For the girl pulling a sled with a mass of 6.0 kg t the left with a force of 10.0 N at a 30.0° angle, we have:
a) The normal force acting on the sled is 294 N.
b) The acceleration of the sled is 1.2 m/s².
a) We can calculate the normal force acting on the sled, with the sum of all the forces acting in the vertical direction:
(1)
Where:
W: is the weight force or force of gravity = 58.8 N
: is the component of the applied force in the y-direction
N: is the normal force =?
The vertical component of the force () can be calculated as follows:
(2)
Where:
F: is the applied force = 10.0 N
θ: is the angle (with the horizontal) = 30.0°
By entering equation (2) into (1) we have:
Hence, the normal force acting on the sled is 294 N.
b) The acceleration of the sled can be found with the forces acting on the x-direction:
Where:
a: is the acceleration =?
m: is the mass = 6.0 kg
: is the component of the applied force in the x-direction = Fcos(θ)
: is the force of friction = 1.5 N (it is negative because is in the opposite direction of motion)
Therefore, the acceleration is:
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name 2 ways that the products of mitosis and meiosis are different in humans
Answer:
Mitosis involves the division of body cells, while meiosis involves the division of sex cells. The division of a cell occurs once in mitosis but twice in meiosis.
During physiology class, the instructor asks students to explain the pathology behind development of multiple sclerosis. Which student gave the most accurate description
The most accurate description is option (A) i.e, The demyelination and subsequent degeneration of nerve fibers and decreased oligodendrocytes, which interfere with nerve conduction.
What is multiple sclerosis?A condition where the immune system destroys the nerves' protective covering.
Multiple sclerosis doesn't have a known etiology. A body's immune system attacking its own tissues is regarded as an autoimmune disease. The fatty substance known as myelin, which covers and shields the nerve fibers in the brain and spinal cord, is destroyed in Multiple sclerosis, which has four stages:
solitary clinical syndrome (CIS)Remitting-relapsing MS (RRMS)MS with secondary progression (SPMS)MS with primary progression (PPMS)Common signs of multiple sclerosis (MS) include:
vision problems.tingling and numbness.pains and spasms.weakness or fatigue.balance problems or dizziness.bladder issues.sexual dysfunction.cognitive problems.To know more about multiple sclerosis refer to: https://brainly.com/question/11122101
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The complete question is:
During physiology class, the instructor asks students to explain the pathology behind development of multiple sclerosis. Which student gave the most accurate description?
A)The demyelination and subsequent degeneration of nerve fibers and decreased oligodendrocytes, which interfere with nerve conduction
B)Muscle necrosis with resultant increase in fat/connective tissue replacing the muscle fibers
C)Atherosclerotic destruction of circulation to the brain resulting in lactic acid buildup that affects nerve transmission
D)Autoimmune disease where antibody loss of acetylcholine receptors at the neuromuscular junction causes decrease motor response
At the molecular level, cells from different types of organisms vary in their tolerance to temperature and pH. This variation can mostly likely be attributed to
At the molecular level, cells from different types of organisms vary in their tolerance to temperature and pH. This variation can mostly likely be attributed to the types of enzymes present in the cells.
The tolerance ranges for abiotic environmental factors are similar to the geographic ranges that organisms have. To put it another way, they can tolerate (or survive in) a specific range of a given factor, but they cannot survive if the element is present in either an excessive or insufficient amount. Take temperature, for example. Polar bears thrive in cold climates but would perish in the tropics from excessive heat.Cells are incapable of acting as "liquid machinery" at temperatures below freezing and above boiling. The majority of cells, however, are still unable to function across the entire range of liquid temperatures. Variance in enzyme activity and protein denaturation are most closely related to variation in cells' capacity to vary in their tolerance to temperature, etc. at the molecular level in various animals.learn more about temperature tolerance here: https://brainly.com/question/13492803
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According to the principle of independent assortment, there is a _____ percent chance that any tall pea plant will produce either yellow or green peas.
According to the principle of independent assortment, there is a 50 percent chance that any tall pea plant will produce either yellow or green peas.
State law of independent assortment.The Law of Independent Assortment states that Separate traits' alleles are transferred from parents to children separately from one another.
Example: Mendelian dihybrid cross.
Basic principles of genetics
Principles of Paired FactorsPrinciple of DominanceLaw of Segregation or Law of Purity of Gametes (Mendel's First Law of Inheritance)Law of Independent Assortment (Mendel's Second Law of Inheritance).Learn more about law of independent assortment here:
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The amniotic fluid __________. Group of answer choices delivers food and oxygen to the developing organism helps keep the temperature of the prenatal world constant produces blood cells until the organs are mature enough to take over this function delivers nutrients and removes waste products
The amniotic fluid helps keep the temperature of the prenatal world constant.
Amniotic fluid surrounds the developing fetus inside the womb and protects the fetus from injury and temperature changes. It additionally lets in for freedom of fetal movement and permits musculoskeletal improvement.
Amniotic fluid is chargeable for: defending the fetus: The fluid cushions the infant from outdoor pressures, acting as a shock absorber. Temperature manipulation: The fluid insulates the child, maintaining it warm and preserving a normal temperature. contamination control: The amniotic fluid carries antibodies.
In the beginning, amniotic fluid is especially water with electrolytes, however, using approximately the 12-14th week the liquid also incorporates proteins, carbohydrates, lipids and phospholipids, and urea, all of which aid in the growth of the fetus.
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In order to study viruses in the environment, scientists isolate nucleic acids from an environmental sample, sequence them, and use computers to assemble genomes and compare them to known sequences in databases. This approach is known as _______.
In order to study viruses in the environment, scientists isolate nucleic acids from an environmental sample, sequence them, and use computers to assemble genomes and compare them to known sequences in databases. This approach is known as Metagenomics.
The study of whole nucleotide sequences that have been extracted and examined from all of the organisms (usually bacteria) in a bulk sample is known as metagenomics. Metagenomics is frequently used to investigate a particular population of microbes, such as those found in soil, water, or on human skin.The study of viral genetic material that is derived directly from the environment rather than from a host or natural reservoir is known as viral metagenomics. In research focusing on certain potential reservoirs, viral diversity in the environment is frequently overlooked. Without the need to isolate and grow viral species in the lab, it provides crucial information on virus evolution and the genetic diversity of the viral population.
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Two noncellular agents, smaller than viruses, are infectious RNA strands called ___ and infectious proteins called ___.
Two noncellular agents, smaller than viruses, are infectious RNA strands called virioids and infectious proteins called prions.
Virioids are irresistible specialists that comprise just of bare RNA with next to no defensive layer, for example, a protein coat. Viroids contaminate plants and are reproduced to the detriment of the host cell. Viroid genomes are little single-stranded circles of RNA that are just 250-400 bases in length.
A prion is a "proteinaceous infectious particle," a name that was abbreviated to "prion" simply a protein. Prions are proteins that can attack cells and some way or another direct their own duplication, making a greater amount of the separated proteins. Prions can enter the cerebrum through contamination, or they can emerge from mutation in the gene that encodes the protein.
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4. When and where would you expect to find the highest rate of primary productivity?
• A. In the polar regions during the summer months
• B. In the polar regions during the fall
O C. In the tropics during the fall
O D. In the temperate regions during the summer months
It is expected to find the highest rate of primary productivity in the tropics during the fall (Option C).
What is primary productivity?The expression 'primary productivity' makes reference to the amount of biomass produced in an ecosystem by producer autotrophic photosynthetic organisms such as plants.
Primary productivity largely depends on the process of photosynthesis by which producers can generate carbohydrates by means of solar radiation.
The measure of primary productivity of a particular ecosystem is defined by the amount of energy that is transformed by photoautotrophic organisms such as plants and algae.
In conclusion, it is expected to find the highest rate of primary productivity in the tropics during the fall (Option C).
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Which of the following is the correct process of genes working in protein synthesis?
I. mRNA moves from the nucleus to the cytoplasm.
II. Ribosome attaches to the mRNA.
III. DNA has been transcribed into mRNA.
IV. Protein is synthesized.
V. Assembles the amino acids.
A. IV, III, II, V, and I.
B. III, IV, I, V, and II.
C. II, III, IV, V, and I.
D. III, I, II, V, and IV.
Answer:
D. III, I, II, V, and IV.
Explanation:
1.) III. DNA has been transcribed into mRNA.
2.) I. mRNA moves from the nucleus to the cytoplasm.
3.) II. Ribosome attaches to the mRNA.
4.) V. Assembles the amino acids.
5.) IV. Protein is synthesized.
why is food chewed in the mouth
Answer:
The simple act of chewing food in your mouth helps to break down larger particles of food into smaller particles.This helps to reduce stress on the esophagus and thereby helps the stomach metabolize your food.Chewing your food properly can help in the smooth digestion and nutrient absorption.Explanation:
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The juxtaglomerular apparatus A. secretes renin in response to sodium depletion or plasma volume reduction B. consists of the proximal tubule and the ascending loop of Henle C. secretes aldosterone in response to sodium depletion or plasma volume reduction D. is a thickened region of specialized cells in the adrenal cortex supplied by the afferent and efferent arterioles E. changes IF osmolarity to increase the amount of water in the distal tubule
The juxtaglomerular apparatus A) secretes renin in response to sodium depletion or plasma volume reduction.
Blood pressure is maintained by the juxtaglomerular apparatus, which also serves as a quality control system to guarantee proper glomerular flow rate and effective sodium reabsorption. The juxtaglomerular cells produce renin and can alter the glomerulus's perfusion since they are specialized smooth muscle cells that surround the afferent arteriole.The blood pressure inside the afferent arterioles and the chloride content in the tubule fluid at the macula dense region of the distal tubule both directly affect renin release from juxtaglomerular cells in an inverse manner.learn more about juxtaglomerular apparatus here: https://brainly.com/question/9875334
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Based on your previous reading from Section 1.5 and after watching the video, which of the following groups (experimental or control) could create The Placebo Effect? Explain your response. Based on your previous reading from Section 1.5 and after watching the video, which of the following groups (experimental or control) could create The Placebo Effect? Explain your response.
Not much context given in this question, but I will try to explain as best to my ability.
The Placebo effect is a reaction to a placebo manifested by a lessening of symptoms or the production of anticipated side effects.
The placebo effect refers to when patients are placed in incorrect groups, which results in bias in all groups of the experiment. The placebo effect refers to an experiment where neither the participants nor the experimenters know who belongs to the treatment group and who belongs to the control group.
This is a brief explanation regarding the Placebo Effect.
If you have any more questions, just simply comment below the answer.
Cheers,
- ROR.
What key structure of the brain is involved in reward, motivation, and addiction?.
Answer:
Frontal lobes
Explanation:
The key structure of the brain that is involved in reward, motivation, and addiction is ventral tegmental area. The correct option is D.
The VTA is a part of the midbrain that is important to the reward system in the brain. It has dopamine-producing neurons that send signals to the prefrontal cortex and nucleus accumbens, among other parts of the brain.
Dopamine is released once the VTA is activated, which results in sensations of pleasure, motivation, and reinforcement.
Addiction can result from dysregulation of the reward pathways in the VTA because substances or actions that cause the release of dopamine in the VTA can strongly motivate usage or engagement even in the face of negative effects.
Thus, the correct option is D.
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Your question seems incomplete, the probable complete question is:
What key structure of the brain is involved in reward, motivation, and addiction?.
a) Cerebellum
b) Hippocampus
c) Prefrontal cortex
d) Ventral tegmental area (VTA)
Agriculture developed independently in different areas of the world. because different kinds of plants grow in different regions, early farmers ended up growing different crops. which region grew wheat and barley?
Sulaiman and Kirthar hills are the locations where wheat and barley were sown first.
Which region grow wheat and barley first?The areas where people first began to grow crops i.e. wheat and barley were located in the regions of Sulaiman and Kirthar hills about 8000 years ago.
So we can conclude that Sulaiman and Kirthar hills are the locations where wheat and barley were sown first.
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How many different types of gametes could an organism with the genotype aabbcc produce?.
An organism with genotype aabbcc will produce only one type of gamete i.e., abc.
An organism's genotype is made up of all of its genetic components. The alleles or variations that an individual carries in a specific gene or genetic region are also referred to as the genotype. Eye color is encoded by a gene. The allele in this instance can either be brown or blue, with one coming from the mother and the other from the father.every letter represents an allele, hence a, b and c are different alleles on the same locus. all alleles exist in pairs hence this makes up the genotype as aabbcc.on crossing two individuals with genotype aabbcc the following results are obtained:aabbcc X aabbcc
aabbcc, aabbcc, aabbcc, aabbcc
hence an organism with aabbcc genotype will only produce abc gametes.
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Living systems
a) violate the first law of thermodynamics.
b) decrease their entropy while increasing the entropy of the universe.
c) are only compelled to follow the first law of thermodynamics
d) are examples of a closed system
e) violate the second law of thermodynamics
Living systems are examples of a closed system, as they have an organism and unit configuration.
What is a closed system example?A closed system is one in which only energy is transferred and not any matter. Earth is considered the best example of a closed system as it only transfers energy and not matter around its atmosphere. And it is a natural process that is happening in and around the Earth.
With this information, we can conclude that Living systems are examples of a closed system, as they have an organism and unit configuration.
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I need help with this question
Answer:
It's B
Explanation:
Answer:
B is the answer of the question a '
Eukaryotic' cell
For each statement below, identify the career described.
covers any field in which instruments or processes are created to go along with
biomedical technology
covers any field dealing with medicine, the creation of medicine, and the provision
of supplies for the medicine to be used
covers any field that helps in analyzing DNA and identifying individuals from DNA
samples taken from crime scenes
Engineering uses instruments created by biomedical technology, pharmaceutical covers fields in medicine and forensics helps in analyzing DNA.
What is forensic sciences?Forensic sciences are aimed at identifying DNA samples in a crime scene, whereas engineers create biomedical devices.
Finally, pharmaceuticals are medical professionals that identify drugs and they are able to organize them.
In conclusion, Engineering uses instruments, pharmaceutical covers medicine areas and forensics analyze DNA.
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Oxidative phosphorylation uses ALL of the following for energy production EXCEPT: Group of answer choices electrons from NADH. glycolysis. membrane-associated electron transport chain. an ATP synthase. a proton motive force.
Oxidative phosphorylation uses ALL of the following for energy production EXCEPT Glycolysis.
The inner membrane of the mitochondria contains a number of chemical compounds and proteins that make up the electron transport chain.In a sequence of redox reactions, electrons are transferred from one component of the transport chain to another.In these processes, energy is released as a proton gradient, which is then utilized to produce ATP through a process known as chemiosmosis.Oxidative phosphorylation is a process that involves both chemiosmosis and the electron transport chain.The catalytic action of ATP synthase, which phosphorylates ADP to produce ATP, is driven by the current of hydrogen ions.hence, all are involved in ETC except glycolysis. Glycolysis is a completely different step of cellular respiration.learn more about Oxidative phosphorylation here: https://brainly.com/question/28018428
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The percentages of naturally occurring elements making up the human body are similar to the percentages of these elements found in other organisms. How could you account for this similarity among organisms
All living things have basic needs in common, and these needs are met in certain ways that require trace elements.
Of the 92 evidently taking place factors, living matters are composed of best approximately 26, and six of these 26 make up practically all the weight of most living matters. The other 20 elements crucial for lifestyles are found in very small amounts, some in such tiny amounts that they're targeted without a doubt as "trace factors".
The human frame is about 99% constituted of just six factors: Oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. Any other 5 elements make up approximately 0.85% of the closing mass: sulfur, potassium, sodium, chlorine, and magnesium.
Despite the fact that aluminum and silicon are considerable in the earth's crust, they're discovered in hint amounts within the human body. Different hint factors encompass metals, that are regularly cofactors for enzymes. Trace factors include iron, cobalt, zinc, iodine, selenium, and fluorine.
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Lab: Mineral and Rock Classification
Answer:
are minerals found on earth and rocks
do you think the biodiversity is as high in a city park as it is in a rainforest?why or why not?
No, the biodiversity is not as high in a city park as it is in a farm or rainforest
because, in an urban city park, only the species with the most general habitat and resource requirements have generally remained in the urban park.
What is Biodiversity ?“Biodiversity” not only refers to the number of individual species, but also the genetic variety within and between species and the diversity of ecosystems and regions.
City Parks are less likely to have biodiversity richness as compared to a farm or a rainforest.This is because these parts are artificially created and a lot of naturally occurring flora and fauna are modified in the process. This results in dilution of biodiversity-rich place.Learn more about Biodiversity here:
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The main difference between meiosis I and meiosis II is that _____ in meiosis II.
A. no new DNA is created
B. cytokinesis is not involved
C. no spindle fibers form
D. the nuclei do not divide
Answer:
A
Explanation:
formulate a theory about one aspect of human development and a hypothesis that relates to it
A theory is that human species is evolutionary linked to apes and one hypothesis may be the association of this process with certain homologous structures.
What is the evolution theory?The evolutionary theory is a scientific theory that explains how organisms evolve from a common ancestor.
This theory can be used to explain the presence of homologous strictures between humans and primate during embryonic development, which may be verified by establishing hypotheses that can be confirmed by experimental procedures.
In conclusion, a theory about one aspect of human development is we are evolutionary linked to apes and one hypothesis is it is associated with certain homologous structures.
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Single Strand Binding Proteins are responsible for:
A. linking the short sections of the lagging side.
B. unwinding and separating the DNA strands.
C. keeping the strands separated during replication.
D. adding the new bases.
Answer:
C. keeping the strands separated during replication.
I think
Explanation:
When the charge builds up inside the thylakoid, this drives the formation of ATP from (blank) and (blank). This process is called chemiosmosis.
(blank) PGAL are used to make (blank), while the remaining 10 PGAL are
rearranged to form more (blank), then the Calvin cycle starts all over.
Free energy and proton drives the formation of ATP molecules inside the thylakoid.
How ATP is formed in chemiosmosis?When the charge builds up inside the thylakoid, this drives the formation of ATP from free energy and proton. The hydrocarbon skeleton of PGAL is used to form fatty acids and glycerol.
PGAL are used to make energy molecules, while the remaining 10 PGAL are rearranged to form more ATP molecules.
So we can conclude that free energy, proton, fatty acids and glycerol are the correct answers for the given blanks.
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When there is not enough carbon dioxide in a plant, a process called photorespiration may occur. This process uses the excess oxygen in the plant, uses energy, and prevents the Calvin cycle from occurring. How would a prolonged period of photorespiration affect a plant?
- A pex honors bio
A prolonged period of photorespiration would affect a plant, giving a significant evolutionary advantage to plant species in dry climates.
What is the difference between photorespiration and respiration?One of the basic differences between photorespiration and respiration concerns the effect of O2 on the two processes. Respiration saturates when O2 reaches approximately 2%, while photorespiration does not reach saturation in a pure O2 atmosphere.
Under what conditions does photorespiration occur?Photorespiration is an expensive metabolic pathway that occurs when the Calvin Cycle enzyme rubisco acts on oxygen instead of carbon dioxide.
With this information, we can conclude that A prolonged period of photorespiration would affect a plant, giving a significant evolutionary advantage to plant species in dry climates.
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Each breed of dog is known to be susceptible to certain illnesses, such as heart problems, eye disorders, or thyroid problems. Often, dog breeders will go to great lengths to breed a dog that's unrelated to a dog they want to breed. This is because
Dog breeders make great efforts to breed dogs that are unrelated to the dog they are trying to breed. This is because closely related individuals are likely to share the same harmful gene.
Breeding is the intentional collection of dogs during the breeding season to allow the animals to mate and give birth. Do not underestimate the variety.
Most breeders recommend waiting for dogs to breed until they are at least 18 months old. Most strains are fully grown at this point, limiting the potential for complications. However, many very small varieties can grow after a year.
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hysiologic dead space Multiple Choice Anatomic dead space lost alveoli Anatomic dead space air in the respiratory zone Anatomic dead space air in the alveoli Air in the alveoli air in the conducting zone
Physiological dead space comprises of anatomic dead space) + (alveolar dead space) in the respiratory zone.
Air that is present in the conducting airways, in terms of volume is the anatomic dead space.Inhaled air entering this area of the lung cannot participate in gas exchange because alveolar capillaries are blocked (e.g., by a pulmonary embolism), therefore it behaves just like air entering the conducting airways. The amount of respiratory zone air that is not involved in gas exchange, known as physiologic or total dead space, is equal to anatomic plus alveolar dead space. The respiratory bronchioles, alveolar duct, alveolar sac, and alveoli make up the respiratory zone.The figure shows empty space. Anatomic dead space is represented by the volume of gas just in the airways i.e., gas close to the respiratory bronchiole, including gas in the mouth, nose, and ventilator tubing where no gas exchange is possible.learn more about Physiological dead space here: https://brainly.com/question/9734216
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A neuron has received enough stimulation to fire an action potential; it also has been treated with TEA, a K channel blocker. Which outcome is possible
The cell will initially depolarize, but repolarization will be considerably more difficult because it solely uses ion pumps.
How will the action potential affected and remove external K+? There will be an increase in the membrane potential. Na+ leaves the cell along a gradient of concentration, reflecting an early outward current.It makes the falling phase possible, enabling the action potential to complete its cycle.Action potentials are produced when certain ions pass the neuronal membrane. A stimulation causes the sodium channels to initially open. Sodium ions rush inside the cell because the inside of the neuron is more negatively charged than the outside and contains a greater number of sodium ions.Learn more about neuron here:
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