A denisty of a bottle weighs 0.25N when empty & 0.75N when filled with water & 0.65N when filled with alcohol. Calculate;. 1) the volume of the bottle 2) the denisty of the alcohol (denisty of water is 1000kg/m & g is 10m
Answers
Answer:
\(0.05\times 10^{-3}\ \text{m}^3\)
\(800\ \text{kg/m}^3\)
Explanation:
\(W_b\) = Weight of bottle = 0.25 N
\(W_w\) = Weight of water = \(0.75-0.25=0.5\ \text{N}\)
g = Acceleration due to gravity = \(10\ \text{m/s}^2\)
\(\rho_w\) = Density of water = \(1000\ \text{kg/m}^3\)
Mass of water
\(m_w=\dfrac{W_w}{g}\\\Rightarrow m_w=\dfrac{0.5}{10}\\\Rightarrow m_w=0.05\ \text{kg}\)
Volume is given by
\(V_w=\dfrac{m_w}{\rho_w}\\\Rightarrow V_w=\dfrac{0.05}{1000}\\\Rightarrow V_w=0.05\times 10^{-3}\ \text{m}^3\)
Volume of the bottle is \(0.05\times 10^{-3}\ \text{m}^3\).
This means that the alcohol will take the same amount of volume.
\(W_a\) = Weight of alcohol = \(0.65-0.25=0.4\ \text{N}\)
Mass of alcohol
\(m_a=\dfrac{0.4}{10}\\\Rightarrow m_a=0.04\ \text{kg}\)
Density is given by
\(\rho=\dfrac{m_a}{V_w}\\\Rightarrow \rho=\dfrac{0.04}{0.05\times 10^{-3}}\\\Rightarrow \rho=800\ \text{kg/m}^3\)
Density of alcohol is \(800\ \text{kg/m}^3\)
The volume of the bottle is 50 mL and the density of alcohol is 0.8 g/c\(m^{3}\)
The weight of empty bottle is 0.25N
the weight of bottle filled with water is 0.75N
therefore, the weight of water in the bottle is 0.75N - 0.25N = 0.50N
we know that weight, w =mg , where m is the mass of substance and g is acceleration due to gravity. Here we will take g= 10 m/\(s^{2}\) for simplicity.
⇒ m = w/g = 0.5/10 = 0.05 kg
⇒ mass of water is 50g
now, the density of water ρ(w) = 1g/\(cm^{3}\) = 1g/mL
relation between mass, density and volume is:
V = m/ρ = 50/1 = 50mL
Hence the volume of the bottle is 50mL.
Now it is given that the weight of bottle filled with alcohol is 0.65N
⇒ weight of alcohol = 0.40N
⇒ mass of alcohol = 0.40/g = 0.40/10 = 0.040kg = 40g
The volume of the bottle remains the same, so to calculate the density of alcohol we use the above mentioned relation between mass, density, and volume on alcohol.
That is, V = m/ρ
⇒ ρ(al) = m/V = 40/50 g/c\(m^{3}\)
ρ(al) = 0.8 g/c\(m^{3}\) or 0.8 g/mL
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Related Questions
Questions: Using what you have learned in the lesson and the experiment,
answer the following questions in complete sentences. Do not copy and paste
from any source! Your answers should be in your own words
1. Explain what makes a scientific experiment reliable. Be sure to include at least
three reasons to support your answer. (Review page 4) exploring life lab report
Answers
An experiment is dependable when its repetition yields the same result every time. Peer review is essential in scientific research since it guarantees that there is no misleading data that could lead to incorrect results.
Reliability is a concept used in science to assess the quality of research. The probability that an experiment or result is true, hence preventing and mitigating failures over time, is referred to as reliability.
A trustworthy experiment is one in which successive repetitions provide the same outcome.
Three examples of scientific dependability:
The same as the length of a spider's legThe observation of the same behaviour of bird populations on multiple days and times of day when the byproducts of a given chemical process are the same.An experiment is dependable when its repetition yields the same result every time.
Peer review is essential in science since it guarantees that there are no false dates experiment is repeated two or more times.Peer review is the most extensively utilized method for validating scientific findings. This method (peer review) is critical for advancing scientific understanding.Before a scientific paper is published, independent scientists analyze its originality, dependability, and relevance through peer review.
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how does the mitochondria produce energy for the cell worksheet answers
Answers
Answer:
How does the mitochondria produce energy for the cell answers key?
Explanation:
Mitochondria are the powerhouses of the cell because they "burn" or break the chemical bonds of glucose to release energy to do work in a cell
Cyanobacteria are important to the evolution and advancements of other life on Earth because they
options:
were the first lifeform on earth.
produced oxygen from photosynthesis.
were thought to have become mitochondria in the cells of animals.
were the first group of organisms to leave a fossil record.
Answers
Answer: b
Explanation: I took the test
Cyanobacteria are important to the evolution and advancements of other life forms on Earth because they: B. produced oxygen from photosynthesis.
What are cyanobacteria?Cyanobacteria is scientifically referred to as Cyanophyta and it can be defined as a group of single-celled, prokaryotic photosynthetic bacteria that live in aquatic habitats (water) and moist soils.
Additionally, this division of microorganisms are capable of manufacturing their own food through a process known as photosynthesis, which typically leads to a release of oxygen into the ecosystem.
In conclusion, Cyanobacteria are very important to the evolution and advancements of other life forms on planet Earth because they help in the production of oxygen through photosynthesis.
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All of the following are functions of the cell membrane EXCEPT:
A. To provide the cell with structure and protection from the external environment
B. To control the expression of genes
C. To control what enters and exits the cell in order to maintain homeostasis
D. To be involved in cell to cell signaling and communication
Answers
Answer:
Answer D
Explanation:
It's not answer A because that is the main goal of the cell membrane.
It's also not answer B because at first glance, you may think that this is the goal of the nuculeus, HOWEVER, this is also the perpous of the cell membrane.
Finally, its not answer C because that is just answer A, but reworded to make it sound different.
The answer is answer D because communicating between cells is the goal of the Endoplasmic Reticulum, aka the ER.
mr. and mrs. smith have three sons in elementary school. two of their children are progressing normally, but their youngest son, charles, has been much slower than his siblings in developing speech and language skills. his parents are concerned that he has a learning disability and decide to investigate further. since some learning disabilities can be genetically based, their pediatrician recommends a chromosomal analysis. the results show that charles has a trisomy of the sex chromosomes, diagnosed as xyy. a mistake during sperm formation resulted in an extra copy of the y chromosome. the extra copy was passed on to charles during fertilization. most often, this chromosomal change causes no unusual physical features or medical problems, but those with trisomy of the sex chromosomes may have a higher-than-normal risk of delays in learning development. during which stage of meiosis could this mistake have occurred?
Answers
How are i actic acid formation and alcohol fermentation different from each other?
Answers
Answer:
In lactic acid fermentation, pyruvate is reduced to lactic acid. ... In alcoholic fermentation, pyruvate is reduced to alcohol and releases carbon dioxide. This type of fermentation is commonly used with yeast to make alcoholic beverages and cause bread to rise
Explanation:
Which of the following scenarios would MOST LIKELY lead to a change in DNA that would increase genetic variation in the individual’s offspring? An A - T base pair changes to a C - G base pair during mitosis in a liver cell of a young man. A virus inserts nine base pairs into a lung cell of an elderly man. UV radiation mutates the skin cells of a pregnant mother, changing two G bases to T bases. A G - C base pair changes to an A - T base pair randomly in a young woman's egg cell during meiosis.
Answers
The scenario that would most likely lead to a change in DNA that would increase genetic variation in the individual’s offspring is when a G-C base pair changes to an A-T base pair randomly in a young woman's egg cell during meiosis. The last option is correct regarding mutation.
What happens to the mutation in the reproductive organs?The mutations that happen to the reproductive organs, such as the ovary of the female and the testes of the male, have a higher chance of being inherited by the next generation. Because it occurs in the ovum, this type of mutation is inheritable.
Hence, the last option is correct because it states that a change in DNA that would increase genetic variation in the individual’s offspring is when a G-C base pair changes to an A-T base pair randomly in a young woman's egg cell during meiosis.
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if phosphorous concentrations were to suddenly increase in a marine ecosystem, which of the choices would likely occur? decreased primary productivity no change in the rate of primary productivity increased primary productivity
Answers
If phosphorous concentrations were to suddenly increase in a marine ecosystem it will lead to increased primary productivity.
Phosphorus has a very important role in the growth, maintenance and repair of the living organisms. It plays a key role in how the organisms uses carbohydrates and fats . In human and other animals it also have a role in the formation of bones and teeth.
It is usually considered as a limiting nutrients in marine ecosystem as they don't have access to adequate amount of phosphorus for the growth and repair.
If the concentration of the phosphorus is suddenly increased the primary productivity of the marine system is also going to increase.
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where does squid fit into the marine food web
Answers
Squid are important predators in the marine food web and occupy a significant ecological niche as both predator and prey.
Squid are carnivorous and feed on a variety of prey, including small fish, crustaceans, and other cephalopods. They are themselves preyed upon by a range of predators, including larger fish, marine mammals, and seabirds.
Squid play a critical role in transferring energy through the food web, as they are an important food source for many larger marine predators.
They also help to control populations of their prey, which can help to maintain ecological balance in marine ecosystems.
In addition to their ecological importance, squid are also commercially valuable as a food source for humans. They are harvested by commercial fisheries around the world, and are an important source of protein for many coastal communities.
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I NEED HELPPPP PLEASEEEEEE :OOOOO
Answers
Answer:
lolololololololopolololololololoolol
Answer and Explanation:
With??
(´･ω･`)?
In these experiments, researchers are taking brain cells from patients with disorders like autism and schizophrenia and using them to grow tissue which produce organoids miniature versions of the body's organs. How might studying these brain organoids help patients with these disorders?
Answers
Answer:
It could help in knowing in detail the etiology of the pathology, in order to evaluate the prognosis and its most appropriate treatment.
Explanation:
When cultivating the cells, it is possible to observe if they worsen the pathology before certain means or stimuli, or even the consumption of drugs and derivatives.
Not only with that, the beginning of this pathology is called etiology, when the etiology is studied in detail, the ideal treatment is the one that is determined, since the focus to attack is known so that these pathologies do not advance or even revert .
If it wasn't for the Sun and the ___ cycle, our current atmosphere might not exist, and weather on Earth would be minimal.
A. Water
B. Carbon
C. Oxygen
D. Nitrogen
Please give an explanation
Answers
Answer:
B. Carbon cycle
Explanation:
The operation of the carbon cycle is one of the most important in this regard as it ultimately controls levels of oxygen and carbon dioxide in the atmosphere. The carbon cycle is responsive to changes in climate and oceanography and is coupled to nutrients cycles.
Patrick met Patti at the dance. Both of them are heterozygous for their pink body color, which is dominant over a yellow body color. Create a Punnett square to show the possibilities that would result if Patrick and Patti had children.List the possible genotypes and phenotypes for their children.What are the chances of a child with a pink body? ____ out of ____ or ___%What are the chances of a child with a yellow body? ___ out of ___ or ___%
Answers
If they are heterozygous and pink is dominant over yellow, this means that both Patrick and Patti have the following genotype: Pp.
Therefore, we should create a Punnet square crossing Pp x Pp, as follows:
There are one PP (homozygous dominant), two Pp (heterozygous) and one pp (homozygous recessive) in the diagram. So PP represents 1/4 (or 25%), Pp represents 2/4 (or 50%) and pp represents 1/4 (or 25%).
It is important to note that PP and Pp both will lead to a pink color, and only pp will lead to a yellow color.
Therefore:
The chances of a child with a pink body are three out of four, or 75%
The chances of a child with a yellow body are one out of four, or 25%
How important is DNA to Law enforcement? Should arrested (not convicted Individuals) be forced to provide DNA samples to the police?
Answers
DNA is incredibly important to law enforcement for several reasons. It serves as a valuable forensic tool that can be used to identify individuals, establish connections between suspects and crime scenes, and provide crucial evidence in criminal investigations.
DNA analysis has revolutionized the field of forensic science and has helped solve numerous cases, including cold cases and wrongful convictions.
However, the question of whether arrested individuals (not convicted) should be forced to provide DNA samples to the police is a complex ethical and legal issue. Different jurisdictions have different laws and regulations regarding the collection and retention of DNA samples from arrested individuals.
Supporters of DNA collection from arrestees argue that it can aid in solving crimes and preventing future offenses by identifying potential repeat offenders or linking them to unsolved cases. They contend that DNA collection at the time of arrest is analogous to other routine identification procedures like fingerprinting and photographing, which are commonly accepted and practiced.
On the other hand, opponents argue that requiring DNA samples from arrested individuals infringes upon their privacy rights and presumption of innocence. They express concerns about potential abuse, such as the misuse of DNA samples or the expansion of databases beyond the scope of serious crimes. Additionally, there are concerns about the disproportionate impact on marginalized communities and the potential for racial or ethnic profiling.
The approach to DNA collection from arrested individuals varies across jurisdictions, reflecting differing legal and constitutional considerations. Some countries or states allow DNA collection upon arrest for certain serious offenses, while others restrict it to convicted individuals or limit it to specific circumstances.
Ultimately, the decision regarding DNA collection from arrested individuals involves balancing the need for effective law enforcement with protecting individual rights and privacy. It requires careful consideration of the legal framework, scientific advancements, societal values, and potential risks associated with the use and retention of DNA samples.
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What are the answers to these?
Answers
During translation, the sequence of 3 bases on mRNA, otherwise known as codons, are translated into their respective amino acids and linked by peptide bonds to form the primary structure of proteins.
The tRNA carries the anticodon and the amino acids that correspond to each codon on the mRNA. As soon as the anticodon on a particular tRNA matches the codon on the mRNA, the amino acid is dropped and the next codon on the mRNA is read. This cycle continues until the stop codon is reached.
Successive amino acids are linked together by peptide bonds to form proteins.
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what are two function of bile juice
Answers
Answer:
It aids in digestion, absorption, excretion, hormone metabolism and other functions. Bile juice is a digestive fluid produced by the liver. It is stored and concentrated in the gallbladder. Its main function is to convert fats in food into fatty acids, which are absorbed in the gut.
Explanation:
(1)The bile juice works as a medium to break down fats from larger parts to smaller parts of body for digestion. (2)The bile juice also functions as a substance that eradicates the germs from the food, making it more hygienic for our body.
how is the overexploitation of resources in an environment likely to affect future generations 
Answers
The overexploitation of resources in an environment likely will affect future generations because it alters the homeostatic equilibrium of an ecosystem.
What is the homeostatic equilibrium of an ecosystem?The homeostatic equilibrium of an ecosystem is a delicate balance that can be broken down by irrational use of natural resources and this irreversible alters the features of an ecosystem.
Therefore, with this data, we can see the homeostatic equilibrium of an ecosystem is delicate and we need to care about this in order to maintain sustainable goals for future generations.
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When you make a decision to scratch your nose or pick up your pencil from the desk, which part of your nervous system makes that happen?
o Autonomic
Peripheral
O Sympathetic
O Parasympathetic
Answers
Explanation: Peripheral nervous system
consists of nerves and ganglia (located outside the CNS). Connects the CNS with the rest of the body. Functionally
branches into somatic, and autonomic nervous system. Structurally divided into cranial nerves and spinal nerves.
How do fats and phospholipids differ?
Fats composed parts of cell membranes and phospholipids do not.
Phospholipids store more energy than fats.
Fats and phospholipids have different numbers of fatty acid tails.
Fats are hydrophilic and phospholipids are hydrophobic.
Answers
Answer:
C - Fats and Phospholipids have different numbers of fatty acid tails.
Explanation:
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Migration of animals in the savanna is mostly a response to.
Answers
The reason for migration can be rainfall,
because some herbivores follow the rain to new sources of water and grass. Also, predators migrate because they follow some animal migrants that are used for food, so predation is one of the reasons that lead to migration.
Which process can occur in both mitosis and meiosis?
Answers
DNA replication and condensation, nuclear membrane degradation, spindle formation, chromosomal segregation and nuclear reformation.
ExplaAnswer:nation:
Answer:
Gene mutation
Explanation:
Mutations are changes in the DNA strand that are capable of being inherited.
name 3 organisms that would be classified as eukaryotic and unicellular
Answers
Answer:Try protozoa, unicellular algae, and unicellular fungi.
Explanation:
1. which of the following statement describe how the prokaryotic cells appear compared to the eukaryotic cells? A. the prokaryotic cells have cell membrane will the aquatic cells do not. B. the prokaryotic cells have a nucleus while the aquatic cells do not. C.the prokaryotic cells are much smaller than the aquatic cells D. the prokaryotic cells have cytoplasm and ecori attic cells do not.
2. Does a prokaryotic cell have a cell wall?
Answers
The prokaryotic cells appear much smaller than the aquatic cells when compared to the eukaryotic cells.
Prokaryotes are one of the oldest groups of living organisms on the planet, with fossil records dating back nearly 3.5 billion years. Prokaryotic cells are those that lack a true nucleus or membrane-bound organelles. These are microbes with one cell. Bacteria and Archaea are examples of prokaryotes, while cyanobacteria are examples of photosynthetic prokaryotes.
Eukaryotes are larger and more complex than prokaryotes. Except for Kingdom Monera, they include almost all of the major kingdoms.
Eukaryotes have a cell wall, which supports and protects the plasma membrane. The plasma membrane surrounds the cell and regulates the entry and exit of various substances.
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when muscle tissue dies it usually is replaced with dense irregular collagenous connective tissue
Answers
When muscle tissue dies, it is usually replaced with dense irregular collagenous connective tissue. This process is known as fibrosis, which is the growth of fibrous tissue to replace damaged or injured tissue.
Dense irregular collagenous connective tissue is composed of collagen fibers that are densely packed, providing strength and stability to the area where it is formed.When muscle tissue dies, the muscle cells are replaced by fibroblasts, which produce collagen fibers. These fibers are organized in a random pattern, leading to the formation of dense irregular collagenous connective tissue.
This tissue is typically less flexible and has a reduced ability to contract compared to muscle tissue.Over time, the formation of dense irregular collagenous connective tissue can lead to a reduction in muscle function. The loss of muscle tissue can also result in a loss of strength and mobility, which can have a significant impact on a person's quality of life. In some cases, physical therapy or surgical intervention may be necessary to help improve muscle function and restore mobility.
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Which statement describes what is most likely to occur once equilibrium has been established?
Choose 1 answer:
a) More molecules will be found at the bottom half of the box as compared to the top
half.
b) More molecules will be found at the top half of the box as compared to the bottom
half.
c) The molecules will no longer move across the membrane and their overall
distribution will remain equal on both sides of the membrane.
d) The molecules will continue to move across the membrane, but their overall
distribution will remain relatively equal on both sides of the membrane.
Answers
Answer:
the molecules will no longer movie across the membrane and their over all distribution will remain equal and both sides of the membrane is a right answer please brainliest answer
Answer:
The molecules will continue to move across the membrane, but their overall distribution will remain relatively equal on both sides of the membrane.
Explanation:
this is the right answer on khan the other guys that answer this question is wrong
I need desperate help.
Answers
Answer:
Fish make up the largest group of vertebrates.
Explanation:
"Numerous" means a count of something. The second option is the only one that mentions a count of something so that is most likely the answer.
you discover that the urine contains a high concentration of salts. what is your prediction for the fishs habitat
Answers
The high concentration of salts in the fish's urine indicates that the fish is likely living in a saltwater environment. Saltwater fish excrete excess salt through their urine to maintain a proper balance of salt and water in their bodies.
Based on this information, it can be predicted that the fish's habitat is a saltwater environment, such as an ocean or a saltwater lake. These environments have high levels of salt, which is essential for the survival of saltwater fish. The high concentration of salts in the fish's urine is a natural adaptation that allows them to thrive in these environments.
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Look at the Luminosity vs. Period graph. Notice that a the
period of a Cepheld variable increases, so does its luminosity. A luminosity of 4,000 Suns means that the star Is 4,000 times
brighter than the Sun.
8000
Mean luminosity (Suns)
6000
4000
2000
Period (days)
10
15
20
If the luminosity of a st
s 6000 suns, what is its period in days?
Answers
Answer:
yes
Explanation:
Kwashiorkor is a form of malnutrition caused by a lack of protein in the diet, most often seen in regions experiencing famine (hunger). Explain why this lack of protein is especially harmful for children.
Answers
Answer:
Explanation:
Proteins are macromolecules that are important in the development and repair of bones and tissues. Since good sources of proteins are made up of essential amino acids, they contribute greatly to the well being of children based on the roles of these essential amino acids.
When children do not have this protein there diet, they could have stunted growth and weak bones (due to absence of protein for bone and tissue development), fatigue (absence of protein for development of muscle thus not enough glycogen is stored in the muscle cells), slowed/stunted growth (absence of proteins for the development of bones and tissues) and this children also have reduced immunity because of the absence of proteins which releases amino acid for immune/antibody formation.
In most organisms, ___________ macromolecules play a central role as the energy source. This macromolecule must be transformed in the body to produce the usable energy molecule ______. Interestingly, this energy molecule is a _________ type of macromolecule.
A
carbohydrate, adenosine triphosphate, nucleic acid
B
lipid, atropine tetraphosphate, protein
C
protein, adenosine triphosphate, lipid
D
carbohydrate, atropine triphosphate, protein
Answers
Answer:
A
carbohydrate, adenosine triphosphate, nucleic acid
Explanation: