Option (c) reverberation is the best choice. Reverberation can be decreased by utilizing materials that absorb sound before it reaches the room's walls and ceiling, preventing the sound from being reflected.
What is reverberation?Reverberation is the characteristic of sound that best explains what just happened in this scenario. Reverberation occurs when sound waves are reflected off of surfaces in a room, creating multiple echoes that can be heard. When a loud noise is made in a large room, the sound waves will reflect off of the walls, floor, and ceiling, creating a series of echoes that can be heard. This is known as reverberation.
Which is better, reverberation or echo?Both open and closed places can produce echoes. In tight environments with many reflecting items, reverberation occurs. The distance of the item can be determined using the echos. Reverberation cannot estimate the distance of a reflecting object because the travel time is too brief.
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an electromagnetic wave has a frequency of 12 mhz. what is its wavelength in vacuum?
The wavelength of an electromagnetic wave in a vacuum is equal to the speed of light (c) divided by the frequency (f): 2.5 x 10^2 m
What is electromagnetic wave?An electromagnetic wave is a type of energy wave that consists of oscillating electric and magnetic fields. These waves are generated by the vibration of electric charges and travel at the speed of light. Electromagnetic waves can be used to transmit information over long distances, such as in radio and television transmissions. They can also be used to transfer energy, such as in microwave ovens and solar cells. Electromagnetic waves come in many different forms, such as visible light, X-rays, and gamma rays.
λ = c/f
λ = 3.0 x 10^8 m/s / 12 x 10^6 Hz
λ = 2.5 x 10^2 m
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what do you think happens to the average speed as molecular weight increases (assuming the temperature stays the same)?
Generally, as molecular weight increases, the average speed of molecules will decrease. This is because heavier molecules, due to their greater mass, require more energy to move around and so they move more slowly than lighter molecules.
What is the molecules ?
Molecules are the smallest units of matter which have the properties of a particular substance. They are made up of two or more atoms held together by chemical bonds. Molecules can exist in different shapes and sizes, depending on the number and types of atoms they are composed of. They are essential building blocks of all matter, from the smallest to the largest. Molecules can be naturally occurring or created synthetically in a laboratory. Examples of molecules include water molecules, carbon dioxide molecules, proteins, and carbohydrates.
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all the planets revolve around the sun in a(n) direction a. clockwise b. counterclockwise c. northerly d. southerly e. all the above
In the solar system the planets are revolving about the sun and rotation about their axes in a counterclockwise direction and revolving from west to east. Hence option 'b' is correct.
Rotation? What do you mean?The circular movement of an object about its center is referred to as rotation. Things can rotate in a variety of ways. the Earth's rotation. When a round, three-dimensional object rotates around in an invisible line inside of its center, it is a relatively common type of rotation.
What do the Earth's rotation and revolution mean?The term "rotation" describes how an object spins around its own axis. When an object is in revolution, it is moving in an orbit around another object. For instance, the 24-hour day is created as the Earth moves on its own axis. The 365-day year results from the Earth's rotation around the Sun.
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A rocket following a parabolic path through the air suddenly explodes into many pieces. What can you say about the motion of this system of pieces?
Both before and after the explosion, the rocket's centre of mass will continue to move along its original parabolic trajectory. Regardless of whether the rocket's trajectory was parabolic or not.
A location established in relation to an object or set of objects is the centre of mass. It represents the system's average location as weighted by each component's mass. The center of mass for straightforward stiff objects with homogeneous density is found at the centroid.
The center of mass of the pieces will continue to move along the same parabolic direction that the rocket would have taken if it hadn't detonated, just as it did immediately before it did.
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a 37 g plastic ball is moving to the left at 14 m/s . how much work must be done on the ball to cause it to move to the right at 14 m/s ?
A 37 g plastic ball is travelling to the left at 14 m/s, hence 3.6j of effort must be done on the ball to make it move to the right. The definition of work done includes both the application of force.
Concerning the body and its movement. Consider a block placed on a horizontal, frictionless surface. A fixed force F exerts its influence on this block. This force acts to move the body through a distance d in a straight line and in the force's direction.
Work done to stop the ball is equal to 1/2m(v1^2 - v2^2) = 1/2(0.037)(0 - 14^2) = -3.6j.
Work performed to accelerate the ball equals 1/2m(v1^2 - v2^2) = 1/2(0.037)(14^2 - 0) = 3.6j.
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this year 500 pounds of plutonium 239 (nuclear waste) was dumped in the nevada desert. the half-life of pu-239 is 24,360 years. how long will it take until there is only 1 pound left?
Time to take until there is only 1 pound left is half life,t = 218,407 years.
The amount of time needed for the reactant concentration to drop to half its initial value is known as the half-life of a reaction. A constant that is connected to the reaction's rate constant is the half-life of a first-order reaction. First-order reactions include those in radioactive decay. The reduction in radioactive nuclei per unit of time is the rate of decay, or activity, of a sample of a radioactive substance.
Since y' = ky, we can infer that
y = C[tex]e^{kt}[/tex]
Since 500 pounds are initially present
C = 500
Because the half life is 24,360 years, y equals 250 when t equals 24,360. Connecting provides
250 = 500C[tex]e^{24,360k}[/tex]
1/2 = [tex]e^{24,360k}[/tex]
ln(0.5) = 24,360k
k=[tex]\frac{ln(0.5)}{24,360\\}[/tex]=[tex]-2.95 \times 10^{-5}[/tex]
y = C[tex]500e^{2.95\times 10^{-5t} }[/tex]
1 = C[tex]500e^{2.95\times 10^{-5t} }[/tex]
t = 218,407 years.
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A 5.0 kilogram block accerlerating at 6.p meters per second along a rough horizontal force,f, of 50. newtons. What js the magnitude in newtons if the force of friction
is there a chest brace i can use because what can i use because it is to heavy to hold my cannon camera
There are several types of chest braces that can be used to support a heavy camera. The include a camera harness, camera chest mount and stabilizing rig
One option is a camera harness, which distributes the weight of the camera across the shoulders and upper chest. Another option is a camera chest mount, which attaches the camera directly to the chest using straps. A third option is a stabilizing rig, which attaches to the camera and uses counterweights to balance the camera and reduce the strain on the user's arms. It is important to use the chest brace that best fits your needs and also consult with a professional if you have any doubts.
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a 2.0 kg block is forced against a horizontal spring of negligible mass, compressing the spring by 15 cm. when the block is released from the compressed spring, it moves 60 cm across a horizontal tabletop before coming to rest. the force constant of the spring is 200 n/m. calculate the coefficient of sliding friction between the block and the table
The block and table have a sliding friction coefficient of 0.083.
What leads to conflict?Although friction is assumed to be created by the interaction between the microscopic bumps on surfaces when they brush against each other, scientists are not entirely sure what causes it. It is challenging for the surface to slide over one another because the spikes on each surface flex and exert stress on one another.
What can lessen abrasion?The friction between both the edges can be decreased by using lubricants like oil or grease. Friction can be decreased by cleaning the surface, which makes it smooth.
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a bulldozer pushes a boulder with a force of 18,000 n over a distance of 53 m, in a time of 60 s. how much work is done by the bulldozer?
The bulldozer's work done is measured in joules is 954000J, since it is capable of moving a boulder 53 metres with 18,000 newtons of force in just 60 seconds. Force and motion must coexist.
Applied to the body as well as to how the body moves. Consider a block that has been placed on a flat, frictionless surface. This block is affected by a constant force F. The body is moved by this force across a distance of d in a straight line and in the force's direction. In physics, a force is an effect that has the ability to change how an object moves. Due to a force, a massed object may change.
Work done = Force*cos(theta)*d = Force*d = 18,000*53 = 954000J
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hie can u help me solve this please
Write the following. as powers of 10, with one figure before the decimal point 0,000275
Answer:
Explanation:
2'75·10∧-4
a gas, while expanding under isobaric conditions, does 480 j of work. the pressure of the gas is , and its initial volume is . what is the final volume of the gas? (4.5 x 10-3 m3)
The final volume of the gas is 4.5 x 10-3 m3.
What is final volume?Final volume is the measure of the volume of a substance or object after all changes to it have taken place. It is the measure of the amount of space taken up by an object or substance at a specific point in time.
We can use the work-energy theorem to solve this problem. Work (W) is equal to the change in energy (E). Since the expansion is isobaric, the change in internal energy is zero. Therefore, W = E = PΔV, where P is the pressure and ΔV is the change in volume.
We know that W = 480 J and P = ?. To solve for ΔV, we can rearrange the equation to ΔV = W/P. Plugging in the given values, we have ΔV = 480 J / P.
We also know the initial volume (V1) of the gas, so we can calculate the final volume (V2) by adding the change in volume to the initial volume: V2 = V1 + ΔV. Plugging in the given values, we have V2 = 4.5 x 10-3 m3 + (480 J / P).
Therefore, the final volume of the gas is 4.5 x 10-3 m3.
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Infrared spectroscopy is a useful tool for scientists who want to investigate the structure of certain molecules. Which of the following best explains what can occur as the result of a molecule absorbing a photon of infrared radiation?
Energies of infrared photons are the same as the energies of chemical bonds. Molecules absorb infrared photons of characteristic wavelengths, revealing the types & strengths of different bonds in the molecules.
What is the purpose of infrared?There are several uses for infrared technology. Heat sensors, thermal imaging, and night vision gear are some of the most well-known types. Infrared light is employed in wired and wireless activities in communications and networking.
Animals can perceive infrared, but how?The human eye cannot sense infrared light because it has different range and less energy than visible light. However, several snake and scorpion species, bed bugs, vampire bats, and mosquito species can see by using parts of the infrared spectrum. Infrared energy can occasionally be "seen" by people as heat.
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The acceleration due to gravity on the surface of Earth is g. Calling R the radius of Earth, at what distance from Earth's center would the acceleration due to gravity drop to g/16
At a distance of four times the radius of the earth the gravity drops to g/16.
Acceleration due to gravity means the acceleration obtained by an object due to the gravitational force. Value is found out to be 9.8m/s²
The equation for acceleration due to gravity, g = GM/R²
G is the Gravitational constant
M is the mass of earth
R is the radius of the earth.
When the acceleration due to gravity is g/16,
g/16 = GM/r², r is the distance from the earth.
Substituting the value of g,
GM/R²/16 = GM/r²
Cancelling GM on both sides
1/R² = 16/ r²
r² = 16× R²
r = √(16×R²)
= 4R
So the acceleration due to gravity falls to g/16 when the distance from the earth is four times its radius.
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t what speed does a 2000 kg compact car have the same kinetic energy as a 16000 kg truck going 24 km/hr
At speed v = 18.86 m/s = 67.8 km/h a compact car have the same kinetic energy as a truck.
What are some instances of kinetic energy?The energy of motion, or kinetic energy, can be observed in the motion of an object or a subatomic particle. There is kinetic energy in every particle every moving thing. A human walking, a baseball soaring through the air, food falling from a table, and a charged particle in an electric field are all instances of kinetic energy in motion.
Given in the question,
mass of car = 2000kg
mass of truck = 16000kg
speed of truck, vt = 24 km/h = 6.67 m/s
by using Kinetic energy equation for truck,
K = 1/2 mvt²
K = 1/2 ×16000×(6.67)²
K = 355911.2 J
since the kinetic energy is same for car and the truck
Kcar = Ktruck
1/2 mv² = 355911.2
v² = 355911.2/ 1000
v = √355.9112
v = 18.86 m/s = 67.8 km/h
At speed v = 18.86 m/s = 67.8 km/h a compact car have the same kinetic energy as a truck.
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A 7,500-W engine is used to lift an I-beam with a mass of 1,000 kg to a height of 150 m. How much work must be done to lift this mass at a constant speed? How long will it take?
Use these formulas: W = F x d F = m x 9.8 m/s² t = W/P
Answer:
Explanation:
The work that must be done to lift the mass is W = F x d = 1000 kg x 9.8 m/s2 x 150 m = 1,470,000 Joules (1.47 x 106 J).
The time it will take to lift the mass at a constant speed is t = W/P = 1.47 x 106 J/7500 W = 196 seconds (3 minutes 16 seconds).
Explanation:
Power = 7500 watts
mass = 1000kg
height/distance= 150m
work= ?
time = ?
second equation for motion
2nd law of newton
F = ma
for free fall motion a = g= 9.8
force = 9800Newton
now for work done
w = force into displacement
workdone = 1470000 Joules
now finally by power formula
p = workdone upon time
time = workdone upon power
time = 196 second
I hope this would help you!
The gravitational force between two objects is proportional to?
Answer:
it is proportional to masses of two objects
a 0.20 kg yo-yo attached to a 0.60 m string is swung in a circle in the horizontal plane. find the tension in the string if the yo-yo has an angular velocity of 150 revolutions per minute.
According to the query, the strain in the string would be 29.60N if the yo-yo rotated at a rate of 150 minutes per revolution.
What does physics mean by tension?Physicist tension illustration
Why is there tension? Any physical thing that is in contact with another item can apply pressures to that item. Depending on the sorts of objects in touch, we label these friction coefficient differently. We refer to the tension as tension if a rope, thread, chain, or cable is one of the things applying the force.
M= 0.20kg
r= 0.60m
Angular velocity = 150rev/min
ω= 150rev/min[2π rad/1rev][1 min/60 sec]
ω= 15.70 rad/sec
As it revolve in a circle path, the centripetal force is equal to tension in string .
T = mω2r
= (0.20)(15.70)(0.60)
= 29.60N
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a 28-gram bullet strikes and becomes stuck in a 1.35 kg block of wood placed on a horizontal surface just in front of the gun. if the coefficient of friction between the wood and the surface is .28 and the impact drives the block a distance of 8.5 m before stopping, what was the speed of the bullet?
Inside an inelastic collision, a bullet that embeds into a block transfers its momentum to a bullet-block system. Using the principle of momentum conservation, we monitor the subsystems' speeds.
In physics, what is a momentum?As momentum depends on both velocity and the direction of a body's motion, it is quantified by "mass velocity". Since motion is a vector and mass is a scalar, force and motion. Mass times speed equals momentum.
Momentum examples, please?whenever you throw a ball at a person and it hits him in the face. It shows how challenging it would be to put a halt to the situation. In the air, a baseball is swooping. There is a big truck moving. a gun of this type shot a bullet.
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If we try to detect extraterrestrial civilization with radio telescopes, which of the following do we NOT have to worry about?
a. Channel size
b. Time to detect
c. Polarization of radio waves
d. Power source of the telescope
e. Radio frequency
f. Direction in the sky
When trying to detect extraterrestrial civilizations with radio telescopes, we do not have to worry about the power source of the telescope. Thus option D is the correct answer.
When trying to detect extraterrestrial civilizations with radio telescopes, we do not have to worry about the power source of the telescope. The power source is used to operate the telescope and its various components, but it does not affect the ability to detect radio signals from extraterrestrial civilizations.
However, we have to worry about other factors such as channel size, time to detect, the polarization of radio waves, radio frequency, and direction in the sky. The channel size of the telescope is important as it determines the range of frequencies that can be detected. The time to detect refers to how long the telescope must observe in order to detect a signal.
Radiofrequency is also important as it determines the range of frequencies that can be detected. And the direction in the sky is important as the telescope must be pointed in the right direction to detect a signal.
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What is the reaction energy Q of this reaction? Use c2=931.5MeV/u.
The reaction energy Q of the reaction is 195 MeV.
₉₂U²³⁵ + ₀n¹ → ₅₄Xe¹⁴⁰ + ₃₈Sr⁹⁴ + 2 ₀n¹
Mass of reactants = 235.04393 + 1.008665 = 236.052595 amu
Mass of products = 139.92144 + 93.91523 + 2* (1.008665) = 235.854000 amu
Mass defect Δ m = 236.052595 - 235.854000 = 0.198 amu
Reaction energy released Q = Δ m * 931.5
= 0.198 * 931.5 = 185 MeV
What is the reaction energy?
The overall reaction energy also referred to as enthalpy, is expressed as the change in energy between the products and the reactants via subtraction. If the reactant energy is higher than the products, then the overall energy will be negative, resulting in an exothermic reaction.
What is the reaction formula?
A chemical reaction equation gives the reactants and products, and a balanced chemical reaction equation shows the mole relationships of reactants and products. Often, the amount of energy involved in the reaction is given.
Thus, reaction energy Q is 185 MeV.
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which of the following best respresents R= A - B?
PLEASE I NEED HELP ON THIS!!
Answer:
the right side one
Explanation:
a+b will go left
Determine the correct sequence of trials.Add HCl to water and measure pH Add HCl to buffers and measure pH Add NaOH to water and measure pH Make assigned buffer(s) Add NaOH to buffers and measure pH
Dilute the unknown until its absorbance is inside the standard curve. The full strength concentration can be calculated after identifying the diluted quantity if the dilution process is documented.
High concentration is what?A chemical that is present in large quantities relative to the volume is said to have a high concentration in a solution. For example, the Great Salt Lake contains very few fish due to the high concentration of salt.
What is an example of concentration?You can determine how much solute has been dissolved in the solvent by looking at the concentration of the solution. For instance, the concentration may be stated as 1 teaspoon of salt per 2 cups of water if you add 1 teaspoon to 2 cups of water.
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A woman wishes to move a basket of grapes 10 m. How many seconds will it take her if she uses 14 N of force and 2 W of power?
Answer:
Explanation:
Assuming that the woman is moving the basket of grapes at a constant speed, we can calculate the time it will take her by using the equation t = F/P, where t is the time in seconds, F is the force in newtons, and P is the power in watts. Plugging in the given values, we get t = 14/2 = 7 seconds. Therefore, it will take the woman 7 seconds to move the basket of grapes 10 m using 14 N of force and 2 W of power.
a gun with a muzzle velocity of is fired at an angle of above the horizontal. find the horizontal and vertical components of the velocity.
The horizontal and vertical is 1188.321ft/sec and the velocity is g =32.174 = 32.174t.
What direction is horizontal?Horizontal pertains to everything that is perpendicular to the horizon. Anything that forms a 90-degree angle (right triangle) with the straight or the horizon is referred to as vertical because it is the opposite of the horizontal. The line that spans from left to right is therefore considered to be horizontal.
horizontal velocity = Vcos the
= 1200*cos 8
after time t, horizontal velocity = 1200cos8 ft/sec (it is constant) = 1188.321ft/sec
vertical velocity = V sin theta
= 1200*sin8
vertical velocity v= 1200sin8-gt = 167-32.174t ft/sec (till t = 5.19sec)
g =32.174 = 32.174t ft/sec (after t = 5.19sec)
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a lazy physics student is made to walk to the plank. the plank is 8m above the water. if the student is pushed off the plank with a horizontal velocity of 10m/s how long will it take him to hit the water?responses
If a 10 m/s velocity is used to force the pupil off the board. To reach the water will take 1.28 seconds.
What are some examples of velocity?The speed when something that moves in a specific direction is known as its velocity. as even the speed of something like a car driving north on something like a highway or the pace at which a rocket takes off.
Why is velocity either 0 or -?It only contains magnitude since it is a scale parameter. Since a negative sign indicates a direction and rate does not indicate direction, the value can only be positive or zero.
Δy = vi t+1/2 at^2
v_ i = 0
a = 9.8 m/s^2
8 = 0 + 1/2(9.8)t^2
t^2 = 1.63
t = 1.28 s
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A proton moves along the x-axis with vx=1.0×107m/s. a. As it passes the origin, what are the strength and direction of the magnetic field at the (1 cm, 0 cm, 0 cm) position? Give your answer using unit vectors. Express your answer in terms of the unit vectors i^, j^, and k^. b. As it passes the origin, what are the strength and direction of the magnetic field at the (0 cm, 1 cm, 0 cm) position? Give your answer using unit vectors. Express your answer in terms of the unit vectors i^, j^, and k^. c. As it passes the origin, what are the strength and direction of the magnetic field at the (0 cm, -2 cm, 0 cm) position? Give your answer using unit vectors. Express your answer in terms of the unit vectors i^, j^, and k^.
Projectile motion occurs when an item moves both vertically and horizontally through the air while solely being affected by gravity (r = 2 cm).
what is Various proton examples ?A proton is, for instance, the core of a hydrogen ion or the H+ ion. No of the composition, each hydrogen atom has one proton; each particle has two; each lithium atom has three; and so on. Protons are really the positively charged electrons which are evident in the the nucleus of an atom. Atoms, electrons, and neutrons make up an atom. The nucleus, which is in the middle, contains all of an atom's mass. Protons and neutrons, collectively referred to as nucleons, are found in the nucleus.
What is the name of a neutron?Given that it is a compound particle consisting of quarks, the neutron is categorized as a hadron. Due to the fact that the neutron is made up of three valence quarks, it is also categorized as a baryon. The neutron's magnetic moment and finite size both point to it being a composite particle as opposed to an elementary one.
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Which of the following cannot overcome an objects inertia?
O
O
friction
A balanced force (net zero force)
Gravity
An unbalanced force
An unbalanced force cannot overcome an objects inertia.
Define inertia?
A property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force. : an analogous property of other physical quantities (such as electricity) : indisposition to motion, exertion, or change : inertness.The resistance of a body to changes in its momentum. Because of inertia, a body at rest remains at rest, and a body in motion continues moving in a straight line and at a constant speed, unless a force is applied to it.Inertia is property of object, inability to change its position or confugaration of given body.. Mass is measurement of Inertia.. so Unit of Inertia is Kilo Gram. in SI method. If you need, unit of moment of Inertia then it is Kg m^2.
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what will happen if you plug in a 220v appliance into a 120v outlet? 0 / 1 point nothing will happen the appliance could get damaged the appliance will charge at a slower rate the outlet could get damaged
If you plug in a 220v appliance into a 120v outlet then whatever that would happen would depend upon the kind of load.
If one is have a passive load that is without power electronics. For example- a basic heater, then the current in the device would be reduced to the half of the actual and its power will reduce to a quarter according to the Ohm´s law. But if one is having an active load where its power is kept constant, it will consume double the amount of current in order to compensate for the reduction of voltage that has occurred. This could eventually lead to the device getting damaged.
Voltage is defined as the pressure from an electrical circuit's power source which eventually pushes charged electrons (current) through a conducting loop, and enables them to do work such as illuminating a light.
Voltage = pressure, and it is measured in volts (V).
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a spring has a spring constant k of 10.0 n/m. determine the work needed to stretch the spring from 4.0cm to 6.5cm
A spring has a spring constant;Work = 1/2 * k * (Δx)^2,
Work = 1/2 * 10.0N/m * (0.065m - 0.04m)^2,Work = 0.009825 J
What is the constant ?
The constant in mathematics is a number that has a fixed value. A constant can be a single number, such as pi or e, or it can represent a set of numbers, such as the set of prime numbers. Constants are often used in equations and formulas to represent values that do not change. For example, the equation for the area of a circle is A = πr2, where π is a constant with a value of 3.14159.
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