Textbooks that have a greater gravitational pull are 4kg textbooks and the distance of objects that have a greater gravitational pull is 2cm.
Newton's law of gravity is Newton's conclusion that the gravitational attraction acting between two objects is proportional to the mass of each object and inversely proportional to the square of the distance between the two objects. So, a 4kg textbook will have a greater gravitational pull than a 2kg textbook.
The strength of the earth's gravitational force on objects is affected by the distance of the object from the center of the earth. The farther an object is from the center of the earth, the smaller its gravitational force.
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An ad claims that a supplement helps a person lose weight, helps curb appetite to snack less, raises levels of serotonin to make a person feel less hungry, blocks new fat from forming, and increases metabolism to have more energy and burn existing fat. The manufacturer of the supplement published the data from the study of the product.
The study of the supplement used 100 subjects between the ages of 20 and 65. Of the 100 participants, 50 were male and 50 were female. Once the participants were selected for the study, each had the visceral fat measured. After all 100 participants were measured, it was determined that each had a measurement of more than 90 centimeters.
The testing subjects were divided into two groups. One group of 50 received the supplement and one group of 50 received a placebo. The study lasted for 16 weeks, but after 12 weeks, both groups were given the placebo.
After 16 weeks, men in both groups had a slight decrease in body weight. At the end of the study, the group receiving the supplement had reduced visceral fat when compared to the placebo.
After reading this data summary, what do you think? Answer the following questions in a post. Each question is worth 2 points.
1.Based on the testing data of the supplement, were any of the product's claims, proven correct? If so, identify the claims.
2.What data led you to that conclusion?
3.Which of the product's claims, if any, were not proven to be correct?
4.What type of testing data would you need to see in support of those claims to believe they were true?
5.When you see a product advertised on social media, how can you determine whether it is making reliable claims?
Answer:
If FDA finds that the evidence supporting the proposed claim is credible and the claim can be qualified to prevent it from misleading consumers,
fda.gov
Explanation:
In the diagrams above, explain what type of competition is in each and support your answer.
Answer:
1st one is competition (when two organisms fight for limited resources)
2nd one is predation (pursuit, catching food)
Explanation:
hope this helps
How do you find the moles of H2O?.
To determine mole of Water or H₂O, you can do as follow:
Determine the atom of Water. As we know that is two hydrogen atoms and one oxygen atom.Each mole of the water molecule has 0.2 g. this calculated by adding the masses of a number of atoms elaborate in the formation of the water molecule Mass of water = ( 2 × 1 . 008 ) + 16 = 2032Determine total mr of water from periodic table and we will found the value is 18 g/molDetermine the mole by the formula: n = mass :total Mr. then we will find out that n = ( 2032)x : 18 where x is total water molecule.What are molecules?Molecule is a chemistry essence that contain two or more atom combines. The characteristic of molecule could be acid, base or neutral. Water is a molecule that has pH in neutral or pH = 7.
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explain why the composition of an element is fixed
A fixed composition exists when an element contains only one type of atom.
What is fixed composition?A chemical substance's composition is fixed. "All samples of a compound have the same composition; i.e., all samples have the same proportion, by mass, of the elements present in the compound," Proust concluded.Pure Substance Matter with a defined composition and properties. Every pure substance is either an element or a compound. Elements All atoms are the same type, and elements only have one type of atom. For example, oxygen (O2), gold (Au), silicon (Si), and diamond (C).A pure substance is one that has a consistent chemical composition throughout, such as water, air, or nitrogen. A pure substance does not have to be composed of only one element or compound.To learn more about fixed composition refer to :
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How many molecules of carbon dioxide (CO2) will be produced when 36.60 g of benzene (C6H6) reacts completely with excess oxygen (O2)?
1.69× 10²⁴molecules of carbon dioxide will be produced when 36.60 g of benzene reacts completely with excess oxygen .
What is moles?Mole, often known as mol, is a commonly used unit of measurement in chemistry for vast amounts of tiny objects including molecules, atoms, or other specific particles. In addition, the General Conference for Weights and Measures defines a mole as a unit of both the International Units System.
2C[tex]_6[/tex]H[tex]_6[/tex] + 15O[tex]_2[/tex] [tex]\rightarrow[/tex] 12CO[tex]_2[/tex] + 6H[tex]_2[/tex]O
moles of benzene = 36.60 g/78.11
=0.468 moles
the mole ratio between benzene and carbon dioxide is 2: 12
moles of carbon dioxide =6×0.468 moles
=2.80 moles
number of molecules of carbon dioxide =2.80 moles ×6.022×10²³molecules
=1.69× 10²⁴molecules
Therefore, 1.69× 10²⁴molecules of carbon dioxide will be produced when 36.60 g of benzene reacts completely with excess oxygen .
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What is the kinetic energy of a body of 2 kg moving with a velocity of 2 m s?.
The kinetic energy of the body is 4J
The body's kinetic energy is made up of
The energy of motion, or kinetic energy, can be seen in the movement of an item or subatomic particle. Kinetic energy is present in every moving object and particle. Kinetic energy is present when something moves, such as a person walking, a baseball soaring through the air, a piece of food dropping from a table, or a charged particle in an electric field.
According to the information provided, the body has a mass of 2 kg and a velocity of 2 m/s.
Kinetic energy is [tex]\frac{1}{2} mv^2[/tex]
where m is the mass of the body and v is velocity of the body.
k.E = [tex]\frac{1}{2} 2(2)^2[/tex]
K.E = 4 J
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An atom of the ame element X ha an atomic number 8 and ma number 16,17,18. What i reponible for the difference in their ma number
The atomic weight of oxygen would be 16 if every known oxygen atom had 8 protons and 8 neutrons.
However, we are aware that some types of oxygen contain fewer than 8 neutrons in their nucleus, which accounts for the slightly below-16 atomic weight of some kinds of oxygen.
As a result, oxygen atoms have eight protons. Oxygen atoms typically have 8 neutrons as well. Oxygen atoms with 8 neutrons would have a mass of roughly 16 amu since their mass number is 16 (8 p+ + 8 n0).
Isotopes are atoms with the same number of protons but differing numbers of neutrons. Various atoms of an element may have different masses because the amount of neutrons for a particular element might change.
As an illustration, certain helium atoms have three neutrons as opposed to two.
Take the atomic number (Z) of 8 for oxygen. As a result, oxygen atoms have eight protons. Oxygen atoms typically have 8 neutrons as well. Oxygen atoms with 8 neutrons would have a mass of roughly 16 amu since their mass number is 16 (8 p+ + 8 n0).
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to make 150 ml of a 0.50 m solution of sucrose, you will need how many grams of sucrose?
To make the 150 ml of the 0.50 M solution of sucrose, we need grams of sucrose is 25.6 g.
Given that :
The volume of the sucrose = 150 mL
The molarity of the solution = 0.50 M
The molarity expression is given as :
The molarity = moles / volume in L
Moles = molarity × volume
= 0.50 × 0.150
= 0.075 mol
The molar mass of sucrose = 342.2 g/mol
The mass of sucrose = moles × molar mass
The mass of sucrose = 0.075 × 342.2
= 25.6 g
Thus, the mass of sucrose is 25.6 g.
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Which of the following chemical equation represents a decomposition reaction? answer choices. H2SO3 → H2O + SO2. 2K + 2H2O → 2KOH + H2
The first equation, H2SO3 → H2O + SO2 is an equation that represents a decomposition reaction whereas the second equation, 2K + 2H2O → 2KOH + H2 is a single displacement reaction.
A decomposition reaction is defined as a chemical reaction wherein one reactant among the reactants, breaks down into two or more products.
The general format/formula of a decomposition reaction is:
AB -> A + B
where, AB is the parent molecule i.e. the reactant and A & B are the product molecules of the equation.
A decomposition reaction can be both endothermic (heat absorbing) or exothermic (heat releasing) in nature. However, the latter is more common in nature than the former.
One of the major applications of decomposition reaction is in the extraction of metals from their respective ores. For example, zinc(Zn) can be obtained/extracted from calamine (ZnCO3) by subjecting it to a decomposition reaction. In a manner similar to this, sodium can be obtained from it's ore sodium chloride (NaCl).
Some common existing examples of a decomposition reaction are provided below:
The decomposition of carbonic acid (H2CO3) in soft drinks, which can be equated as H2CO3 → H2O + CO2The reaction in the electrolysis of water to yield hydrogen and oxygen.Learn more about decomposition reaction here:
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what is the common name for sodium hydrogen carbonate ?
Answer: The common name for sodium hydrogen carbonate is baking soda.
I hope this helps!
Explanation: It is a chemical compound with a formula called NaHCO3. It consists of sodium cation or Na+ and a bicarbonate anion HCO3-
If 165 J of energy raises the temperature of 20 g of an unknown metal from 30 to 50 degrees Celsius, what is the metal's specific heat?
0.103
0.413
66,000
4,950,000
AT=(Tr-T))
c = Specific Heat
AE= Heat Energy / Heat Gain or Loss
AE=mcAT
0.4125 joules per gram per degree Celsius is the metal's specific heat.
What does specific heat mean?
The amount of heat needed to increase the temperature of one gram of a substance by one degree Celsius is known as specific heat. Typically, the units of specific heat are calories or joules per gram per Celsius degree. As an illustration, the specific heat of water is 1 calorie (4.186 joules) per gram per degree Celsius.
The heat that a system releases or absorbs per unit mass during an irreversible isobaric-isothermal phase shift is known as latent heat.
c = Specific Heat
AE= Heat Energy / Heat Gain or Loss
AE=mcAT
165 = 20 *c * (50-30)
c = 165/ (20*20)
c = 0.4125
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How many water molecule (H2O) can be produced from 6 molecule of hydrogen ga (white) reacting with 6 molecule of oxygen ga (red)? Which reactant i the limiting reactant? 6 molecule of oxygen and 6 molecule of hydrogen A. 6 water molecule, hydrogen i limiting B. 3 water molecule, oxygen i limiting C. 3 water molecule, hydrogen i limiting D. 12 water molecule, oxygen i limiting
The limiting reagent is hydrogen gas, and 6 molecules of water are generated.
We receive:
Six molecules make up a hydrogen gas molecule. 6 molecules make up an oxygen gas molecule.
The following is the chemical formula for the reaction between hydrogen gas and oxygen gas:
2H2 + O2 → 2H2O
Using the reaction's stoichiometry:
One oxygen molecule reacts with two molecules of hydrogen gas.
As a result, 6 molecules of hydrogen gas and 1/2 × 6 = 3 molecules of oxygen gas will react.
Since the amount of oxygen gas provided exceeds what is necessary. It is therefore regarded as an excess reagent.
As a result, hydrogen gas is regarded as a limiting reagent since it restricts product formation.
Using the reaction's stoichiometry:
2 molecules of water are created from 2 molecules of hydrogen gas. Thus, 6 molecules of hydrogen gas will result in 2/2 × 6 molecules of water.
As a result, 6 molecules of water are created, with hydrogen gas acting as the limiting reagent.
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express the answer in scientific notation
(7.296 x 10^2) Divided by (3.6 x 10^-9)
7.296 x 102 in scientific notation 23x1011 is obtained by dividing by 3.6 x 109.
What do the symbols used in science mean?Very big or very low numbers can be written using scientific notation. Once a number within 1 and 10 has been multiplied by such a power of 10, it is then expressed in scientific notation. For instance, the scientific notation for 650,000,000 is 6.5 108.
What does notation serve as?A system of symbols and signs is used in notation to represent words, numbers, sentences, etc. The efficient communication of words, figures, and other objects is greatly aided by notation, which is frequently created for a specific purpose. Music notation is a prime example of notation.
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How do you solve kinetic energy problems?.
To solve kinetic energy problems follow the following steps. There are 5 simple steps.
Potential and kinetic energy are the two fundamental types of energy. The energy that an object holds in relation to another object's position is known as potential energy. You have more potential energy, for instance, if you are at the top of a hill than if you are at the bottom.The energy an object has when in motion is referred to as kinetic energy. Kinetic energy can result from rotation, translation, or vibration (movement from one place to another). The mass and velocity of an object can be used in an equation to quickly calculate its kinetic energy.
To calculate kinetic energy the steps are :-
1. Understand the problem/ kinetic energy
2. Calculate the mass of the object
3. calculate the velocity of the object
4. substitute in the kinetic energy formula
K.E = 0.5 x mv2
5. Simply the equation and find the value.
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classify each statement based on whether it describes prokaryotes only, eukaryotes only, or can describe both prokaryotes and eukaryotes.Prokaryotes Eukaryotes Both Answer Bank unicellular contain mitochondria are generally less than 2 pm multicellularlack membrane-bound organelles
The following is the solution to the given question:
What are prokaryotes?
An organism lacks a distinct nucleus and other organelles due to the lack of an internal membrane. Bacteria are one of the best-known prokaryotes.
What are Eukaryotes?
Eukaryotes refer to unicellular or multicellular organisms whose cells contain distinct membrane-bound nuclei. Examples: plants and animals, fungi, and protists.
Prokaryotes: are generally less than 2um, lack membrane-bound organelles
Eukaryotes: multicellular, contain mitochondria
Both: Unicellular
Prokaryotes are single-celled organisms, but there are also single-celled eukaryotes such as yeast, and protists.
Eukaryotes have membrane-bound organelles like mitochondria, whereas prokaryotes lack membrane-bound organelles and prokaryotic cells are smaller than eukaryotic cells.
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What statement best describes the transfer of energy in the photo?
B. when water changes state from a solid to a liquid, thermal energy is absorbed.
What is transfer of energy?The process of moving energy from one system to another, such as through the transmission of heat, work, or mass, is known as energy transfer.
It should be noted that the transformation of energy into another form or the transfer of energy from one location to another.
The mode of energy transfer are:
RadiationConduction, and Convection of Heat EnergyIn summary, thermal, radiant, chemical, nuclear, electrical, motional, acoustic, elastic, and gravitational energy are some of the different types of energy.
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the maximum buffering effect of a weak acid occurs at.....?
When the ratio of weak acid and its salt in a buffer is equal to 1, it is said that the buffering capacity is maximum.
A buffer is made up of either a weak acid and its salt or a weak base and its salt.
The amount of acid or base that can be added to a given volume of a buffer solution before the pH changes significantly, usually by one unit, is referred to as the buffering capacity. Buffer capacity is determined by the amounts of weak acid and conjugate base present in a buffer mixture.
When NaOH is added to solutions containing varying concentrations of an acetic acid/sodium acetate buffer, the observed change in buffer pH is inversely proportional to the buffer concentration. If the buffer capacity is increased by tenfold, the buffer solution can absorb ten times the amount of strong acid or base previously.
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what is the difference between organic and inorganic chemistry ?
The primary difference between organic chemistry and inorganic chemistry is that organic compounds mandatorily have a carbon atom, while most of the inorganic compounds do not contain a carbon atom.
Inorganic chemistry is mostly concerned with the properties and behavior of the inorganic compounds, which include minerals, metals and organometallic compounds.
Inorganic chemists are employed in fields ranging from mining to microchip making. The works are based on understanding the following:
The behavior and analogues for the said inorganic elements, and How these materials can be separated, modified and used.On the other hand, Organic chemistry is the study of the properties, structure, composition, preparation and reactions of carbon-containing compounds. Most organic compounds contain carbon and hydrogen together, but they may also include any number of other elements too (e.g., nitrogen, oxygen, halogens, phosphorus, silicon, sulfur).
Organic chemists spend most of their time developing noval/new compounds and finding better sustainable ways of synthesizing existing ones.
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Does molar mass determine density?.
Answer:
Since gases all occupy the same volume on a per mole basis, the density of a particular gas is dependent on its molar mass. A gas with a small molar mass will have a lower density than a gas with a large molar mass
water molecules are composed of an oxygen atom and 2 hydrogen atoms. which atom is the more electronegative atom?
Answer: Oxygen is more electronegative than the two hydrogen atoms. I hope this helps!
Explanation:
This is due to their electrons in their covalent bonds, they are closer to the oxygen atom then the two hydrogen atoms.
For a gas-phase reaction where the temperature and the
pressure remain constant, any mole ratio is equal to a volume
ratio.
a)TRUE
b)FALSE
It is true that For a gas-phase reaction where the temperature and the pressure remain constant, any mole ratio is equal to a volume ratio.
What is gas-phase reaction?The simplest chemical processes are ones that take place in the gas phase and are completed in a single step, as the transfer of a chlorine atom from ClNO2 to NO to produce NO2 and ClNO. NO + ClNO2(g) (g). In the gas phase, an atom or molecule can undergo the process of becoming an ion by adding or removing charged particles like electrons or other ions. Gas phase ion chemistry heavily relies on these reactions.Only in the case of ideal gases and no change in the number of gas-phase moles during the reaction is the equilibrium composition pressure independent. Increasing the pressure at constant temperature reduces the equilibrium conversion when the reaction involves more gas-phase moles.
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Luis5385
04/28/2018
Chemistry
High School
answered • expert verified
The tendency for a replacement reaction to occur increases as the _____. interval between any two elements in the activity series decreases temperature decreases valence electrons are used up interval between any two elements in the activity series increases
Option (d) is correct. The tendency for a replacement reaction to occur increases as the interval between any two elements in the activity series increases.
A replacement reaction is said to be a reaction occurs when elements switch places in compounds. This reaction involves ions. In this type of reaction more reactive elements replace less reactive elements. A replacement reaction occurs when one element replaces another element in one compound. here, less reactive elements replaced by more reactive elements. so, larger the interval between the elements in the activity series the greater the tendency for the replacement reaction to occur.
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The complete question is,
The tendency for a replacement reaction to occur increases as the _____.
(a) interval between any two elements in the activity series decreases ( b) temperature decreases
(c) valence electrons are used up
(d) interval between any two elements in the activity series increases
how would having too much sample in the melting point tube most likely affect a melting point measurement?
Having too much sample in the melting point tube most likely results in a lower melting point measurement.
The melting point as well as liquefaction point of a substance is the temperature at which it changes its state from solid to the liquid. At melting point the solid as well as liquid phase will exists in an equilibrium. The melting point of a will depends on pressure and it is usually specified at a standard pressure such as 100 kPa or 1 atmosphere.
The melting point will be lower than expected. This is because having more sample will causes the heat to spread out more slowly throughout the tube, which can raises the temperature at the point of the measurement as well as causes the sample to melt before to it reaches its actual melting point.
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c) Calculate the frequency of light required to remove the valence electron(s).
The frequency of light required to remove the valence electron(s) from an atom is known as the ionization energy. The ionization energy is dependent on the atomic structure and is specific to each element.
What is calculation of frequency of light?This energy can be calculated using the equation: E = hf = hc/λ, where E is the ionization energy, h is Planck's constant, f is the frequency of the light, c is the speed of light, and λ is the wavelength of the light.E = hf = hc/λwhere E is the ionization energy, h is Planck's constant, f is the frequency of the light, c is the speed of light, and λ is the wavelength of the light.To calculate the frequency of light required to remove the valence electron(s) from an atom, the ionization energy of the atom must be known, and then the equation can be rearranged to solve for frequency:f = E/h = hc/λEIt is important to note that the ionization energy for each element is unique and can be found in periodic table or in the reference book.To learn more about frequency of electron refer:
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Pleaseee help now ASAP please
Diphosphorus trichloride has a phosphorus content of 22.554%. Phosphorus is indeed a mineral that can be found in many foods naturally as well as in supplements. It has a number of functions in the body. It is a crucial component of cell membranes, bones, and teeth.
What occurs if you have a high phosphorus level?Frequently, high phosphorus does not result in any symptoms. On the other hand, an excess of phosphorous in your blood can result in calcium loss from your bones and other body tissues, resulting in low calcium levels (also called hypocalcemia). Low calcium levels do result in symptoms like: tense muscles
Does phosphorous hurt people?Severe vomiting & diarrhea, both of which are characterized as "burning," "luminescent," and with a garlic-like odor, are frequently brought on by ingestion of basic white or yellow phosphorus. Dysrhythmias, comas, hypotension, and even death are potential additional symptoms of severe poisoning.
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How energy saving is done in cloud computing?.
Cloud computing is an efficient way to save energy, by utilizing virtualized resources and reducing or eliminating the need for physical hardware.
By utilizing virtualized resources, companies can reduce the amount of energy needed to power physical hardware such as servers. This also reduces the need for cooling systems, as the machines are running in a virtual environment.
Additionally, cloud computing allows for more efficient resource allocation, meaning that more users can be supported with fewer resources, which in turn reduces the energy used.
Finally, cloud computing also enables automated operations, which can reduce the human energy used to manage complex IT tasks.
By implementing these energy-saving measures, cloud computing can help businesses save on energy costs and help reduce their environmental impact.
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Which one of the following is the largest mass?
A) 7.6 x 10^4 mg
B) 7.6 × 10^7 ng
C) 7.6 x 10^-² kg
D) 7.6 × 10^8 μg
Answer: its d
Explanation:
sorry if you get it wrong
Oxides of active metals, such as CaO, react with water to produce...A) Metal CarbonatesB) Metal HydridesC) Metal HydroxidesD) Acids
The correct answer is Metal Hydroxides
What are metal hydroxides?
Metal hydroxides are metal hydroxides.They are often strong foundations. They consist of hydroxide anions and metal cations. Some metal hydroxides, such as alkali metal hydroxides, completely ionize when dissolved. Some metal hydroxides are weak electrolytes and only partially dissolve in aqueous solution.They are often strong foundations. They consist of hydroxide anions and metal cations. Some metal hydroxides, such as alkali metal hydroxides, completely ionize when dissolved. Some metal hydroxides are weak electrolytes and only partially dissolve in aqueous solution.To know more about metal hydroxides, click the link given below:
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how can a small contained fire be extinguished most easily?
If the fire is contained in a beaker or a small vessel, it can often be extinguished by covering the vessel with a wire gauze or addition of sand or dry ice. If the fire is in a larger vessel or has spread, dry ice is very effective.
What is meant by vessel?
A ship or a sizable boat is a vessel. a tube that the body's blood travels through to circulate. A network of arteries, arterioles, capillaries, venules, and veins make up the blood vessels.Your body's blood travels through blood arteries, which act as conduits. They create a circuit-like closed loop that starts and finishes at your heart.Your circulatory system is made up of blood vessels and heart vessels. About 60,000 miles of blood arteries make up your body.The main type of water-conducting cell in flowering plants is called a vessel cell. Vessel cells are modified tracheids in which the end walls have lost their primary membranes, allowing for direct, unhindered connections for water transport between the cells.To learn more about vessel refer to
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Answer the following question by entering the numeric value with appropriate units. when entering units, capitalization is important. for example, m is the symbol for meter and m is the symbol for molarity. if the length of one side of a square is 12.0 m , what is the perimeter of the square?Express the perimeter with the appropriate units.
The perimeter of the square is 48 meter if the length of the side is 12 meter.
A square can be defined as a two-dimensional closed shape with 4 equal sides and 4 vertices. The opposite sides of the square are parallel to each other. Square is also a rectangle with equal length and breadth. The perimeter of the square is a two-dimensional shape. The perimeter the length of one side must be multiplied by 4 as squares have 4 sides. so, 12 is multiplied by 4 and the result will be 48 meters. so, the parameter of the square will be 48 meters. A square is a quadrilateral with four equal sides. There are so many objects that are in the shape of a square. The square shape is identified by its equal sides and the interior angles are equal to 90°.
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