Answer:Independent Variable
A variable that you (the scientist) changes and you have control over. The factor being tested in an experiment.
Dependent Variables
Factor(s) that change in response to other factors. It's what your measuring in your experiment to see whether or not the independent variable made an impact. This is what the scientist focuses their observations.
Explanation:
Answer:
one is control in scientific experiment while the other is being tested
Explanation:
The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.
Identify the base in this acid-base reaction
2HC H202 + Mg(OH)2 → Mg(CH302)2 +2120
HC2H302
Mg(OH)2
Mg(C2H302)2
Answer:
[tex]Mg(OH)_2[/tex] is the base in the reaction.
Explanation:
[tex]Mg(OH)_2[/tex] which is Magnesium hydroxide is a base because of the presence of Hydroxide ion. The pH of this magnesium hydroxide is 10 approximately. It is a strong electrolyte and has less solubility. Because of less solubility it becomes a weak base. This magnesium hydroxide is called as Milk of magnesia.
Acetic Acid + Magnesium Hydroxide = Magnesium Acetate + Water
[tex]2HC_2H_3O_2 + Mg(OH)_2 = Mg(C_2H_3O_2)_2 + 2H_2O[/tex]
This is double displacement acid base reaction. Thus the reactant side must have an acid and an base. We could see that acetic acid is present hence Magnesium hydroxide must be the base involved in the reaction
Answer:B mg(oh)2
Explanation:
need this asap no rocky
Answer:
carp
Explanation:
What would most likely be included in the "Analysis" section of a lab report?
Complete Question:
What would most likely be included in the “Analysis” section of a lab report?
1) a discussion of any errors in the experimental data
2) a list the supplies that were used in conducting the experiment
3) suggestions for new experiments based on the results
4) a description of what the dependent and independent variables were
Answer:
1). a discussion of any errors in the experimental data.
In the analysis section of the lab report, after analyzing and investigating the data, errors are identified in the experimental data. Furthermore, discussion carried out to point out those error occurred in the data. In an analysis process discussion is carried out to find the errors in the whole process. In this process all facts and figure are gather to inquire if there are any errors or mistake present in the final values or final result. Analysis section in a lab report has a key role because it make sure that the final result is error free.
what is the evalution of managment
Answer:
Evolution of management is the concept that was developed in the early days of men when the realization was made that we must live in groups for the survival.
Explanation:
Since men saw and realized that they need to live in groups, mighty men in the past were able to organize the masses, share them into various groups. The sharing was done accord to the masses' strength, mental capacities and intelligence.The evolution of management section is mainly divided into four sections: Early Management ThoughtThe Scientific Management EraThe Social Person EraThe Modern EraAccording to the law of conservation of matter, matter is never created or destroyed. Yet in a food pyramid the amount of
biomass decreases as we move up through the pyramid, from producers to top level consumers. Why?
In a food pyramid the amount of biomass decreases as we move up through the pyramid, from producers to top level consumers because, Matter changes to other forms that might not continue to be a part of the same food chain.
Explanation:
It is essential for any living organism to maintain a good health for survival. The good health refer in attaining the necessary nutrients. This can be achieved using the Food pyramid. This helps in getting the nutrients at accurate amount that is helpful in maintaining a good health. There are similar types of nutrients that exists in a food type. These are classified under one group and they form the food pyramid.
Producers are those that have ability to make food for them on their own. For example plants. Plants can get carbon dioxide from atmosphere prepares food for them through photosynthesis process and releases oxygen that helps humans to survive. Consumers are those that depends on something for their food. In a food pyramid, when we move upwards, as the matter changes its forms, which will not sometime become a part of similar food chain, there will be a decrease in the biomass amount.
How to make the Punnett square
Answer:
Genotype Phenotype
TT - 1/4 homozygous tall tree- 1/4
Tt- 2/4 heterozygous tall tree-2/4
tt-1/4 homozygous short tree-1/4
explain some of the various medieval literary forms. why were writers employing these literary forms?
Answer:
Medieval poetry, medieval drama, medieval allegory, medieval mysticism, medieval travel literature are some forms of medieval literature. The writers employed these forms to expand the boundaries of literature disciplines.
Explanation:
The discipline of literature can be referred to as the most ancient of all knowledge disciplines. It is because the art of literature existed, humans could grow through understanding. The medieval literature was rich in content and spoke mostly about contemporary ideals, values, lifestyles, thoughts, etc.An albino woman has 8 children with the same ma. 5 of which are albino. What is the fathers genotype?
Answer:
3 is the father's genotype.
Explanation:
May this answer help you !!!!
A group of runners gathers every week to train for long-distance runs. Several students in your anatomy class are part of this group. Your classmates are curious about the physiological changes that occur with exercise. You do a little research in class and find several changes occur as exercise begins. Which of these correctly lists the changes that occur as exercise begins?
A) increased vasodilation, increased cardiac output, increased venous return
B) decreased vasodilation, decreased cardiac output, decreased venous return
C) increased vasodilation, decreased cardiac output, increased venous return
D) increased vasodilation, increased cardiac output, decreased venous return
Increased vasodilation, increased cardiac output, decreased venous return occurs during exercise.
Option D.
Explanation:Exercise is a condition where the body works more than normal, leading to more consumption of nutrients and oxygen in the active muscles of body. The exercise also produces a lot of carbon dioxide in the muscles.
The increase in carbon dioxide and the need of oxygen and nutrients in the muscles lead to the para sympathetic stimulation which leads to the increase in vasodilation. This increase in vasodilation leads to reduced peripheral resistance which in turn reduces the venous return.
While, heart has sympathetic stimulation which causes the heart rate to increase and as a result cardiac output to increase too. But due to reduced venous return, the stroke volume increases up to a certain limit from where it remains still, because of the reduced blood in heart.
Answer:
A) increased vasolidation, increased, cardiac output, increased venous return
Explanation:
did it on usatestprep
s-waves cannot travel through liquids,including earths?
Answer:
Shear waves cannot travel in liquids or gases -- so, for example, S waves don't travel through the ocean or through the outer core. Surface waves are called surface waves because they are trapped near the Earth's surface, rather than traveling through the ``body'' of the earth like P and S waves.
Explain what happened genetically in the insect population over time as the insects were exposed to pyrethroids.
Answer:
The insects developed pyrethroid resistance.
Explanation:
Pyrethroid Insecticides:
Pyrethroids are synthetic derivatives of the natural compounds, pyrethrins, produced by Chrysanthemum plants to prevent insect attacks.Pyrethrins work by locking sodium channels in the cell membrane. This inhibits nerve impulses and paralyses the insect, ultimately resulting in its death. In the 1940s, synthetic pyrethroid insecticides were first used on auricular crops. But till the 2000s, 100 of insect species were resistant. This occurred due to the fact that the allele for pyrethroid resistance increased throughout the population.Pyrethroid resistance developed to enable the insects to survive. Natural selection allowed an exponential transfer of insecticide resistance genes throughout the insect population.Three major mechanisms of resistance were identified by scientists:Increased expression of genes involved in toxin detoxification.Decrease in sensitivity of the target proteins (on which pyrethrins act).Decrease in the insecticide penetration through the cuticle.Answer:
B) The allele for pyrethroid resistance increased throughout the population.
Explanation:
The allele for pyrethroid resistance increased throughout the population. Variation exists. The allele for resistance remained as those insects not resistant died out. Over time the resistant allele in the populations increased.
Ari drew a diagram to show organisms in an ecosystem. What did Ari draw?
Answer: food web
Explanation:
Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
What is an Ecosystem?An ecosystem may be defined as a type of place or an area where individuals of different species live together and interact with one another for the purpose of food, shelter, and space along with a mating partner.
According to the context of this question, the food web is the diagram that is drawn by Ari in order to express numerous organisms in an ecosystem.
A food web may be characterized as the interconnection of the number of food chains with each other in order to form a web-like pattern. In this type of arrangement, one organism can hold more than one position.
Therefore, Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
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A certain population of bluebirds eats spiders as a major food source. Which of the following ecosystem changes would impact this population of bluebirds the most?
Answer:
Explanation:
Predators
Human activities
Answer:
an increase in the spider and insect populationExplanation:
What are the five categories of adaptations?
Empirical evidence is obtained using our human senses, which statement
best explains the importance of empirical evidence in science
A. This type of evidence is impossible to repeat.
o
B. This type of evidence is personal and unsupported,
o
C. This type of evidence can be checked by others,
o o
D. This type of evidence is provided by authorities,
The statement “This type of evidence can be checked by others” best explains the importance of empirical evidence in science.
Explanation:
There are all kinds of evidence used in science, but empirical evidence is obtained as a result of repeated experiments and observations. This evidence is used to either support or argue against a scientific theory. Empirical evidence is the preferred evidence since this kind of evidence can be peer reviewed, i.e. reviewed by other scientists and/or researchers. In other words, the experiment can be redone, and the evidence can be tested.
Copper exists in nature as two isotopes. The atomic masses and relative abundance of these isotopes is given in the table. What is the average
atomic mass of copper?
Isotope
Cu-63
Cu-65
Relative Abundance(%)
69.17
30.83
Atomic Mass (am)
62.93
64.94
A. 62.93 amu
B. 63 55 amu
C. 63.935 amu
D. 64.94 amu
E. 127.87 amu
The average atomic mass of the copper from the two given copper isotopes is 63.55
Explanation:
The average atomic masses of the isotopes of an element is calculated by the addition of the masses of the two isotopes in proportionality to their percentage of natural occurrence.
Cu-63 relative abundance 69.17 Atomic mass 62.93
Cu-65 relative abundance 30.83 Atomic mass 64.94
Average atomic mass= Cu 63 Atomic mass*relative occurrence percentage+ Cu 65 Atomic mass*relative occurrence percentage
62.93*0.692+64.94*0.308
= 63.546 amu is the average atomic mass of copper.
Cancer is the product of a mutation that
A) causes the uncontrollable growth of cells
B) changes the structure of hemoglobin in the blood
C) brings out stunted growth and severe pain
D) causes a translocation in a pair of chromosomes
Answer: A) causes the uncontrollable growth of cells
Explanation: Cancer can eventually lead to a tumor which has a large mass
Determining risk of possible genetic defects can occur before or after conception and includes all of the following approaches EXCEPT:
Group of answer choices
linkage analysis.
Amniocentesis.
karyotype analysis.
pedigree analysis.
chorionic villi sampling.
Answer:
Linkage analysis
Explanation:
Linkage analysis is the only example here that does not look at possible genetic risks, such as looking for abnormal chromosome structures (karyotype) or family history (pedigree analysis).
Instead, linkage analysis is used to narrow down the chromosomal location of a particular trait. That is, it is a method used to find segments of chromosomes that harbour a particular trait.
how does nitrogen leave a food chain?
A. Primary consumers eat nitrogen-containing green plants.
B. Producers absorb nitrogen-containing nutrients by their roots.
C. Decomposers break down nitrogen-containing waste material from primary consumers.
D. Denitrifying bacteria convert nitrogen-containing nutrients in the soil into atmospheric nitrogen.
Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
. Why are the effects of acidic deposition often felt in ar-
eas far from where the primary pollutants are produced?
Answer:
Acid desposition is very harmful for the environment because it can easily combine with primary pollutants like carbon monoxide, particulate matter, sulfur oxide etc and form harmful substances.
Explanation:
Acid desposition means acid forming pollutants in the atmosphere that can easily combines with the primary pollutants which is emitted from car and energy power plants.One of the major culprit is sulful dioxide which is released from car. Once they react with water, produce sulfuric acid and nitric acid. Their pH is extremely low thus they acts as acid.These acidic desposition create hazards in aquatic body,wetlands,aquatic fishes,shell fishes,may cause nitrogen pollution and also cause damage in ecosystem.This is the main reason that acidic desposition often felt in area far from pollutants so that it does't hamper the ecosystem.10. Cloud droplets form and grow as water vapor condenses onto hygro-
scopic condensation nuclei. Research has shown that the maximum
radius for cloud droplets is about 0.05 millimeter. However, typical
raindrops have volumes thousands of times greater. Explain how cloud
droplets become raindrops.
Answer:
According to collision- coalescence theory, formation of raindrop from cloud droplets occurs when cloud droplets collide and coalesce or stick together.
Explanation:
The only significant difference between a raindrop and a cloud droplet is that a raindrop consist of a velocity that is non-negligible during the fall.Larger droplets having higher terminal velocities fall faster and collide with smaller droplets. Often the cloud droplets stick together and coalesce to form a larger droplet. This starts a chain reaction where these bigger droplets fall even rapidly, collide with the other droplets in their path and merge with these droplets.How do viruses replicate?
Answer:
When a virus get access into an accommodating host body , it infuses its genes into the host's cell and uses this medium to replicate itself in a large number
Explanation:
In nature, a virus can't replicate itself it replicate only with the help of the host cell.
Explanation:
The replication of the virus comprises six steps they are attachment, penetration, uncoating, replication, assembly, and release. Due to the absence of the reproductive organelles, the virus replicates only with the help of the host cell. They use the organelles of the host cell to replicate and injects its genetic material into a cell during attachment and penetration. After uncoating replication occurs. During the replication of the virus in a host cell, it produces a protein called the capsid. The total replicate cycle of a virus along with the host is called the lysogenic cycle.Which of these is an example of land contamination?
O
A. Desertification
* O
B. Garbage dump
O
C. Recycling bin
O
D. Deforestation
Answer:
B
Explanation:
desertification and deforestation are effect of land contamination and other environmental threats.
this is a recycle bin...and it wont harm anyone...It will recycle the grabage and...help our environment.
Garbage dump will contaminate our water ways with hazardous chemicals...and it will release green house gases like methane....and also when enough methane was produced it can even cause explosions...dont foget the bad odour.
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An example of land contamination is garbage dumps. The correct option is B. Garbage pollutes the land, water, and air.
What is contamination?Contamination is the state or presence of unwanted and undesirable things or elements that pollute, infect, or make dirty a place. Contamination can be of anything, and it affects both the place and the health of the people.
Garbage is the unwanted or filthy elements that have to dispose of carefully, but garbage dumping anywhere contaminates the land, water, and air.
Thus, option B. Garbage dump is correct regarding contamination of land.
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Do my eyes have a faint fold?
tissue structure experiment please.
Answer:
Histology is the branch of biology which is related to the study of tissues.
The following are the general steps which are to be taken to examine a tissue under a microscope.
Fixation:Fixation protects the tissue from autolysis. It hardens the tissue due to which it becomes easier in cutting the thin sections of a tissue. Fixation is done with the help of chemicals like aldehydes.
Selection:Selection is done to isolate the particular tissue which we want to observe.
WaxingParaffin waxing is done so that the tissue remains embedded.
Staining:Staining is done so that the tissue can be seen and separated from other tissues.
MicroscopeThe tissue can then be observed under a microscope.
The photograph Depicts a condition called syndactyly. Explain what might have happened during development to result in this condition
Answer:
Cells in between the toes did not undergo apoptosis during the development of the fetus resulting in webbed toes.
Explanation:
Winds in our atmosphere are created as a result of which of the following processes?
A. Energy that is absorbed in the atmosphere
B. Gravitational attraction from the moon
C. Density of the air particles in the atmosphere
D. Uneven heating of the air in the atmosphere
Answer:
The correct option is D) Uneven heating of the air in the atmosphere
Explanation:
Wind can simply be described as air which is moving or which is in motion. The uneven heating of the Earth's surface caused by the sun is the reason why winds occur. The difference in pressure of one area to another area causes the air to move and cause wind. The air tends to move from an area of higher pressure to an area of lower pressure and such is the movement of the wind.
Questions
The decay of uranium isotopes is used to provide what information about Earth's history?
The decay of uranium isotopes is used to provide information about the age of Earth.
Explanation:Isotopes of Uranium U-232, U-233 , U-234 , U-235 , U-236 , U-238 are used as fuel in nuclear reactors or as explosives for nuclear weapons. Uranium 238 is not very radioactive and it constitutes for nearly 99.3% of natural uranium on Earth and has the longest lifetime: its period is 4.5 billion years, about the age of Earth.
Use of radiometric dating techniques help in defining the age of substances (natural or man-made) using the known decay rates of radioactive elements. Each element has an individual decay rate and half life time.
Two Uranium isotopes (U-238 and U-235) are used for radiometric dating. Both the isotopes have different decay rates and half life period. Both are unstable and radioactive. Since two different isotopes produce two different decay clocks (one as a reference to other), it is beneficial in accurately determining the age of samples. The age of earth (rocks or other natural elements) can be easily determined using Uranium isotopes.
Answer:
yes i know its "the age of the earth" but in the question thing it doesnt have that the closest one i put is age of rocks but im not sure
Explanation:
pls help lol
A person who was infected with many common diseases as a child will contain more of which of the following compared to a child who was not exposed to many diseases?
A) Memory cells that provide a specific defense
B) Memory cells that provide a nonspecific defense
C) monocytes that provide a specific defense
D) monocytes that provide a nonspecific defense
Answer:
the answer is C
Explanation:
the answer is C
Answer: monocytes that provide a specific defense
Explanation:
What process releases the least ATP per molecule of glucose for immediate cell use?
Answer:
Anaerobic respiration
Explanation:
Anaerobic respiration occurs releasing the ATP per molecule of glucose for immediate use by the cell. Anaerobic respiration is carried out in absence of oxygen. There are two forms of fermentation, alcoholic and lactic acid fermentation. In humans, lactic acid fermentation occurs in muscle cells during intense muscular activity.
C6H12O6 → 2C3H6O3 + 150 kJ