Answers
Cartilaginous fishes have cartilage-based skeletons, whereas bony fishes have bone-based skeletons.
What is a Cartilaginous fish?Chondrichthyes is a class of cartilaginous fishes, which have skeletons made primarily of cartilage. They are distinguished from the Osteichthyes, or bony fishes.
Sharks, skates, rays, and chimeras are all members of the Chondrichthyes class. They are jawed vertebrates with cartilage skeletons rather than bone skeletons.
Summary. The cartilaginous fish are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and cartilage skeletons rather than bone skeletons.
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Related Questions
Convert enzyme concentrations of 2.5%, 5.0%, and 10% to ppt units.
Answers
Answer:
2.5 x 10¹⁰ ppt
5.0 x 10¹⁰ ppt
1.0 x 10¹¹ ppt
Explanation:
The notation ppt refers to parts per trillion units, that is, how many parts of enzyme are there in 1 trillion parts. Percentage refers to the number of parts per 100 units. Converting the given values from percentage to ppt:
\(\frac{2.5}{100}=\frac{a}{1,000,000,000,000}\\a=2.5 *10^{10}\ ppt\\\\\frac{5.0}{100}=\frac{b}{1,000,000,000,000}\\b=5.0 *10^{10}\ ppt\\\\\frac{10}{100}=\frac{c}{1,000,000,000,000}\\c=1*10^{11}\ ppt\)
The concentration in ppt are:
2.5 x 10¹⁰ ppt
5.0 x 10¹⁰ ppt
1.0 x 10¹¹ ppt
1 Percent [%] = 10 000 000 000 Parts per trillion [ppt]
1) Converting 2.5% to ppt1% = 10 000 000 000 ppt
2.5% = ?
Cross multiply
2.5% x 10 000 000 000 ppt / 1 %
= 25, 000 000 000 ppt
2) Converting 5% to ppt1% = 10 000 000 000 ppt
5% = ?
Cross multiply
5% x 10 000 000 000 ppt / 1 %
= 50, 000 000 000 ppt
3) Converting 10% to ppt1% = 10 000 000 000 ppt
10% = ?
Cross multiply
10% x 10 000 000 000 ppt / 1 %
= 100, 000 000 000 ppt
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I need help with dis question please
The question dat says most plants
Answers
Answer:
Explanation:
mitosis
May you please be able to help me on this
Answers
1.- For the superfemale with the pure bread normal male (in this case pure means he is homozygote, or -SS-).
In the first cross, there is no chance for superstrength inheritance, as the male double presence of dominant alleles dominates the expressión. Therefore, normal strength, 100%.
2.- For the heterozygote superhero (that is -Ss-, which means he has normal strength) with the super strong female, we have:
In this case the result is quite different. All the difference lies in the males genotype. Now he carries a recessive allele, which could combine with the female's recessive alleles. So, in this case, there is a chance that the offspring inherit two recessive alleles, which means superstrenght inheritance. Thus, in the second example, 50% of the offspring could have superstrenght, while 50% could have normal strength, it is a 50-50 proportion.
Are lizards reptiles or amphibians?
Answers
Answer:
Reptiles are turtles, snakes, lizards, alligators and crocodiles. Unlike amphibians, reptiles breathe only through their lungs and have dry, scaly skin that prevents them from drying out
What are the components of blood
Answers
Explanation:
Blood is a specialized body fluid. It has four main components:
plasma, red blood cells, white blood cells, and platelets.Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues.
What is the difference between instinct and behavior in an animal
Answers
The difference between instinct and behavior in animals is based on the fact that distinct is an innate response to certain environmental situations while behavior may be acquired in response to external stimuli.
What is the difference between instinct and behavior?The difference between instinct and behavior is that instinctive behaviors are innate which means animals are born with these acquired responses, while behavior depends on the context.
Therefore, with this data, we can see that the difference between instinct and behavior is how these types of responses were acquired by the animal.
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four factors you will consider when planning nutritionally adequate meals for a 3-year-old child
Answers
Accommodate strong dietary preferences. Don't be afraid to explore new meals; just encourage it. At every meal, provide a variety of wholesome foods. Foods can be nourishing.
What does the phrase "nutritionally complete" mean?Foods that are nutritionally complete supply your body with all the carbohydrates, lipids, proteins, vitamins, and minerals it needs to remain healthy. They are helpful for time-constrained persons who wish to eat healthily but don't always have the opportunity to prepare meals ahead of time or have breakfast before leaving the house.
Does "nutritional" imply "healthy"?These different definitions may appear to be similar, but they are not the same. Simply said, a healthy food is one that keeps you healthy and helps you live a longer life. A food is considered nutritious if it provides you with the necessary amount of nutrients for survival.
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This chart gives data on greenhouse gas emissions in the United States from 1990 to 2013. Which questions would help clarify the evidence in the chart? Graph of U.S. Greenhouse Gas Emissions by Gas, 1990-2013. Horizontal line, 1990-2013. Bottom to above, gases shaded are Fluorinated, Other greenhouse, Methane, Carbon Dioxide in million metric tons of carbon dioxide equivalents ranging from 0-8,000.
Answers
The questions that would help clarify the evidence in the chart are:
A. What percentage of total greenhouse gas emissions is caused by natural sources?
C. Why are carbon dioxide emissions so much higher than other greenhouse gases?
What are greenhouse gases?A greenhouse gas is a particular kind of gas that both absorbs and emits radiant radiation, which causes the atmosphere to warm.
Methane, nitrous oxide, carbon dioxide, and other manmade compounds are among the main greenhouse gases.
Carbon dioxide is cited as the most significant greenhouse gas since it now contributes the most to the warming caused by human activity,
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Complete question:
This chart gives data on greenhouse gas emissions in the United States from 1990 to 2013. Which questions would help clarify the evidence in the chart? Select ALL the correct answers.
1. What percentage of total greenhouse gas emissions is caused by natural source?
2. Should industries emitting carbon dioxide in huge amounts be fined or punished?
3. Why are carbon dioxide emissions so much higher than other greenhouse gases?
4. Why did the quantity of carbon dioxide emissions stay constant throughout the period?
5. What is the chemical formula for methane?
Migration is _______. a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location c. the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations Please select the best answer from the choices provided A B C D
Answers
Answer:
d. the seasonal movement of organisms between locations
Explanation:
correct on edge
Answer:
It is 100% D
Explanation:
some bacteria can exchange genetic material with each other using a thin tube that conect them true or false
Answers
The statement some bacteria are capable of exchanging genetic material with each other using a thin tube that connects them is true.
The correct option is True.
What is a conjugation in bacteria?Bacterial conjugation is the exchange of genetic material from one bacterial cell to another through direct contact or a bridge-like link. Through a pilus, this occurs. In bacteria, there is a parasexual method of reproduction.
The connection tube is called a conjugation tube.
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Many male birds will expend a great deal of energy building nests. Females will mate with the males who build the best nests. This is best described as an example of ____.
a. natural selection
b. sexual selection
c. runaway selection
d. an invasive species
e. disruptive selection
Answers
Answer:
The correct answer is option B. sexual selection.
Explanation:
Sexual selection is a special type of natural selection proposed by Charles Darwin. According to this type of natural selection in which a particular sex organism chooses the opposite sex member of the species to mate with on the basis of the preferable traits and compete with the other members of the opposite sex.
Here female birds choose those male birds who build the best nests, it is an example of natural selection.
List three ways to keep the environment clean
Answers
Reduce: Use plastic less
Reuse: Reuse plastic bags and paper bags when going to the store
Recycle: Recycle food, garbage, and paper into different containers
NEED HELP NOW!!!!!!! WILL GIVE BRAINLEIST!!!!!!
In this project, you will make a graphic to help you understand who the producers and consumers are. You can make your graphic in any way that makes sense to you; a bulleted list, a pyramid, a Venn diagram, etc. Your graphic should be clear and easy to understand. You can create it in a Word document, Power Point Presentation, Publisher, or any other graphics program that you are familiar with. Do additional research if you need to find out about any words on the list.
Click here to make a printout of a pyramid.
From the following list, Separate out the producers. Make sure you have clearly labeled this group.
acorns
deer
mice
apple
trees
eagles
owls
cabbage
frogs
potatoes
carrots
grains
rabbits
chickens
grass
squirrels
corn
horses
wolves
cows
lettuce
worms
Next, separate out the plant eating consumers. These are the ones that eat only producers. Make sure to label this group clearly. Last, separate out the predators, making sure to label this group clearly in your presentation. After completing the lab, respond to the following questions:
Were there more producers than consumers and more consumers than predators on your pyramid? Why or why not? Were there any that could have fit in more than one category?
A mouse eats 100 times his own weight in grain in a lifetime. You can see that plants must produce a great amount of food for just one mouse. What do you think would happen if grain was no longer available for the mouse to eat? How would it affect other organisms in your ecosystem?
Answers
Answer:
Producers:
Acorns (produced by oak trees)Apples (produced by apple trees)Cabbage (a leafy green vegetable cultivated as an annual plant)Potatoes (tubers produced by the potato plant)Carrots (root vegetables, usually orange in color)Grains (wheat (produced by wheat plants), barley (produced by barley plant), etc.)Grass (produces seeds and is a primary food source for many herbivores)Corn (a cereal plant that yields large grains, or kernels, set in rows on a cob)Lettuce (a leafy green plant grown for its often-crunchy leaves)Trees (producing oxygen as a byproduct of photosynthesis and also yielding food items like fruit and nuts)Plant-eating Consumers (Herbivores):
Deer (eat various plants and fruits, they are herbivores)Rabbits (eat grass, roots, and leafy greens; they are herbivores)Horses (eat grass and grains; they are herbivores)Cows (eat grass and grains; they are herbivores)Squirrels (primarily eat acorns, grains, seeds, and fruits)Mice (eats mainly plants, seeds, grains, fruits, and vegetables)Chickens (often fed grains, vegetables, and fruits)Predators (Carnivores):
Eagles (predatory birds that feed on smaller animals; they are carnivores)Owls (nocturnal birds that prey on small mammals, birds, and insects; they are carnivores)Wolves (carnivorous mammals that prey on deer, rabbits, and other smaller animals; they are carnivores)Frogs (amphibians with a carnivorous diet, eating insects, small mammals, small fish, spiders, and worms)Detritivores (although not mentioned in the question, they are crucial in every ecosystem):
Worms (in general, worms are classified as detritivores).To answer your questions:
In this bulleted list, there are more producers than consumers and more consumers than predators. This is typical of most ecological pyramids because each level depends on the one below it for food. There are always fewer organisms at the top of the pyramid because energy is lost at each level due to the laws of thermodynamics.For example, squirrels can be considered both plant-eating consumers (as they eat acorns, tree bark, and fruits) and potential predators (as they can be omnivorous, eating small insects and bird eggs). Similarly, mice can be categorized as plant-eating consumers, but they can also be omnivorous, consuming insects and occasionally the remains of deceased animals.If grain was no longer available, the mouse population would be significantly affected. Mice rely heavily on grains for their energy and nutrition. If this food source were suddenly unavailable, the mice would either need to find another food source, like fruits or vegetables, or their population would likely decrease due to starvation. This change would also impact other levels of the ecosystem. Predators who rely on mice as a food source, like owls and snakes, would find fewer prey available, which could lead to a decrease in their populations as well. Conversely, without mice consuming as much grain, the grain population might increase. However, other herbivores who also eat grains might proliferate, taking advantage of the increased food source and maintaining a balance. This hypothetical situation demonstrates the delicate balance of ecosystems and the potential cascading effects that can occur from changes at any level of the food web.In the diagram below, what part of the excretory system is labeled B?
A-
A. Kidney
OB. Ureter
OC. Urethra
OD. Bladder
B.
D
Answers
Option(B) Ureter is the correct option.
The ureter is a vital part of the urinary system in humans. It is a muscular tube that connects the kidneys to the urinary bladder. Each human has two ureters, one attached to each kidney, and they play a crucial role in the transportation of urine from the kidneys to the bladder.
The primary function of the ureter is to carry urine that is produced in the kidneys to the urinary bladder for storage before it is eliminated from the body through urination. The ureters accomplish this by using peristalsis, a wave-like muscular contraction, to propel urine along their length.
The ureters have a complex anatomical course. They originate from the renal pelvis, which is the funnel-shaped structure that collects urine from the kidneys. From there, they extend downward, crossing over the brim of the pelvis and passing behind the peritoneum, the membrane lining the abdominal cavity.
The efficient functioning of the ureters is essential for the proper elimination of waste products and maintenance of fluid balance in the body. Any obstruction or abnormality in the ureters can lead to conditions like kidney stones, urinary tract infections, or urinary reflux.
In summary, the ureters are muscular tubes that transport urine from the kidneys to the urinary bladder. They rely on peristaltic contractions to propel urine, and their structure and positioning help ensure unidirectional flow.
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In the respiratory system certain structures allow air to pass from the trachea to the lungs. They are lined with thin
muscles and coated with epithelial cells.These structures are called
O bronchial tubes.
O alveoli.
O bronchioles.
O lobules.
Answers
Answer:
bronchioles are the structure
Jake has become very anxious ever since he started taking harder classes in his major.
The university's counselor diagnosed him with an anxiety disorder. Compare and contrast how the behavioral, humanistic, and cognitive approaches would view the origins and treatment of Jake's anxiety. Then, describe how psychologists view each of
the three approaches today."
Answers
The behavioral, humanistic, and cognitive approaches provide different perspectives on the origins and treatment of Jake's anxiety.
The behavioral approach would view Jake's anxiety as a learned response that has been reinforced over time. They might suggest that Jake's anxiety is a result of negative experiences or associations with his academic performance, leading to increased anxiety symptoms. Treatment would focus on identifying and modifying maladaptive behaviors through techniques such as exposure therapy and behavior modification.
The humanistic approach would emphasize Jake's self-actualization and personal growth. They might view his anxiety as a result of a discrepancy between his self-concept and the challenges he is facing in his major.
Treatment would involve providing a supportive and empathetic environment where Jake can explore his feelings and values, with the goal of helping him align his personal goals with his academic pursuits.
The cognitive approach would focus on Jake's thoughts and beliefs about his academic performance. They would suggest that his anxiety stems from negative and distorted thinking patterns, such as excessive self-criticism or catastrophic thinking.
Treatment would involve cognitive restructuring, helping Jake identify and challenge irrational thoughts, and developing more adaptive and realistic thinking patterns.
In contemporary psychology, these approaches are not seen as mutually exclusive, but rather complementary. Psychologists recognize that a multidimensional approach, integrating elements from different perspectives, can provide a more comprehensive understanding of psychological issues.
Treatment approaches often combine techniques from various approaches to address the unique needs of each individual, emphasizing a holistic and personalized approach to mental health.
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Which two sentences describe what scientists have discovered about red algae and sponges ?
Answers
The two sentences that describe what scientists have discovered about red algae and sponges are:
B. Biomarker evidence of sponges has been found in rocks that date back to the great oxidation event, while evidence of red algae appeared long after the event.
D. The earliest fossil evidence of multicellular life is of red algae, while the earliest fossils of sponges, also multicellular, appeared much later.
Scientists have discovered biomarker evidence of sponges in rocks that date back to the great oxidation event, while the earliest fossil evidence of multicellular life is red algae.
Hence options B and D are correct.
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In arthropods, What are the tubes that enhance respiration called?
Answers
Answer:
tracheae
Explanation: mark me brainliest!!
Most insects have a respiratory system akin to ventilation in a building. Tubes called tracheae run throughout their bodies delivering oxygen.
what makes you believe that the vegetation has been grown by farmers and has not grown naturally by itself over time
Answers
Organized patterns, irrigation systems, specific crop varieties, and agricultural practices indicate human intervention in vegetation growth, suggesting farming activity.
Determining whether vegetation has been grown by farmers or has grown naturally over time can be assessed by considering various factors. Firstly, the presence of organized patterns or rows of crops suggests intentional cultivation by farmers. The use of irrigation systems, terraces, or other agricultural infrastructure further supports human intervention. Additionally, the selection of specific crop varieties or the presence of non-native plant species may indicate deliberate cultivation. Observation of crop rotation, weeding, and fertilization practices can also provide evidence of human involvement. Historical records or local knowledge of agricultural practices in the area can provide further context. Conversely, natural vegetation tends to exhibit a more random distribution and includes a diverse range of native plant species. Considering these factors collectively can help differentiate between vegetation that has been grown by farmers and vegetation that has naturally grown over time.For more such questions on Vegetation:
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How did the crickets lose their ability to chirp?
Answers
Answer:
By a mutation that altered the shape of their wings, making them incapable of producing the chirping noise. The feat was achieved over less than 20 generations, a mere evolutionary blink of an eye, and, with the crickets living just a few weeks, a very rapid process.
Explanation:
Answer:
The change seems to have been caused by a mutation that altered the shape of their wings.
Explanation:
Makes them incapable of producing the chirping noise. The feat was achieved over less than 20 generations, a mere evolutionary blink of an eye, and, with the crickets living just a few weeks, a very rapid process.
Which structure in the illustration contains the cell’s genetic information?
A.
B.
C.
D.
Answer: B
Answers
Answer:
B.)
Explanation:
The answer would be B.) because it is the nucleus and also you said it yourself.
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how an increase heartbeat can help us to overcome the fear?
Answers
hope this helps
Answer:
An increased heartbeat can help us overcome fear by providing us with heightened alertness, increased oxygen supply to the brain, enhanced physical performance, emotional regulation, and improved focus and attention. These physiological changes can assist in facing fear-inducing situations with clarity, calmness, and readiness. However, overcoming fear often requires a combination of strategies tailored to individual needs.
Explanation:
An increase in heartbeat can potentially help us overcome fear in certain situations by triggering the body's natural stress response, known as the "fight-or-flight" response. When faced with a fear-inducing situation, the body releases adrenaline and other stress hormones, which lead to physiological changes, including an increased heart rate.
Here's how an increased heartbeat can assist in overcoming fear:
Increased Oxygen Supply: When the heart beats faster, it pumps more blood to the muscles and organs. This increased blood flow delivers more oxygen to the brain, enhancing cognitive function and alertness. This heightened state of awareness can enable us to think more clearly and make rational decisions, helping us overcome fear-driven reactions.
Enhanced Physical Performance: The increased heart rate and blood flow also provide a surge of energy to the muscles, preparing the body for action. This physical readiness can be beneficial when facing fear-inducing situations that require quick responses or physical exertion.
Emotional Regulation: Fear can sometimes be accompanied by feelings of anxiety and panic. However, an increased heart rate can trigger the release of endorphins and other feel-good neurotransmitters, promoting a sense of calm and well-being. This emotional regulation can help counteract the negative emotional aspects of fear and enable us to face challenges with a more positive mindset.
Heightened Focus: The physiological changes associated with an increased heart rate can enhance focus and attention. When the body is in a heightened state, the brain prioritizes the immediate task at hand, filtering out distractions. This heightened focus can help us concentrate on the steps needed to overcome the fear or tackle the situation causing the fear.
It's important to note that while an increased heart rate can provide some benefits in overcoming fear, it is not a comprehensive solution. Each individual and situation is unique, and fear responses can vary. Overcoming fear often requires a combination of physiological, cognitive, and behavioral strategies, such as deep breathing, positive self-talk, gradual exposure to fears, and seeking support from others. It's advisable to develop personalized coping mechanisms to address fear and anxiety effectively.
A large object orbiting a star
Answers
Answer:
It is called planet
do hollow bones provide extra weight?
Answers
Answer:
How much lighter would a human be if we had hollow bones like in birds? about 10% lighter. most of our weight is muscle (water) and fat. bones are only about 20% of our body weight.
Explanation:
so no they are actually much lighter
Answer:
The large bones in our body are also hollow, which makes them strong so they can support more weight, but light, so it takes less energy to move them.
Hope my answer helped! Happy Holidays!
Explanation:
in what other parts of a plant might transpiration occur?
Answers
Answer:
Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers
Transcription of the developmental gene M is influenced by two different proteins: B and H. Studies of single and double mutants generated the following information:
In mutants lacking B, transcription of M does occur
In mutants lacking H, transcription of M does not occur.
In double mutants lacking B and H, transcription of M does occur.
Based on this information, put these genes in order in a developmental pathway. Use arrows and t-bars between the genes as appropriate. Choose the correct identity of each below.
Gene 1 1st Symbol Gene 2 2nd Symbol Outcome
Answers
Answer:
B --I H >> M transcribed
Explanation:
Reverse genetics is a classical approach used in molecular genetics to elucidate gene function in a signaling gene network. This technique consists of producing loss of function mutations in genes of interest in order to analyze their phenotypic effects in the downstream signaling pathway.
In this case, the mutation in B didn't affect the expression of the developmental gene M, together with the other mutant lines, this experiment indicates that B is a downstream suppressor of H (since further experiments show that B plays a role in the signaling pathway). Moreover, the mutation in the gene H affects the expression of M, thereby showing that H acts as a downstream activator of M. Finally, B-H double mutants did neither affect the expression of M, thereby showing that M transcription is dependent of the interaction between B and H.
Knowing that proteins B and H interact with each other, and they influence the expression of the M gene, we can propose the following developmental pathway B gene --| H gene >> M gene
------------------------------
Gene pathways refer to the regulation of genes expression by turning them on and off. Many genes and proteins might be involved in this process, each of them playing significant roles in the signaling pathway.
Available data:
The transcription of gene M depends on proteins H and BIf protein B is lacking, gene M is transcriptedIf protein H is lackin, gene M is not transcriptedIf B and H are lackin, gene M is transcriptedAccording to this information, we can assume that,
The mutation in protein B did not influence the transcription of the gene M because even when B is lacking, the gene is transcripted anyway.
However, we can see that H affected M transcription. The mutation in the H protein influenced the gene transcription.
Mutations in proteins H and B did not influence the transcription of the M gene because, in the absence of both proteins, the gene was expressed.
Probably proteins B and H interact with each other, and this interaction influences the M gene transcription.
The developmental pathway is then as follows,
B gene --| H gene >> M gene
------------------------------------
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some mice have inherited a genetic mutation that causes them to have a band of white fur around the middle of their bodies. what is most likely true about an ancestor of these mice?
Answers
If some mice have inherited a genetic mutation that causes them to have a band of white fur around the middle of their bodies, it is most likely that an ancestor of these mice also had the same genetic mutation that caused the band of white fur.
Genetic mutations are changes in DNA sequence that can be inherited by offspring from their parents. If a mutation passed down from the parent to its offspring, then next generations will also have the same mutations. The white fur band presence suggests that the mutation for this trait has been inherited through multiple generations of mice.
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Are gender traits completely a result of societal expectations? #no need of internet answer #
Answers
Answer:
No. Gender traits in humans are largely determined by biophysical processes
Explanation:
Answer:
no
Explanation:
. Gender traits in humans are largely determined by biophysical processes.
Given the equation
time = distance ÷ speed,
how much time will it take for an
airplane to travel a distance of 900
kilometers at a speed of 300
kilometers/hour?
A. 3 hours
B. 1 hour
C. 2 hours
Answers
It will take an airplane 3 hours to fly 900 kilometers at a speed of 300 kilometres an hour.
What is the straightforward meaning of distance?An object's entire velocity, independent of velocity, is its distance. Independent of where someone started or ended, km is the extent of land that only an object is spanned. Without using a time unit, the distance can be calculated using the expression v2 = 2ad, where pro is the inverse of the speed and an is the impulse of the skin.
What does the word "distance" mean?Distance is how length is calculated. For instance, a road's length is equal to its length. The metric system uses the following units of measurement:
Briefing:
time = distance ÷ speed,
distance ⇒ 900
speed ⇒ 300
time⇒ 900÷300
time⇒3 hours
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A scientist has a two-pronged thermometer that can be
connected to two liquids. In an experiment, the scientist
connects the thermometer to a liquid that is known to be
52. After waiting for the liquids to stabilize, the
thermometer reads 68. What is true about the original
temperature of the second liquid?
corded
O The temperature of the second liquid was originally
above 68'.
O The temperature of the second liquid was originally
exactly 68.
O The temperature of the second liquid was originally
between 52 and 68.
O The temperature of the second liquid was originally
below 52.
Answers
Answer:
c
Explanation: