has many types of different solutes, is put into a semi-permeable sealed dialysis bag, (such as a porous cellulose membrane). Then it is placed in a container with a different solution, or pure water (which has a lower osmolarity). Molecules such as DNA or proteins are larger than the diameter of the pore thereby they are retained within the dialysis bag. However, molecules that are small enough to pass through the pores, such as water, tend to move in or out of the dialysis bag in the direction of the lowest concentration. It is usually used to remove salt from a protein solution. Then, if a dyalisis tube is labeled as 10%, it means its solute concentration is 10% of to the total volume of the dialysis bag.
6. Efferent neurons sends impulses from the central nervous system to the
rest of the body. True or false
Answer: True
Explanation:
The role of afferent neurons is to send the impulses from the central nervous system (and its sensory input received) to the rest of the body.
Why are all the Gas Giants farther from the Sun?
Answer:
In the areas closer to the Sun, it's too warm for the lighter gases to condense there, and so the larger gas and ice giants tended to form further from the Sun.
Explanation:
Answer:
Because the gassess push each other away? Or mabye explosions pushed them out into space?
Explanation:
1.
Water has the ability to store heat longer than other substances and moderate temperature. This
property allows water in cells to absorb much heat without changing. What benefit does this property
of water provide to organisms?
A. O It provides the ability to dissolve nonpolar compounds.
B.
It provides the appropriate catalyst for chemical reactions
C.
It allows organisms to maintain a stable internal temperature or homeostasis
D. It enables organisms to function with a higher cellular pH
Answer:
A.
Explanation:
Which compound that provides energy in cells is made in every tube where cellular respiration is occuring?
Answer:
ATP
Explanation:
Adenosine triphosphate, commonly known as ATP, is the chemical molecule that stores and provides/releases energy in cells. ATP is needed by the cells of every living organism and is obtained via a process called CELLULAR RESPIRATION.
Cellular respiration is the process whereby cells breakdown food molecules (sugar) to synthesize energy storing molecules called ATP. Hence, in every tube where cellular respiration is occuring, ATP is the produced molecule that provides energy.
1
Which of the following must be available for aerobic respiration to take place?
А
Hydrogen sulfide
B
Oxygen
C
Carbon dioxide
D
Nitrogen
Answer
it is B oxygen
Which of the following choices includes two structures that are found in plant cells, but not in animal cells?
A.) cell wall
B.) chloroplasts , ribosomes
C.) lysosomes, mitochondria
D.) cell wall, large central vacuole
Answer:
the answer is d hope this helps
What is a catalyst and how do they help with the chemical reactions needed for metabolism?
Answer:
See explanation
Explanation:
A catalyst refers to any substance that increases the rate of a chemical reaction. A catalyst does not affect the equilibrum position rather it enables the system to attain equilibrum faster.
Biochemical catalysts increase the rate of biochemical reactions in the body. They enable the body to carry out certain important functions that are necessary for life.
what is some sun bears facts
Answer:
Bears are extraordinarily intelligent animals. ...
Bears grieve deeply for others. ...
Bears have excellent senses of smell, sight and hearing. ...
Some species of Asiatic bear build nests in the trees. ...
Bears care deeply about family members.
Explanation: Grizzly bears possess a bite force of over 1200 PSI, which is enough to crush a bowling ball, or an iron skillet.
Our bodies work to fight off infections through nonspecific and specific defense systems. Which of the following is part of the nonspecific response?
Toxic T-Cellss
Memory B-Cells
Skin
Antibody production
Why does a chemical equation need to be balanced to support the law of
conservation of matter?
A. It has to show that atoms of a single element cannot form
different compounds.
B. It has to show that atoms cannot be created from nothing.
C. It has to show how existing matter can be destroyed by a chemical
reaction.
D. It has to show that the total amount of matter increases over time
Answer:
c
Explanation:
Answer:
The answer is B
Explanation:
I got it correct
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What is the genotypic ratio of the cross to the right?
(2 Points)
Оа. 3:1:0
Ob. 12:1
Ос. 4:0:0
Answer:
10101010101010101010101010101010101010101
Explanation:
10101010101010101010101010101010101010101010101010101 hope this helps^w&
Protein molecules are the building blocks of the body. They are made up of long chains of amino acids. Draw the general structure of an amino acid.
Answer:
Please find the diagram of the general structure of amino acids attached.
Explanation:
Proteins are one of the four major biomolecules in living systems. As rightly stated in this question, they are building blocks of the body. However, proteins are biological polymers made up of monomeric units called AMINO ACIDS. A long chain of these amino acids make up a protein molecule.
An amino acid generally consists of a central carbon atom called ALPHA CARBON, attached to an amine group (-NH2), a carboxylic acid group (-COOH), and a side chain (R side chain). All 20 amino acids that exists in nature have this general structure but differs only in the type of SIDE CHAIN (R group) they possess i.e. all amino acids have a different R side chain.
Please find the diagrammatic representation of the general structure of amino acids as an attachment.
Answer:
:)
Explanation:
Maria walks up hill to go to school every day. When she reaches the top of the hill, she is always breathing much faster than when she started. How might this affect how her heart is working? Support your hypothesis with evidence.
Answer:
''By doing hard activity, the pumps very fast.''
Explanation:
''By doing hard activity, the heart pumps very fast.'' is my hypothesis. In this hypothesis, I mentioned that during hard activity pumping of heart goes very fast because our body needs oxygen as well as energy in the form of ATP and the only way to get both oxygen and energy is the pumping of heart which supply oxygen to the cell as a result energy is generated in the form of ATP and removes carbondioxide gas by breathing.
Pick one part of interphase in the diagram above and describe its function in the cell cycle. Explain why interphase is important before mitosis begins.
PLZ I WILL GIVE YOU BRAINLIEST
Answer:Girl we’re taking the same test But here’s what i put
The G1Phase
is an intermediate phase occupying the time between the end of cell division in mitosis and the beginning of DNA replication during S phase. Interphase is important before mitosis begins because DNA is duplicated during interphase before the cell undergoes mitosis, the amount of DNA in the original parent cell and the daughter cells are exactly the same.
(if you need more answers, contact me p.06seoyun on insta)
Normal cells become cancer cells when
1. regulation of cell growth and division is lost.
2.All of the above
3.cells do not respond normally to control mechanisms.
4.cells continue to divide without passing through G1.
Answer:
Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Explanation:
this is what i found
hope it helps
Why did the researchers NOT tell the patients which pill they were given?
Answer:
where is the rest of the question
Explanation:
Which of the following forms of plant reproduction is likely to produce a new plant that is different from the parent plant?
Answer:
Sexual Reproduction
Explanation:
Asexual reproduction is when the parent reproduces by its self and the offspring that comes from it has the same genes as the parent and sexual reproduction is when the off spring has different genes because there are more than 2 parents so if the plant is different and my child looks different from me and i sexually reproduced with someone that means the plant has been sexually reproduced.(can i get brainliest)
Which procedure took the DNA from one sheep to produce a genetically identical lamb, named Dolly?
selective breeding
gene therapy
artificial selection
cloning
Answer:
Cloning
Explanation:
If you take DNA and make a genetically identical thing with that DNA it would be cloning
Answer
D cloning
Explanation:
i just took the quiz and made a 100
Enzymes are involved in important processes in the human body. Name one of these processes.
Answer:
they catalyses or speeds up a chemical reaction.
hope this helps.
why was this semester hard for you?
Answer:
because school is torture
which of the following is a producer
A. Wolf
B.Fern
C.Worm
D.Jaguar
Answer:
B cuase the others are cucomures and pls press the crown on my answers pls so i can be brainlest so i can level up
Explanation:
The temperature of an object is directly related to
A.
the mass of the object.
B.
the motion of its particles.
C.
the potential energy of its chemical bonds.
D.
the volume of the object.
Answer:B. the motion of its particles
What information does the author use to support the point of view in "The Problem with Plastic" that is not included in "Make a Change: Alternatives to Plastic Straws"
Answer:
The environmental threat posed by the egregious amounts of plastic waste that have accumulated over the years, and that will likely continue to increase unabated.
The enormous amount of plastic waste that has collected over time and that will probably continue to grow unabatedly poses a hazard to the ecosystem.
What is point of view?A logical argument supported by substantial evidence is a scientific worldview. We need consider what science actually is in order to comprehend why.
Science is a subject that seeks to comprehend the natural world through methodical observation and experimentation.
Because it is a standardized process, the scientific method is significant. Because the steps in the scientific method are methodical, scientists carry out experiments in a predictable way. Thus, such tests may be conducted more widely.
"The Problem with Plastic" suggests that the massive amount of plastic garbage that has accumulated over time and that will likely continue to grow unabatedly poses a threat to the ecology. It is not mentioned in "Make a Change: Alternatives to Plastic Straws."
Thus, this is the meaning of the given quotation.
For more details regarding point of view, visit:
https://brainly.com/question/11983141
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How does DNA fit inside a cell?
-
Scientists generally study populations by taking a portion of each habitat and then use
the data to make inferences about the habitat as a whole. This method is called: (choose
the best answer)
sampling,
estimating,
testing,
or modeling
GUYS I NEED HELP PLZZ
Which statement does not describe
checkpoints?
O Normal checkpoints assess damage to DNA.
O Defective checkpoints result in the death of the cell.
O Cell checkpoints can fail in mitosis and meiosis.
O Faulty checkpoints may lead to abnormal cell growth.
Answer:
Defective checkpoints result in the death of the cell.
Explanation:
