Answer: Option (b) is the correct answer.
Explanation:
When a teaspoon of salt is dissolved in water then it will completely dissociate into ions forming a homogeneous solution.
This is because particles of salt will evenly distribute into ions in the water.
This is a physical change as salt has dissociated into its ions and it has not chemically combined to the water molecules.
Hence, both salt and water will retain their chemical; properties.
Thus, we can conclude that in the given situation it’s a physical change because the water and the salt kept their original properties.
what affects gravity
consider the car driving around a circular track .Once stated,the driver maintains a speed 0f 45m/h.Compare the driver's velocity with his acceleration in this case.
A.)The car is accelerating because it is changing direction but the velocity is constant.
B.)The car is traveling at a constant rate of speed so it is not accelerating and the velocity does not change
C.)Acceleration is the change in velocity so the car is experiencing a change in velocity and it is accelerating
D.)The car is traveling at a constant rate of speed so it is not accelerating but the velocity changes because the direction the car travels is constantly changing.
Answer:
C
Explanation:
acceleration is the change in velocity so the car is exercising a change in velocity and it is accelerating....
what ions would you expect to find when an acid dissolves in water?
Final answer:
When an acid dissolves in water, it dissociates into hydrogen ions (H+) and anions, with strong acids fully dissociating and weak acids only partially. The H+ ions often form hydronium ions (H3O+) in the solution.
Explanation:
When an acid dissolves in water, you would expect to find hydrogen ions, denoted as H+, and anions specific to the acid. For instance, if hydrochloric acid (HCl) is dissolved, it dissociates into H+ and chloride ions (Cl-). This process is a characteristic feature of acids in an aqueous solution. A strong acid, such as sulfuric acid (H2SO4), will completely dissociate into 2 H+ ions and a sulfate ion (SO42-). These hydrogen ions often associate with water molecules to form hydronium ions (H3O+), making the solution acidic.
Svante Arrhenius defined an acid as a substance that produces H+ ions when dissolved in water, and this concept is key in understanding the behavior of acids in aqueous solutions. Weak acids, in contrast, partially dissociate, producing fewer hydrogen ions and their corresponding anions compared to strong acids.
what 2 energy resources do not rely on photosynthesis
Nuclear energy and geothermal energy are two resources that don't rely on photosynthesis. They're generated through nuclear reactions and Earth's internal heat, respectively, offering efficient and renewable alternatives to traditional energy sources.
Two energy resources not reliant on photosynthesis are nuclear and geothermal energy. Nuclear power harnesses energy from atomic reactions, such as fission or fusion, offering high energy density and continuous supply. It faces challenges in waste management and safety. Geothermal energy utilizes heat from Earth's interior, providing renewable power with low emissions and a small footprint. However, its availability is geographically limited, and extraction may impact local ecosystems. Both are vital in reducing dependency on fossil fuels and mitigating environmental impacts.
Which of the following statements is subjective? Van Gogh painted beautiful works of art. The planets revolve around the sun. Blue is a color. Einstein was a scientist.
Answer: Option (a) is the correct answer.
Explanation:
A subjective statement is defined as the statement which tends to express a belief or judgement about something.
For example, Van Gogh painted beautiful works of art.
In this statement, according to the believer Van Gogh's work of art are beautiful. This means that he believes that Van Gogh's work is good or beautiful.
Whereas the statements planets revolve around the sun, blue is a color, and Einstein was a scientist are all universal truth and not an opinion or belief of someone's.
Thus, we can conclude that the statement Van Gogh painted beautiful works of art is subjective.
what element has 8 protons and 8 nuetrons
Choose an organism that you are familiar with, and explain how the three parts of the cell theory relate to the organism
Answer:
Organism: Chicken
Explanation:
Let's suppose we have a chicken.
Chicken is a multicellular organism, with several parts such as wings, legs among many others.
The first part of cell theory: All organisms are made of one or more cells. Chicken is composed of several cells, cells are a couple in organs, such as hearth, legs and other. Each organ is composed of a specialized type of cell.
The second part of cell theory: The cell is the basic unit of organisms.The cell is the minimum expression of living organisms. Cells can eat, drink, digest and breath. Due to it, cells are the basic unit of organisms. Each cell inside the chicken can achieve own functions by itself.
Third. All cells come from existing cells.If we analyze the chicken origin, we can notice that chicken life began as an egg, a single giant cell. With time going, the single cell of the chicken was reproducing until it reaches the organism and many cells. In this sense, all chicken cells come from a single existing cell of the egg.
Chemicals used for controlling insects and weeds could reduce soil fertility by:
When farmers use chemicals to kill some weed or bugs, those chemicals also were absorbed by the plant and the soil.
That absorption can affect fertility because the chemical can change some chemical and physical traits from the soil and plant.
In worse cases, it can cause erosion, this means, that the soil is "dead" and nothing will grow.
a electron compared to a proton
Elements in the periodic table are arranged in columns or
It is a large body of air that has the same properties as the Earth's surface over which it develops.what is it?
besides hydrogen and oxygen what is required to produce the chemical reaction that yields water
To produce the chemical reaction that yields water, in addition to hydrogen and oxygen, energy is also required. This can come in the form of heat. A common type of chemical reaction resulting in water is dehydration synthesis.
Explanation:Besides hydrogen and oxygen, energy is required to produce the chemical reaction that yields water. For example, this energy can come in the form of heat, as shown by the enthalpy change of the reaction 2H₊ + O → H₂O, which indicates that 286 kJ of heat are released when hydrogen and oxygen gases react to form water.
A known type of reaction involving the production of water is the dehydration synthesis. In this case, one reactant gives up a hydrogen atom and another gives up a hydroxyl group (OH), causing a molecule of water as a byproduct.
Learn more about Chemical Reaction of Water here:https://brainly.com/question/32927016
#SPJ12
if 50% of a radioactive element remains after 4000 years what is its half-life?
Final answer:
The half-life of the radioactive element is 4000 years.
Explanation:
In radioactive decay, the half-life is the time it takes for the activity (or radioactivity) of a substance to decrease by half.
Let's consider an example: If 50% of a radioactive element remains after 4000 years, we can determine its half-life by finding the time it takes for the original quantity to reduce by half (50%). In this case, it took 4000 years for the element to reduce from 100% to 50%. Therefore, the half-life of the element is 4000 years.
what are the advantages of electric cars
How can you use the periodic table to find the number of protons in one atom of an element?
The number of protons is the same as the atomic number of the element.
The number of protons is the same as the atomic weight of the element.
The number of protons can be found by subtracting the number of electrons from the number of neutrons.
The number of protons cannot be determined from the information on the periodic table.
A consequence of "yo-yo dieting is that A. cholesterol levels will increase. B. A person will develop allergies to certain foods. C. The body will actually store more fat around the waist. D. The chances of diabetes will increase?
the correct option is C.
Weight cycling refers to the repeated process of loosing and gaining weight. When weight cycling is caused by dieting it is called yo-yo dieting. Yo-yo dieting has many potential negative effects and one of them is increases in body fat percentage. Other negative consequences include: diabetes, fatty liver, high blood pressure, etc.
one of the tallest dog breeds is the great dane which stands over a meter tall. one of the shortest is the pomeranian which stands about 20 centimeters tall based on what you learned about artificial seletion how were these two breeds developed
When the tallest dog breeds and the shortest dog breeds learned about the artificial selection so the development should be explained below.
What is a selective breeding?It is the process where the human used the animal breeding and the plant breeding so that the phenotypic traits should be developed by selected the animal or plant males.
Also, it se-xually reproduced and contain the offspring together.
In this way it should be explained.
learn more about breed here: https://brainly.com/question/17647648
How many calories are needed to raise the temperature of 1 gram of water by 10 degrees Celsius? Chemistry again (uhhh).
And I thought I was smart lol.
can someone best explain why a washing machine represents an open system
How do solutions of water, elements, and compounds that can crystallize into a mineral form deep underground?
Yes I do know it is not chemistry...
Iodine has 53 protons and 74 neutrons: what is the atomic number? What is the atomic mass?
Iodine has an atomic number of 53 and an atomic mass of 127.
Explanation:Iodine (symbol I) has an atomic number of 53, which is equal to the number of protons in its nucleus. The atomic mass of an element is the sum of the number of protons and neutrons in its nucleus. In this case, the atomic mass of Iodine is calculated by adding the number of protons (53) and neutrons (74), giving an atomic mass of 127.
Learn more about Iodine atomic number and atomic mass here:https://brainly.com/question/35559122
#SPJ6
What steps have power plants taken to reduce the amount of sulfur oxides released into the air?
methane fraction of each type of atom
EXPLAIN. List the steps that show the sun provides the energy for the surface ocean currents.
Radium is:
A. more powerful than uranium
B. less powerful than uranium
C. identical to an alpha particle
D. not a radioactive element
The correct answer is A) more powerful than uranium.
Radium is more powerful than uranium.
Radium is part of our environment. It's part of nature, in small amounts. It is part of the alkaline-earth group and was discovered by Pierre and Marie Curie in 1898. Although is soft it has a lot of radiation. When it is exposed to air, it quickly oxidizes. It corrodes in water because it forms radium hydroxide.
Suppose all of the following objects are traveling at the same velocity. Which object requires the greatest amount of force in order to change its velocity? A. a bicycle B. a motorcycle C. a sports car D. a pick-up truck
What is the formula for rubidium nitride
The formula for rubidium nitride is Rb₃N. Rubidium nitride is an inorganic compound composed of rubidium (Rb) and nitrogen (N) atoms.
It is an ionic compound formed by the reaction between rubidium metal and nitrogen gas. It is a solid compound that exists as a crystal lattice structure. Each rubidium ion (Rb⁺) is surrounded by nitride ions (N₃⁻) in a regular arrangement, forming a three-dimensional network of positive and negative ions held together by electrostatic forces.
Rubidium nitride is highly reactive and sensitive to moisture and air.
Learn more about rubidium, here:
https://brainly.com/question/28838867
#SPJ6
A kernel of popcorn contains a small amount of water and when heated the popcorn pops. How can you explain this to someone
Many mountains on Earth have been formed by the eruption of __________.
A. earthquakes
B. hurricanes
C. volcanoes
Answer:
It is C. Volcanoes
Explanation:
Living cells require constant access to energy in order to remain alive. Which statement BEST describes why cells need a constant supply of energy?
Answer:
D) Energy is required in order to maintain homeostasis--without a constant, organized internal state, the cell will die.
Explanation:
Energy is required in order to maintain homeostasis--without a constant, organized internal state, the cell will die. Cells require energy to keep entropy low and organization high.
Energy is needed to maintain homeostasis because a cell cannot survive without a consistent, well-organized internal environment.
What is homeostasis?Homeostasis is defined as any self-regulating mechanism by which biological systems have a tendency to keep their stability while responding to environmental factors that are best for survival. The homeostasis of the organism maintains optimal levels of enzyme and cell activity. It is the preservation of a constant internal environment despite changes in internal and external environments.
The trait of an organism that was developed for survival is called homeostasis, and it refers to the body's ability to maintain its internal conditions regardless of its surroundings. Similar to mammals, the organism expends between 70 and 90 percent of its energy on maintaining its internal conditions, demonstrating that a significant amount of energy is needed for the organism to maintain homeostasis.
Thus, energy is needed to maintain homeostasis because a cell cannot survive without a consistent, well-organized internal environment.
To learn more about homeostasis, refer to the link below:
https://brainly.com/question/3888340
#SPJ6