Answer: It is A
Explanation: Melting occurs when a solid is heated and turns to liquid. The particles in a solid gain enough energy to overcome the bonding forces holding them firmly in place. This is called freezing and occurs at the same temperature as melting. Hence, the melting point and freezing point of a substance are the same temperature.
Answer:
B. it increase
Explanation:
it increase cause if you put more temperature, the molecules would move more quickly leading to solid become a liquid.
i hope its help
What is the volume of a coffee pot
Answer:
A "12-cup" US coffeemaker makes 57.6 US customary fluid ounces of coffee, which is equal to 6.8 metric cups of coffee.
Explanation:
Which process requires cellular energy to move
molecules across the cell membrane from a regionof lower concentration to a region of higher concentration?
A. active transport
B. diffusion
C. osmosis
D. hydrolysis
Answer:
A
Explanation:i beleive its a because it needs to be active
Active transport is the process that requires cellular energy to move molecules across the cell membrane from a region of lower concentration to a region of higher concentration. It works against the natural flow of substances and requires energy, typically in the form of ATP, to facilitate this movement. Examples include the sodium-potassium pump and the transport of larger molecules.
Explanation:The process that requires cellular energy to move molecules across the cell membrane from a region of lower concentration to a region of higher concentration is known as active transport. Active transport mechanisms require the use of the cell's energy, typically in the form of adenosine triphosphate (ATP), to move substances against the concentration gradient. For instance, proteins within the cell membrane may act as 'pumps', using cellular energy to facilitate the movement of substances. Unlike passive diffusion and osmosis, which rely on the natural movement of substances from an area of higher concentration to a lower concentration, active transport must work against this natural flow, requiring energy.
Examples of active transport include the sodium-potassium pump, where sodium is pumped out of the cells and potassium is pumped into cells, both moving against their concentration gradients. Another example can involve the transport of larger molecules or ions through the cell membrane against their concentration gradient, which also requires ATP.
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Why is information that has been peer edited more reliable than information that has
not?
Peer editors often check a writer's work for accuracy.
Peer editors charge money to publish information.
Peer editors make sure that spelling and grammar is correct.
Peer editors are more intelligent than writers.
Answer:
Peer editors often check a writer's work for accuracy.
Explanation:
A peer-reviewed report or scientific journal means the contents of the scientific journal or report have been scrutinized by other scientists and the results of any experiments/tests have been confirmed and corroborated for accuracy. Peer scientists replicate these experiments to check if they can get the same results indicated. Only then is the document positively reviewed and can be trusted for citations across the scientific community. Its a method of Quality Assurance in the scientific community.
Scientific method lab results
Answer:
1.Observation and description of a phenomenon. The observations are made visually or with the aid of scientific equipment.
2.Formulation of a hypothesis to explain the phenomenon in the form of a causal mechanism or a mathematical relation.
3.Test the hypothesis by analyzing the results of observations or by predicting and observing the existence of new phenomena that follow from the hypothesis. If experiments do not confirm the hypothesis, the hypothesis must be rejected or modified (Go back to Step 2).
4.Establish a theory based on repeated verification of the results.
Explanation:
The scientific method is a structured approach used in scientific research. It begins with an observation, then a hypothesis is formed, and experiments are conducted to test this hypothesis. Lab results reveal whether the hypothesis was correct, needs revision, or is incorrect.
Explanation:The scientific method is a systemic approach used in science to find answers to questions or solve problems. It consists of a sequence of steps, each of which plays an integral part in the research process.
The first step is to make observations about the world around us. With observations, we form a hypothesis, which is a tentative explanation for the observed phenomenon. This hypothesis becomes the basis for the experiment, where we test to see if it holds true.
The lab results are findings obtained from an experiment. They provide detailed information on whether the hypothesis stands or not. They may either support the hypothesis, totally debunk it, or partially prove it. Analyzing and interpreting these results is key in scientific research. For instance, if your hypothesis is 'All plants turn towards the sunlight,' you would study several plant species over a period of time to either support or refute this hypothesis based on the results. If some plant species consistently do not turn towards the sun, your lab results would falsify the hypothesis, leading to its revision.
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What is the role of a scientist?
_______________________
(Apex) Answer Choices:
A. To keep scientific secrets
B. To report accurate results
C. To tell people how they must live
D. To dictate government policies
Answer:
B.
Explanation:
The purpose of being a scientists is to share your discoveries with others. Discoveries which must be accurate.
To report accurate results is the role of a scientist. Thus, the correct option is B.
What is the role of scientist in society?Scientists play an important role not only in avoiding unprofessional and dangerous decisions, but also in advising policymakers and other stakeholders about the wiser and best moves to make towards a human-centered society, in such that fomenting scientific knowledge and expanding cross cultural connections and joint research.
Scientists create hypotheses, test them through various methods such as statistics and data and evaluate conclusions based on the evidence provided.
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A good question to use for a scientific investigation should be testable, and it should be connected to science concepts. Casey wants to do a scientific investigation about light. Which of the following questions would be best to use to guide his scientific investigation?
A) What color of light is the prettiest?
B) Which type of light bulb is easiest to catch?
C) Which type of light bulb burns the longest?
D) Which type of light bulb is preferred by moms?
Answer: C
Explanation:
Study island
Answer:C) Which type of light bulb burns the longest?
Explanation:The prettiness of light bulb cannot be directly measured. The question "Which type of light bulb is preferred by moms?" and the question about catching light bulbs are not related to scientific concepts about light or light bulbs. The best scientific question is, "Which type of light bulb burns the longest?"
When does IPM use synthetic chemical pesticides?
Answer:
only as a last resort
Explanation:
The IPM or Integrated Pest Management only use synthetic chemical pesticides as a last resort. The IPM is a way to deal with the pests. It aims to decrease the population of the pests below normal level to avoid mass destruction of crops by pests and other insects.
Synthetic chemical pesticides are ruthless and efficient in doing their jobs but they also leave some damage behind. Most pesticides that use synthetic chemicals are harmful to the crops as well as for our bodies. Using them in large quantities is not recommended.
Emily wanted to see what battery lasted the longest. She put each battery into a clock and recorded the time that the clock stopped. She used Duracell, Energizer, Kroger bran, and EverReady. What is the control variable and the contstants?
The control variable in Emily's experiment could be any unchanged factor like clock type, while the constants are conditions that remained the same for all batteries tested. The problems provided focus on calculating energy content, battery life, and evaluating a company's product claim in a real-world context.
Explanation:In Emily's experiment, the control variable could be any factors she kept constant, such as the type of clock used, the environment in which the clocks were kept (temperature, humidity, etc.), and the start time for each battery. The constants are all the conditions that were kept the same for each battery tested to ensure a fair comparison, like the brand and model of clock, as well as the conditions under which the experiment took place.
Looking at the supplied problems, they deal with calculating energy content and battery life which are essential concepts in Physics, particularly related to electric circuits and power consumption.
Problem 91 touches upon statistical analysis with a real-world application in evaluating a company's claim about their product. It involves using a calculator to determine the probability of a sample mean being at a certain value or lower, which is an interesting application of statistics in a Physics context.
All atoms of the same element contain the same number of
a. neutrons.
b. protons.
c. neutrons and electrons.
d. neutrons and protons.
Answer: The answer is B while neutrons and electrons are usually the same in a given atom protons are always consistent.
in cellular respiration, _ ATP molecules must be input to initiate the process of glycolysis
Answer:
If the question is how many ATP molecules must be input to initiate the process of glycolysis than the answer would be 2. This would result in the total net gain of 2, because while four ATP molecules are produce it requires two to begin the whole process.
What is a benchmark meaning in earthquakes
Answer:a time period where its at a low
Explanation:its break time
An atom of argon has three electron shells, all of
which are full. Its atomic mass is 40. How many
neutrons does it have?
a. 8
c. 20
e. 24
b. 16
d.22
Argon, with an atomic number of 18 and an atomic mass of 40, contains 22 neutrons. This is calculated by subtracting the number of protons (18) from the atomic mass (40).
Explanation:The atom in question here is Argon. To understand the number of neutrons it contains, we need some basic knowledge of atomic structure and atomic mass. An atom consists of protons, electrons, and neutrons. Argon has an atomic number of 18, which tells us it has 18 protons. Electrons do not contribute significantly to the atomic mass, hence, the atomic mass is basically the sum of protons and neutrons.
Knowing that Argon has an atomic mass of 40 and that it has 18 protons, we can calculate the number of neutrons. Subtract the number of protons from the atomic mass (40-18), yielding the number of neutrons. So, Argon has 22 neutrons.
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Question 2 (b) The membranes of both B cells and the cancer cells are largely composed of phospholipids. Explain how, when the membranes are fused, the polar parts of the phospholipids from one cell will interact with the phospholipids from the other cell and how the nonpolar parts of the phospholipids from one cell will interact with the phospholipids from the other cell.
The major component of cell membranes are lipids. They have two groups attached to them which are called “hydrophobic fatty acid tails” and “hydrophilic head”. B cells are called lymphocytic cells which provide immunity by secreting antibodies. Cancer cells are cells which continuously repeats itself to form a tumor structure.
When the polar parts interact hydrophobic tails are lined up with one and another. They form a membrane which diffuses creating a membrane of hydrophilic head on two sides facing water .Thus a brief explanation of how polar and the nonpolar parts combine are explained.
When cells fuse, hydrophobic phosphate groups of both cells interact with water; whereas hydrophobic fatty acid tails interact with one another in the interior of the bilayer.
The main component of the plasma membrane in all cells are monomers called phospholipids.A phospholipid is a lipid molecule composed of glycerol (the backbone of a phospholipid), two fatty acids, and a polar phosphate group head.The non-polar fatty acid chains are hydrophobic, while the negatively charged phosphate groups are hydrophilic.When forming membranes from monomers, phospholipid molecules of the membrane organize themselves as a bilayer.The polar phosphate groups tend to form hydrogen bonds with water and with other polar molecules on both the exterior and interior of the cell.The fatty acid chains of the phospholipids interact with each other, which help to stabilize the lipid bilayer structure and these interactions are responsible for the membrane's properties.In conclusion, when cells fuse, the polar phosphate groups interact with water on both the exterior and interior of the cell; whereas fatty acid tails interact with one another in the interior of the bilayer.
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Additional education is typically required to enter fields of law.
A.
True
B.
False
Answer:
B. False
Explanation:
Additional information is not typically required to enter the fields of law.
Answer:
TRUE
Explanation:
Although there are many fields of law that do not require additional education, lawyers do. I anwered False and got it wrong so it's TRUE
The blood pressure of a soldier is measured while he is resting. The soldier is then exposed to a stressful environment and his blood pressure is measured again
What’s the independent and dependent variable?
Answer:
Independent: stressful enviromentt
Dependent: blood pressure
Answer:
A variable, which is monitored or changed while performing an experiment in order to examine the influences on the dependent variable is considered as the independent variable. On the other hand, the variable, which is being determined and examined while performing an experiment is known as a dependent variable.
The dependent variable bank upon the independent variable. As the researcher modifies the independent variable, the influence on the dependent variable is witnessed and noted. In the given case, a soldier is exposed to a stressful environment, which makes a change in his blood pressure.
It is noted that with the change in the environmental condition, a change is noticed in the blood pressure of the soldier. Thus, in the given case, the stressful environment is an independent variable, and the change in blood pressure is a dependent variable.
Which elements can form basic compounds? Check all that apply. sulfur rubidium arsenic selenium silicon xenon antimony
Final answer:
Among the elements listed, rubidium can form basic compounds like rubidium hydroxide, while silicon can react with strong bases to form silicates. The other elements mentioned are not typically known for forming basic compounds.
Explanation:
Elements that Can Form Basic Compounds
Among the elements listed, rubidium (Rb) is a metallic element that can form basic compounds known as oxides and hydroxides. For instance, rubidium hydroxide (RbOH) is a strong base. The element silicon (Si), while being a metalloid, can react with strong bases to form silicates, which are basic compounds. However, sulfur (S), arsenic (As), selenium (Se), antimony (Sb), and xenon (Xe) are typically not known for forming basic compounds. Arsenic, for instance, generally forms compounds with oxidation states of 3+ or 5+ and not typically basic in nature.
It is important to differentiate between basic compounds and acidic or amphoteric compounds as it affects the chemical reactions and properties of these elements. For chemistry students, understanding the properties and tendencies of elements to form certain types of compounds is essential in predicting chemical reactions and studying material characteristics.
The answers are:
B) Rubidium
C) Arsenic
E) Silicon
G) Antimony
Homo erectus is believed to be the first confirmed species found outside of ___
Answer:Homo erectus is believed to be the first confirmed species found outside of Africa.
Explanation:
Answer:
Homo erectus is believed to be the first confirmed species found outside Africa.
Explanation:
The human race is believed to have evolved in Africa because the evidences of evolution of major human species are found in Africa. The fossil evidences of Homo erectus were found in Georgia, China etc before millions of years. Evidences of all the human species that lived on earth before Homo erectus were found in the continent of Africa.
All the human species that lived before Homo erectus didn’t stand upright and move in two legs. It was only from the period of Homo erectus that humans stood upright and moved in two legs.
After you decide what information to collect in a descriptive investigation, you need to _____.
Answer:
Make Observations is your answer
Explanation:
Mark brainiest please
Answer:
Make Observations
Explanation:
i hope you have a great day and have a wonderful weekend
Put the steps of Cellular Respiration in order.
1 1. In the Citric Acid/Kreb's Cycle the carbons that are left from the initial glucose are oxidized releasing more
CO2. NADH and FADH2 and 2 ATP molecules are produced.
12. Glycolysis takes place in the cytoplasm and breaks down glucose to form two molecules of pyruvate. 2 ATP
are produced and NADH is saved for later.
13. Two molecules of pyruvate move into the mitochondria where they are converted into Acetyl CoA. More
NADH is produced and CO2 is released.
4. In the electron transport chain, the NADH and FADH2 give up electrons, energy is released and captured as it
moves from a high concentration to a low concentration.
15. Energy is used to produce about 34 ATP. Oxygen is the terminal electron acceptor that combines with oxygen
to produce water
Answer:
The steps will be in order in the sequence 12,13,11,4 and 15
Explanation:
12. In glycolysis, glucose is converted into pyruvate. ATP and NADH ARE MADE.
13. Pyruvate is oxidized and converted into acetyl CoA in the mitochondria. Carbon dioxide and NADH are also made.
11. The acetyl CoA undergoes a series of changes and ATP, FADH2, NADH, and carbon dioxide are released.
4. NADH and FADH2 lose their electrons and get converted back into NAD+ and FAD.
15. Oxygen takes electrons and water is produced. 34 ATP molecules are released.
Answer:
In a global sense, Cellular respiration takes place with the following process: Glycolysis, Pyruvate oxidation, Citric acid cycle (Kreb's cycle) and finally the oxidative phosphorylation. This corresponds to 12, 13, 11, 14, and 15.
Explanation:
In a global sense, Cellular respiration takes place with the following process: Glycolysis, Pyruvate oxidation, Citric acid cycle (Kreb's cycle) and finally the oxidative phosphorylation. Now, we will organize the presented steps in order to achieve Cellular respiration as follows:
First step: 12. Glycolysis takes place in the cytoplasm and breaks down glucose to form two molecules of pyruvate. 2 ATP are produced and NADH is saved for later.
Second step: 13. Two molecules of pyruvate move into the mitochondria where they are converted into Acetyl CoA. More NADH is produced and CO2 is released.
Third step: 1 1. In the Citric Acid/Kreb's Cycle the carbons that are left from the initial glucose are oxidized releasing more CO2. NADH and FADH2 and 2 ATP molecules are produced.
Fourth step: 14. In the electron transport chain, the NADH and FADH2 give up electrons, energy is released and captured as it moves from a high concentration to a low concentration.
Finally, 15. Energy is used to produce about 34 ATP. Oxygen is the terminal electron acceptor that combines with oxygen to produce water
We can conclude that Cellular respiration takes place with the following process: Glycolysis, Pyruvate oxidation, Citric acid cycle (Kreb's cycle) and finally the oxidative phosphorylation. This corresponds to 12, 13, 11, 14, and 15.
the cell membrane is a lipid bilayer, but a cell has only one cell membrane. which organelles in this lesson have a double membrane?
Answer:
The cell membrane is composed of two layers of phospholipids and is a fluid structure that's composed of four main molecules.DNA is transcribed into RNA within the nucleus and then RNA is transported to the cytoplasm.The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells. These membranes are flat sheets that form a continuous barrier around all cells.
Explanation:
The mitochondria and chloroplasts in plant cells, as well as the nucleus, are the organelles in a cell that possess a double membrane.
Explanation:The cell organelles that have a double membrane are the mitochondria and the chloroplasts in plant cells. These organelles are unique in that they have their own DNA separate from the rest of the cell, and this is protected within their double membrane structure. The nucleus, which houses the cell's main DNA, also has a double membrane. Hence, several organelles do indeed have a double membrane despite the cell itself having a single cell membrane, which is also known as a lipid bilayer.
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WILL GIVE 20 POINTS AND BRAINLIEST
In which direction does the tail of the molecule of the plasma membrane face?
away from water
toward the outside
toward the middle
toward the head of another molecule
Answer: C.) toward the middle
Explanation: The molecules are organized so that the "tails" of the two layers are in the middle.
The direction that the tails of plasma membrane usually face is toward the middle.
The plasma membrane can be regarded as membrane that serve as boundaries between the cell and environment. They can as well be referred to as cell membrane, they regulate transport of materials both inside and outside the cell, It has a lipid bilayer In the formation of cellular membranes, There is assemblage of the phospholipids into two parts, base on their properties.These are,:hydrophilic head
two hydrophobic tails
These properties are essential to plasma membrane because once phospholipids comes across water. the phospholipids will just rearrange itself so that the hydrophobic tails will be at the middle, facing each other , then the hydrophilic heads will face out.Because of the hydrophobic properties of the tail they always try to avoid water and that is why they face each other towards the middle.Therefore, option C is correct because the tails is hydrophobic in nature
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Prompt
What are scientific models used for? Give an example of each of the following types of models: Idea, Physical, Computer.
Answer:
Scientific models are used to predict and elaborate the behaviour of the real objects in the field of physics, chemistry, ecology and earth science.
It is used to gain improved understanding of the processes and systems.
Explanation:
However, every model have some limitations because they are not the representative of every possible scenario. For instance, relationship between time and distance is the idea model, study of cell and its various parts uses physical model, predicting earthquake uses computer model.
what biological macromolecule is made up of monomers
Answer:
Carbohydrates, proteins and fats are the biological molecule that are made up of monomeric units.
Explanation:
Polysaccharides are the starches that are comprised of at least two monosaccharides. For instance, starch is made up of many glucose units. Proteins have amino acids as their monomer units.
There are twenty different amino acids that combines at different proportion to form different proteins. Fats are the lipids that have fatty acid and glycerol as their monomeric units.
A person lives in a new structure that complies with modern building codes with regard to earthquake safety. What is the best place for this person to take cover during an earthquake
Answer:
The correct answer would be to move under a table.
Explanation:
The best manner by which a person can remain safe at the time of an earthquake as suggested by the experts is to drop, cover, and hold on. Thus, the best thing one can do at the time of an earthquake is to drop and cover under a table and hold on.
The deadly things, which can turn fatal at the time of an earthquake would be to stand in a doorway or near a window or covering in a basement.
Enzymes are able to increase the speed of a reaction because they accomplish which of these tasks
Answer: Activation Energy
Explanation:Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Answer:
They decrease the activation energy.
Explanation:
where would your find tension
Answer:To calculate the tension when a pulley is lifting 2 loads vertically, multiply gravity time 2, then multiply it by both masses. Divide that by the combined mass of both objects. When you're done, remember to write your answer in Newtons
Explanation:this is because to calu
Tension is the force along the length of a flexible connector, such as a string, rope, chain, or cable. It is a pull that acts parallel to the connector and in opposite directions at the two ends of the connector. In physics, tension is often used to describe the force exerted by a flexible connector when a perpendicular force is applied.
Explanation:Tension is the force along the length of a flexible connector, such as a string, rope, chain, or cable. It is a pull that acts parallel to the connector and in opposite directions at the two ends of the connector. In physics, tension is often used to describe the force exerted by a flexible connector when a perpendicular force is applied.
For example, consider a person holding a mass on a rope. The tension in the rope is the force exerted by the rope to support the weight of the mass. The tension would be larger if the rope is more horizontal and would be equal on both ends if the angles on either side are the same.
Another example is the tension in wires suspending an object, like a traffic light. When analyzing the tension in each wire, we can neglect the masses of the wires. The tension in each wire can be found by considering the equilibrium of forces acting on the object.
How do enzymes affect activation energy?
Answer:
Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.
Explanation:
Enzymes affect activation energy by significantly lowering it. This reduction in activation energy increases the rate at which chemical reactions occur within cells. As a result, reactions that might occur too slowly or not at all because of high activation energies proceed rapidly in the presence of enzymes, facilitating the complex network of metabolic pathways necessary for life.
Activation energy is the minimum amount of energy required for reactants to transform into products in a chemical reaction. In biochemical processes, this energy barrier can prevent vital reactions from happening at efficient rates. Enzymes serve as biological catalysts that lower this barrier, making it easier for the reaction to occur without the need for excessive heat which is unattainable in living cells. These catalysts work by binding to reactant molecules, stabilizing the transition state, and thereby decreasing the necessary energy for the reaction. For instance, in cellular respiration, glucose is a key reactant transformed into energy. The production of glucose is through photosynthesis, which is an endothermic reaction because it requires energy input from sunlight. Proper nutrition and regular exercise are crucial for maintaining a healthy body as they ensure the availability of necessary substrates and optimized enzyme function for metabolic reactions.
Which temperature is colder, -187°C or -168°C?
In the comparison of temperatures, -187°C is colder than -168°C, as numerically lower temperatures on the Celsius scale represent colder conditions.
The question at hand is which temperature is colder, -187°C or -168°C. In terms of temperature measurement, a lower number indicates a colder temperature. Thus, directly comparing the numbers, -187°C is colder than -168°C because the value -187 is smaller (or lower) than -168 on the Celsius scale. Furthermore, the subject of temperature ties into the concept of the Kelvin scale, which is an absolute thermodynamic temperature scale with its zero point at absolute zero, the theoretical coldest possible temperature.
. Why do you think Latin is used instead of a more modern
language?
Answer:
Explanation:
No sarcasm is intended here, but which language would you pick?
English, French, Spanish, Italian, Greek or Russian, just to name a few. Latin is the root of many languages and most educated people understand enough of it to be able to identify what you are talking about.
a chemistry student’s height is measured at 68.5 inches. How tall is the student in cm
Answer:
173.99 CM
Explanation:
68.5 * 2.54 = 173.99
If a chemistry student’s height is measured at 68.5 inches, then he would have been 174 centimeters tall.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
As given in the problem a chemistry student’s height is measured at 68.5 inches and we have to find out his height in centimeters.
As we know, from the standard measurements,
1 inch = 2.54 centimeters
68.5 inches = 68.5 ×2.54 centimeters
= 174 centimeters
Thus, he would have been 174 centimeters tall.
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