Suri places each planet into a container of water. Saturn will float on top of the water because of the least density among all the planets. Therefore, option (D) is correct.
What is the density?The density can be defined as the mass per unit volume. The average density of a substance is equal to the total mass divided by its total volume.
Mathematically, formula for density can be described as,Density = mass/ volume.
The international S.I. unit of density is represented as Kg/m³. The density is an intrinsic characteristic of a substance as it doesn't depend on the size.As the Density was assumed and for the options, the density can be,
For, Mercury can be 5.4 g/cm³ , Venus can be 5.2 g/cm³ , Neptune can be 1.6 g/cm³, and Saturn is 0.7 g/cm³. Therefore, Saturn will float on top of the water.
Thus, Option D is the correct answer.
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Suppose two identical objects are sitting 1 meter apart. The gravitational force between them is 9N. What would the gravitational force be if they were moved to 3 meters apart?
If the distance between the objects is increased, the new force would be 1N
What is the gravitational force?The term gravitational force has to do with the force that acts between two masses that are on the earth's service.
Now we know that the force that acts on the object can be given by;
F = Gm1m2/r^2
F = force that acts on the object
G = gravitational constant
m1 and m2 = masses of the objects
r = distance about
We can now see that the force that acts on the object would be 1 N.
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The pressure and volume of an ideal monatomic gas change from A to B to C, as the drawing shows. The curved line between A and C is an isotherm. Determine the total heat flow into or out of the gas for the process (including the algebraic sign).
The area of the pressure- volume curve will be the heat flow of the process. Here, the heat flow of the isothermal process is 8 ×10⁴ joules.
What is isothermal process?The process that occur in at constant temperature is called isothermal process. At constant temperature, the volume of a gas is inversely proportional to the pressure.
The area under the curve of a pressure - volume plot will be equal to the heat flow or work done in the process.
Here, the length of the rectangle is the difference in volume = 0.200 m³
height = pressure difference = 4.00 × 10⁵ Pa.
Thus area = 0.200 m³ × 4.00 × 10⁵ Pa
= 8 ×10⁴ joules.
Therefore, the heat flow out of the system is 8 ×10⁴ joules.
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Part A
Choose the correct free body diagram for the case when the ball is at its lowest point
The correct free body diagram for the case when the ball is at its lowest point is tension pointing upwards and weight of the object pointing downwards.
What is the tension in the string at the lowest point in circular path?
The tension in the string at the lowest point in a circular path is equal to weight added to centripetal force required.
Mathematically, the formula for the tension in the string is given as;
T = W + ma
where;
W is the weight on the stringm is the mass of the objecta is the acceleration of the objectAt the lowest point the acceleration of the object is zero, a = 0. The new equation becomes the following;
T = W
The free body diagram of the tension and the weight of the object is given as;
↑ T
Ф
↓ W
Thus, the correct free body diagram consist of the tension force pointing upwards and the weight of the object pointing downwards.
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difference of low frequency and high frequency waves
Answer:
Waves with a higher frequency have crests that are closer together, so higher frequency waves have shorter wavelengths.
Explanation:
A coin is tossed vertically upward and reaches a maximum height of 0.90 m before it comesback down. With what velocity was it thrown, and how long was it in the air?
with explanation please
Answer:
how long the coin was in the air was about 45 how I got your answer was by dividing 900 by 20 bc when u divide u have to add a 0 so that's how I got 900 then I just divided and got 45
PLEASE HELP
Suri, a scientist at NASA, created models of each planet. The models contain the same properties as the actual planets, but at a smaller scale. The first property being tested is the density of the planets. Suri places each planet into a container of water. Which planet will float on top of the water?
A) Mercury
B) Venus
C) Neptune
D) Saturn
Answer:
Explanation:
Let's turn to the table of planetary densities:
Saturn will float in the water ( 0.7 g/cm³ < 1.0 g/cm³)
Obtain an expression for the viscous force acting on a sphere of radius r moving in a viscous fluid with velocity v, if the viscosity coefficient is η.
The force of viscosity is F = k r v η. Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v.
What is viscous force?
Viscosity refers to a material's capacity to resist movement between its layers. It is the force that resists relative motion between the layers. It is also known as viscous force.
What is viscous force formula?
In the above equation, the shear force is the viscous force, which is the only internal resistance that causes shear stress to develop along with the fluid layers. As a result, the viscous force formula will be given as. F=Aμdudy.
Hence F = k r v η is a correct answer.
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What energy transformations occur in your electromagnet when it is turned on?
An electromagnet converts electrical energy to magnetic energy, therefore this is the energy change that occurs.
What is an example of a electromagnet?An epr is a substance that is ordinarily non-magnetic but turns into a magnet when an electrical current flows through it. A curled loop and insulated loop of wire like a spring is a typical illustration of an electromagnet.
What are electromagnets and how do they operate?Electromagnets and armature windings are not always the same thing. Emitting energy from coils of wire, electromagnetic fields are created. Because moving charges create magnetic fields, an electromagnet's create compelling behave similar magnets when an electrical current passes through them.
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11. Two identical cups containing sand from the same bag are placed on a balance.
Cip.A
Which statement about the volume and mass of the sand in the cups is correct?
A. The sand in Cup A has greater volume and greater mass than the sand in Cup B.
The sand in Cup A has greater volume and less mass than the sand in Cup B.
B.
C.
The sand in Cup A has less volume and greater mass than the sand in Cup B.
D. The sand in Cup A has less volume and less mass than the sand in Cup B.
The sand in Cup A has greater volume and less mass than the sand in Cup B.
What is volume?
Volume is a measurement of the three-dimensional space that is occupied.Numerous imperial or US customary units, as well as units derived from SI (such as cubic meter and liter), are often used to quantify it numerically (such as gallon, quart, cubic inch). Volume and length (the cube) have a symbiotic relationship.The volume of a container is usually understood as its capacity, not the amount of space it occupies. In other words, volume is the amount of fluid (liquid or gas) that a container can hold.Volume was initially measured using naturally occurring vessels of comparable shape and then using standardized vessels. Arithmetic formulas can be used to quickly calculate the volume of several simple three-dimensional shapes.To know more about volume, click the link given below:
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what hazard class are automotive batteries walmart
The automative batteries are the corrosive hazard class.
The chemical present inside the battery are very corrosive and poisonous in nature.
Also if the batteries are excessively charged they can burst and cause a huge damage.
There is also very huge disposal problem associated with the battery because the chemical present inside the battery contain acidic material which will decrease the quality of the soil if they are buried in soil.
The human skin is also very sensitive towards the corrosive material of the battery.
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Q1. Hannah has three rods (A, B and C) made from different
metals. One rod is a magnet; one is made of copper; and one is
made of iron. She does not know which rod is which. Each rod
has a dot at one end. (a)Hannah uses only a bar magnet to identify
each rod. She puts each pole of the bar magnet next to the
dotted end of each rod. Complete Hannah's observations in the
table below. Write if each rod is copper, iron or a magnet.
The iron rod gets magnetized when placed near a bar magnet due to magnetic induction while the copper rod does not get magnetized.
What is magnetic induction?
Magnetic induction is the process through which a regular piece of iron briefly develops magnetic properties as a result of another magnet being nearby.Consider a tong nail. Place it on a stand's arm. Spread some iron pins throughout the stand's foundation. You'll discover that the pins are not drawn to the nail. Touch a magnet to the nail's tip now. Some pins stick to the nail as the end is brought close to the head. It occurs as a result of the nail transforming into a magnet and acquiring magnetic properties. when the magnet is taken out of the nail's head the pins are about to drop.To know more about magnetic induction, click the link given below:
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a ball is thrown horizontally with an initial velocity of 20 ms from the top of a tower 60 m high
From the peak of the tower, it will fall 92.2 meters to the ground.
Vi(vertical) = 0;
h = 60 m;
h = Vi*t + 1/2g*t2;
60 = 0; t = 60/5;
time = 12; t = sqrt(12) seconds;
t = 3.5 seconds.
Vi(horizontal)=20 m/s
20 m/s remains constant since there is no force opposing it in the horizontal direction.
70 meters are equal to 20 m/s times 3.5 seconds in range.
70 meters from the tower's base, the ball will land on the ground.
distance from the tower's summit is equal to sqrt(702+602)
= sqrt(4900 + 3600), or 92.2 meters.
From the peak of the tower, it will fall 92.2 meters to the ground.
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All the matter that will ever be was created from the pure energy
of the...
A: sun.
B: cosmic (microwave) background radiation.
C: extreme stars.
D: Big Bang.
The universe's continual supply of energy and matter comes from the enigmatic big bang. Even if the total amount remains constant, this spreads out over time and becomes less and less beneficial.
However, the energy required for the Big Bang at the beginning of the Universe—that is, of everything—must have come from somewhere. Many cosmologists believe that it originates in the phenomenon known as quantum uncertainty, which allows energy to appear seemingly out of thin air.
In the instants following the Big Bang, the majority of the hydrogen and helium in the universe were produced. Later came the heavier components. A large variety of elements are created and dispersed by supernova explosions.
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Name that Newtonian law.
You exert a net force of 4 N to the right on an object with a mass of 8 kg, the object will accelerate at 0.5 m/s2 to the right.
A hockey puck slides on ice.
My car hits a mosquito, and the mosquito hits back, equally.
Mrs. Hankinson has a zero total external forces acting on her - she keeps moving at a constant velocity, if she is already moving.
You exert a net force of 4 N to the right on an object with a mass of 8 kg, the object will accelerate at 0.5 m/s2 to the right. Newton second law
A hockey puck slides on ice. Newton's first law
My car hits a mosquito, and the mosquito hits back, equally. Newton's third law
Mrs. Hankinson has a zero total external forces acting on her - she keeps moving at a constant velocity, if she is already moving. Newton's first law
What is the Newton law?We know that according to the Newton law, the reason for motion is force. As such the force that is exerted on a body is the reason why the object would move from one point to the next.
There are three laws of motion that was put forward by Newton. The first law explains the relationship between force and the inertia of an object. The second law addresses the relationship between rate of change of impressed force while the third force deals with the concept of action and reaction.
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Questions 14-16
The following diagrams each show an object of mass m moving with instantaneous velocity v. in
each case, F is the applied force, and f is the frictional force exerted on the object. In case I, the
object moves in a circle with constant speed.
(A) None
(B) I only
(C) II only
(D) III only
(E) I, II, and III
14. In which of these cases are velocity and the acceleration in the same direction at the
instant shown?
15. In which of these cases are the velocity and acceleration in opposite directions at the
instant shown?
16. In which of these cases are the velocity and the net force perpendicular to each other at
the instant shown?
14. None of these cases are velocity and the acceleration in the same direction at the instant.
15. I, II, and III of these cases are the velocity and acceleration in opposite directions at the instant
16. case I of these cases are the velocity and the net force perpendicular to each other at the instant.
When is acceleration and velocity in same direction?If the velocity and acceleration are in the same direction (both have the same sign and both positive or negative), the object is accelerating. If the velocity and acceleration are opposite (with opposite signs), the object is slowing down.
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which best explains the law of conservation of mass
The law of conservation of mass emphasizes the fact that it is not possible to create or destroy the mass in this universe. Mass just changes its form from one to another, it is never created nor destroyed.
The statement mentioned above states that the mass of reactants and products have equal mass irrespective of the physical state.If the mass of reactants and products becomes unequal, then it would contradict the law of conservation. However, it is clearly mentioned that the mass of reactants and products will remain the same, hence complimenting the law of conservation of motion.Therefore, the law of conservation of mass is best described by - The mass of the reactants and products is equal and this mass is not dependent on the physical state of the substances.
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[NOTE: THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS: Which best describes the law of conservation of mass?
(A) The coefficients in front of the chemicals in the reactants should be based on the physical state of the products.
(B) Products in the form of gases are not considered a part of the total mass change from reactants to products.
(C) When reactants contain both a solid and a liquid, the solid counts toward the overall mass and the liquid does not.
(D) The mass of the reactants and products is equal and is not dependent on the physical state of the substances.]
Two equal-mass stars maintain a constant distance
of 8.0 x 10^10 m and rotate about a point mid-
way between them at a rate of one revolution every
12.6 yr.
(a) Why don't the two stars crash into one
another due to the gravitational force between
them?
(b) What must be the mass of each star?
A. Centripetal force acting on the two stars is the reason why the two stars will not crash into one another
B. The mass of each stars, given they maintain a constant distance of 8×10¹⁰ m is 7.68×10²⁷ Kg
A. Why don't the two stars crash into one another?
Centripetal force is the force that acts to keep an object moving in a circle. Since the two stars undergoes revolution, this means they rotate in a circle. Thus, centripetal force is acting on them.
Therefore, we can say that the two stars will not crash into one another due to the centripetal force
B. How do I determine the mass of each stars?
We can obtain the mass of each stars as illustrated below:
F = GM₁M₂ / r²
Note: They rotate mid-way. Thus distance apart (r) = 2r
F = GM₁M₂ / (2r)²
F = GM₁M₂ / 4r²
Also, centripetal force is given as:
F = mv² / r
Thus, we have:
mv² / r = GM₁M₂ / 4r²
But
v = 2πr / T
v² = (2πr / T)² = 4π²r² / T²
M₁ = M₂ = m
Thus, we have
m4π²r² / rT² = Gmm / 4r²
4π²r / T² = Gm / 4r²
Cross multiply
mGT² = 4r² × 4π²r
mGT² = 16π²r³
Divide both sides by GT²
m = 16π²r³ / GT²
From the question given, we have:
Distance (r) = 8×10¹⁰ mPeriod (T) = 12.6 years = 12.6 × 3.154×10⁷ = 3.97×10⁸ sGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Pi (π) = 3.14Mass of each stars (m) =?m = 16π²r³ / GT²
m = [16 × 3.14² × (8×10¹⁰)³] / [6.67×10¯¹¹ × (3.97×10⁸)²]
m = 7.68×10²⁷ Kg
Thus, the mass of each stars is 7.68×10²⁷ Kg
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11. Why do the lights in your home come on almost instantaneously when you turn, on the switch?
A - When the circuit is completed, there is a rapid rearrangement of surface charges in the circuit.
B - Charges store energy. When the circuit is completed, the energy is released.
C - Charges in the wire travel very fast.
D - The circuits in a home are wired in parallel. Thus, a current is already flowing.
E - Charges in the wire are like marbles in a tube. When the circuit is completed, the charges push each other through the wire.
Answer:
because its like that which do not hencintrate and prostate in the future work per week-20 Earning in the future and we are keen on the walls of our english and would like the same to happen as soon.
is lithium batteries a limited quantity item
Lithium and lithium-ion batteries are transported in both large and small volumes.
For instance, a single box could contain as little as five batteries, whereas a pallet could hold over 1,000, or the batteries could be enclosed in or packed with equipment.
On the other hand, lithium batteries, which contain lithium metal, cannot be recharged. Lithium-ion batteries can be recharged but do not contain lithium metal.
Lithium and lithium-ion batteries are mostly utilized in consumer applications and are exempt from dangerous goods/hazardous materials rules. Small lithium batteries are often used in timepieces and cameras. Lithium-ion batteries are extensively used in laptops and cell phones.
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When you are sitting in a chair your body exerts a on the chair and the chair exerts the force back?
When we sit on the chair, the chair is actually plying a force back on us in response to our force wielded upon the president because of Newton's third law.
What is Newton's third law?
The third law of Newton asserts that when bodies interact, they ply forces that are equal in size and directed in the contrary direction. Another name for the third law is the law of action-reaction law. This law is pivotal for understanding issues with static balance, where all pressures are in balance, but it also remains true for bodies moving at a constant or accelerated speed.
It does not only use secretary styles the forces it represents are factual forces. For illustration, a book laying on a table exerts downcast pressure equal to the weight of the book on the table. The table produces an equal and contrary force on the book in agreement with the third law.
Thus, According to Newton's third law there's an equal and contrary action and counteracts us so that neither move.
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A mass on the end of a length of rope is being swung in a circle of radius 3.2 m at an angular velocity of 0.71 rad/s. How fast is it moving?
Answer:
[tex]\huge\boxed{\sf v = 2.27\ m/s}[/tex]
Explanation:
Given data:Angular velocity = ω = 0.71 rad/s
Radius = r = 3.2 m
Required:Linear velocity = v = ?
Formula:v = rω
Solution:v = (3.2)(0.71)
v = 2.27 m/s
[tex]\rule[225]{225}{2}[/tex]
Microwave ovens operte at 2.45 GHz, Bluetooth electronics and internet routers work at2.4 GHz.Predict which object has the longer wavelength, showing your calculations evidence, to support your prediction .
Answer:
The object with the longer wavelength is the microwave oven. This can be determined using the equation λ = c/f, where λ is the wavelength, c is the speed of light (3 x 10^8 m/s), and f is the frequency.
For a microwave oven:
λ = (3 x 10^8 m/s) / (2.45 GHz)
λ = 1.22 x 10^-2 m
For a Bluetooth electronic/internet router:
λ = (3 x 10^8 m/s) / (2.4 GHz)
λ = 1.25 x 10^-2 m
Therefore, the microwave oven has a longer wavelength.
Explanation:
A boy is skiing down a hill with a velocity of 3.5 m/s. It takes 8.5 seconds to
reach the bottom. What distance is the skier traveling?
O 0.41 meters
O29.75 meters
O 2.43 meters
O 12 meters
Answer:
B. 29.75 meters
Explanation:
Distance = speed x time
Distance = 3.5 x 8.5
Distance = 29.75 m/s
A 8 kg body moves towards the west with a momentum of 30 kg m s¹. A 20 N force to the east acts on the body for a period of 15 s. Determine the magnitude of i) the impulse of the force. ii) the change in the momentum of a body. iii) the final momentum of the body. iv) the final velocity of the body, [5 marks]
Mass of body = 8kg
Momentum of body = [tex]30kgms^{-1}[/tex]
Force = 20N
Time for which force acts = 5s
Impulse of the force = Force × time for which force acts
= 20 × 5= 100Ns
Change of momentum = Impulse of the force= 100Ns
Therefore, the impulse of the force= 100Ns
Change of momentum is 100Ns
The final momentum of the body = 100Ns
The final velocity of the body is 5m/s
What is momentum?
Momentum is the result of a particle's mass and velocity. Being a vector quantity, momentum possesses both magnitude and direction.
According to Isaac Newton's second equation of motion, the force applied on a particle is equal to the time rate of change of momentum. Check out Newton's laws of motion.
According to Newton's second law, if a particle is subjected to a constant force for a specific amount of time, the result of the force and time (referred to as the impulse) is equal to the change in momentum.
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Explain the difference between Pavlov's classical Conditioning, and Skinner's Operant
Conditioning, give examples to illustrate how behavior can be learned according to each
one of those conditioning. Explain the example after explaining the process.
Skinner's Operant Conditioning focus stressed that the consequences of a behavior will indicate if there is possibility of it being repeated and also the human behavior can be attributed to something in a person's environment.
Pavlov's classical Conditioning stressed that two stimuli can be linked together so that there can be new learned response in indivisuals .
Example of Pavlov's classical Conditioning is that a dogs could be conditioned to salivate at the sound of a bell if it was programmed to ring at the time of food.
Example of Skinner's Operant Conditioning is that of negative reinforcement which was demonstrated by placing a rat in Skinner box which then subjected to unpleasant electric current and make it to experience some discomfort.
What is Classical conditioning?Classical conditioning can as well be described as the Pavlovian or respondent conditioning which is the learning that do take place when two stimuli are linked together and they can bring about new learned response in a person or animal.
Operant conditioning was the one that stressed that the cause of human behavior can be linked to the something in a person's environment.
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How will you convert an iron nail into a magnet with the help of electric current?
To finish the electromagnet, connect the copper wire's exposed ends to the opposing battery connections. A magnetic field is produced by current passing via the wire coiled around the nail.
What causes electric current?A loose electron is drawn to a proton to become neutral if an electron moves to the wire. Lack of electrons can result from pushing electrons from out their orbits. Electric current is the name given to the constantly moving electrons in wire.
What is electric current and its types?Electrons are moving constantly in current electricity. Direct current (DC) and dc voltage (AC) are the two types of current used in electricity (AC). Electrons move only in the direction of direct current. Direct current is produced by batteries. The resistance to potential difference ratio determines the current. It is displayed as (I). I = V/R is the formula currently in use.
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1000 cm³ of air at 20 °C and 101.35 kPa is heated at constant pressure until its volume doubles. a) Use the ideal gas equation to calculate the final temperature of the gas.
From Charles's law, the magnitude of the final temperature is 586 K
What is an Ideal Gas ?An Ideal gas is a gas which obeys ideal gas equation at all pressures, volumes and temperatures. The ideal gas equation can be express as
PV = nRT
Where
P = pressureV = volumen = number of moleR = universal molar gas constantT = TemperatureGiven that 1000 cm³ of air at 20 °C and 101.35 kPa is heated at constant pressure until its volume doubles.
From the ideal gas equation,
P1 = P2 = 101.35 kPaV1 = 1000 cm³V2 = 2000 cm³T1 = 20 + 273 = 293 KT2 = ?To calculate the final temperature of the gas, we will use the formula below
V1/T1 = V2/T2
Since Pressure is constant
Substitute the necessary parameters into the formula
1000/293 = 2000/T2
Cross multiply
1000T2 = 586,000
T2 = 586,000/1000
T2 = 586 K
Therefore, the final temperature of the gas is 586 K
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Will a piece of paper produce the same kind of reflection as the mirror? Explain your answer
The mirror would be a better reflecting surface than the paper.
What is reflection?The term reflection has to do with the process by which the light that hits a surface is bounced off the surface, Now we know that reflection can only occur when we have a plain surface.
Mirror is a plane surface and as such, it is able to reflect the light that falls on it. Water is not a plane surface thus it is not able to reflect the surface. Hence, the reflection of the mirror and the piece of paper can not be the same.
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the doppler effect is best described as
The Doppler effect is the apparent difference in frequency between sound or light waves as they leave a source and as they arrive at an observer.
Theory- It is brought on by the relative motion between the observer and the wave source. Radar and contemporary navigation all make use of this phenomenon in their operations, as well as in astronomical measurements and Mossbauer effect research. Austrian physicist Christian Doppler first described it in 1842.Working Principle-When a star is seen from Earth, its light shifts toward the red end of the spectrum (lower frequency or longer wavelength) when the Earth and star are moving apart, and toward the violet end of the spectrum (higher frequency or shorter wavelength) when they are moving together. The Doppler effect is a crucial component of current universe theories and is used to study star motion and look for double stars.To know more about Doppler effect -
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What are 3 examples of a constant?
Angle, elastic strain, Poisson's ratio are the 3 dimensionless constant unit.
In order to determine an equation's form or, more frequently, to confirm the accuracy of a calculation's result as a safeguard against numerous small errors, dimensional analysis uses a set of units.
To find out if your algebra is correct, use dimensional analysis. For instance, if you accidentally divided a mass by an area to obtain density, the answer would be given in kilograms per square meter (kg/m2). We would notice the error since we are aware that density must be expressed in kilograms per cubic meters. Be aware that improper application of A, equals, pi, d, squared, A=d2 or even A, equals, d, squared, A=d2 will invalidate the method.
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