The Big Bang signified the beginning of the expansion of the universe from a singularity (or a region very close to one), a single point that was infinitely small, infinitely hot, and endlessly dense.
What eras that are used to the history of the universe?It is the era of the stars, galaxies, and life. Approximately 150 million years after the Big Bang, the universe entered this phase, which is predicted to last up to 86 billion years from now, when the cosmos will be able to celebrate its 100 billionth birthday.
Therefore, From first to last: Planck era, GUT era, electroweak era, particle era, era of nucleosynthesis, era of nuclei, era of atoms, era of galaxies
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A principal theory in social psychology is social exchange theory. According to this theory, we will be most likely to help othersA. who have already helped us.B. who are closely related to us.C. when the benefits outweigh the costs.D. for whom we feel empathy.
Answer:
Explanation:
C. When the benefits outweigh the costs.
Jupiter's _____ _____ ______ is a giant storm about three times wider than the diameter of Earth and at least 100 years old.
Jupiter's great red spot is a giant storm about three times wider than the diameter of Earth and at least 100 years old.
A massive storm larger than Earth that has been raging for hundreds of years is Jupiter's famous Great Red Spot.
Numerous moons orbit Jupiter around it. Jupiter also has a number of rings, but they are much fainter and made of dust rather than ice, unlike the well-known rings of Saturn.
It is mostly Jupiter's fault that it is difficult to comprehend the Great Red Spot. Jupiter is a gas-dominated planet that is a thousand times larger than Earth. Its core is surrounded by a liquid ocean of hydrogen, and the atmosphere is primarily made up of helium and hydrogen.
Jupiter's clouds also make it difficult to make precise observations of its lower atmosphere. While some studies of Jupiter have looked at regions in its lower atmosphere, orbiting telescopes and probes studying the Great Red Spot can only see clouds dispersed high in the atmosphere.
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A chef drop a pumpkin pie of ma 1. 7kg from a height of 1. 875 meter. How long doe it take the pie to hit the ground?
If a chef drops a pumpkin pie of mass 1.7 kg from a height of 1.875 meter, the time taken by the pie to hit the ground is 0.62 s
According to equations of motion,
s = ut + 1 / 2 at²
s = Distance
u = Initial velocity
t = Time
a = Acceleration
Since it is dropped,
u = 0
g = 9.8 m / s²
s = 1.875 m
s = ut + 1 / 2 at²
1.875 = 0 + ( 1 / 2 * 9.8 * t² )
t² = 1.875 / 4.9
t² = 0.385
t = 0.62 s
Therefore, the time taken is 0.62 s
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Based on what you learned about solar activity, select all of the correct statements from the following list.
The Sun does not rotate.
Solar activity can produce auroras and communication blackouts on Earth.
The solar constant never changes.
Sunspots are cooler areas of the photosphere.
Numbers of sunspots vary in approximately an 11-year cycle.
Solar activity can produce auroras and communication blackouts on Earth the correct statements from the following list.
What exactly is solar activity?A fraction of a second to billions of years are covered by the variations in the sun's magnetic field. Solar activity includes coronal mass ejections, high-speed solar winds, solar energetic particles, and solar flares.
Solar flares, coronal mass ejections, high-speed solar wind, and solar energetic particles are the four primary categories that may be used to categorise solar activity that is related to space weather. Only when a solar flare occurs on the sun's surface facing Earth do they have an effect on our planet.
The occurrence of events like solar flares and coronal mass ejections increases when the sun is active.
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the perception of flashing lights on a christmas tree as continuous movement can be explained by the optical illusion
The perception of flashing lights on a christmas tree as continuous movement is due to optical illusion.
Perceptual Illusions: the misinterpretation of a real external, sensory experience. The action of deceiving, especially by appearances. An instance of the sense perception of an external object suggesting a false belief as to its nature.
Induced Motion: an illusion of motion, experienced because we have a strong tendency to assume that the object moves, while the background is stationary.Optical Illusions: an instance of something having an appearance so resembling something else as to deceive the eye; mental misapprehension caused by this. An illusion of vision usually affecting “spatial” relations. Also referred to as ‘visual illusions.’Somatic Illusions: tricks used to make parts of your body feel like they are growing, shrinking, bending, etc. Examples (include) ‘Pinocchio,’ ‘Shrinking Waist,’ ‘Doorframe,’ and ‘Rubber Hand.’To know more about optical illusions visit:
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c) use the ruler tool (the units are in mm) on the bottom right to measure the extension of the spring with the 100g mass. convert this mass in grams to kg and then convert to w weight
A gram is now defined as 0.001 kilograms (kg).
Hooke's Law states that F = -kx.
Spring constant is the name given to the proportional constant k. It represents a stiffness measurement for the spring.
Calculation:
Given that, mass = 100 g = 0.1 kg
We shall multiply mass by the gravitational acceleration to determine the weight:
= 0.1 * 9.8 = 0.98
Force has a value of 0.98 N, which is also the value.
There is a 170 mm extension.
In light of this, the 100 g spring's extension is 170 mm.
What is the mass of a gram?In terms of Planck's constant, a gram is now defined as 0.001 kilograms (kg). Under standard gravity, a gram of mass has the same weight as a gram of force.
What exactly is the mass formula?It is defined as the mass of one mole of the chemical substance or as a ratio of the mass of a chemical compound to its constituent chemical component. Molar mass is measured in kg/mol. The mass formula is given as. Mass = ρ × v.
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A bow wave is produced when a speed boat moves as fast as the waves it produces. faster than the waves it produces. O nearly as fast as the waves it produces. none of the above
A bow wave is produced when a speed boat moves nearly as fast as the waves it produces.
A bow wave is produced when a speed boat moves. The faster the boat moves, the bigger the bow wave. The bow wave is created by the boat pushing water out of the way.As the water is pushed out of the way, it creates a wave that travels in front of the boat.The wave eventually reaches the shore and can create a dangerous situation for swimmers and people in the water.This displaced water then has to go somewhere, so it creates a wave. The faster the boat moves, the more water it displaces and the larger the wave becomes. Bow waves can be a nuisance for other boats trying to move through the water.They can also be dangerous if they’re large enough.To know more about waves visit:
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The purpose of the area divider is to:
a.) accomodate large differential movemenets between adjoining... b.) accomodate some movement in the membrane itself c.) channel water toward roof drains d.) channel water toward scupper drains. e.) help the membrane...
The purpose of the area divider is to accommodate some movement in the membrane itself.
Essentially, a classical particle cannot cross a potential barrier. According to the quantum theory, an exponential with a negative real exponent describes how a particle's motion continues under a barrier. Such a function degrades quickly, and if the width (or height) of the barrier is significant, the amplitude of the wave function behind the barrier is insignificant, making it impossible for a particle to pass through the barrier.
However, the exponent retains an appreciable value behind a relatively narrow and/or low barrier, indicating that a particle may exist there. The likelihood of a particle passing through a barrier is given by the square of the ratio between the transmitted wave's amplitude behind the barrier and the incident wave's amplitude. The transparency of the barrier is the name given to this value.
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An object has total energy Ewhen traveling at a speed of 0.70c) The same object has total energy (when traveling at 0.90c) What is the ratio Ea E? O.00 E=mc2=nMo C2 b) 0.8 c) 1.6 d) 2.7 e) 1.3 Ji-
E1:E2 ratio is 0.60 for an item with total energy E moving at a speed of 0.70c. Total energy of the same thing (when travelling at 0.90c).In order to meet the energy needs of a growing global population.
Total energy strives to deliver energy that is affordable, dependable, and cleaner. The speed of an object, also known as v in kinematics, is a scalar quantity that refers to the size of the change in that object's position over time or the size of the change in that object's position per unit of time is called as speed.
E = mc^2 = Moc^2/(1-(v^2/c^2))^1/2
for, 0.7c = 1/(1-(0.7^2))^1/2 = 1.4
for, 0.9c = 1/(1-(0.9^2))^1/2 = 2.294
E2/ E1 = 1.4/2.294 = 0.60
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distinguish between absorption and emission of energy
Electrons radiate when their regain their prior energies. Electrons gain energy & ascend into elevated amounts as they absorb energy.
What is the process of absorption?The process of absorption is how the blood takes in the byproducts of digestion so that it can supply the rest of the body. The mucus allows again for passage of a digested materials into to the lymphatic system or blood during absorption. The following mechanisms allow for absorption. basic diffusion
What are the 4 types of absorption?Characteristics of absorption and digestion in general. Gastrointestinal products are absorbed through four different mechanisms: exocytosis, passive diffusion, simple diffusion, or endocytic.
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For general projectile motion with no air resistance, the horizontal component of a projectile's velocity
A. remains a non-zero constant
B. continuously decreases
C. continuously increases
D. first decreases and then increases
E. remains zero
The horizontal component of a projectile's velocity remains non-zero constant for general projectile motion without air resistance. Projectile motion is the motion of an item as defined in physics.
Within the gravitational field. Projectile motion is exemplified by the upward vertical toss of a body. The air resistance that a body experiences during projectile travel is disregarded, leaving only the gravitational force to act on the body. A moving object's velocity is a function of time and measures how quickly its position changes in relation to a frame of reference. When an object is moving, its speed and direction are specified by its velocity. When an object moves, its location in relation to its environment changes.
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A system comprising blocks, a light frictionless pulley, a frictionless incline, and connecting ropes is shown in the figure. The 9.0-kg block accelerates downward when the system is released from rest. The tension in the rope connecting the 6.0-kg block and the 4.0-kg block is closest to..?
The tension in the rope connecting the 6.0-kg block and the 4.0-kg block is closest to 42N.
What will the tension be?From the information, we have obtained three equations for the three unknowns a, T1 and T2:
6a = T1 - 3g
4a = T2 - T1 - 2g
9a = 9g - T2
The third equations gives
T2 = 9g - 9a
Substituting that in the second equation gives:
4 a = 9 g - 9 a - T1 - 2 g
13 a = 7 g - T1
In this case, we have reduced the problem to two equations in two unknowns:
6a = T1 - 3g
13 a = 7 g - T1
Solving further will be:
78 a = 13 T1 - 39 g
78 a = 42 g - 6 T1
Subtracting the second from the first eliminates a:
0 = 19 T1 - 81 g
T1 = 81/19 * g
= 81/19 × 9.8
T1 = 42 N
The tension is 42N.
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if an object is moving eastward and slowing down, then the direction of its velocity vector is .
If an object is moving eastward and slowing down, then the direction of its velocity vector is east.
Understanding the idea of the velocity vector and how it significantly relates to that of position is necessary in order to solve the given problem. There will be some direct relationship between the distance traveled by the object and the magnitude of velocity at the same time interval since the mathematical relation for velocity is given by differentiating the expression for the distance traveled at any time instant.
Any object that has a tendency to move in a particular direction will also have a corresponding velocity vector. According to the concept presented, the object's velocity vector will also be moving in an easterly direction in the given situation since it is moving in that direction.As a result, it is inferred that an object moving in an easterly direction will also have its velocity vector point in that same direction.To understand more about velocity -
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A force of 32N is applied to object of mass MKY which is at rest on a smooth horizontal surface if the product if 8M/S^2. find the value of M
Answer:
m=4kg
Explanation:
F=32, m=?, a=8ms^-2
F=ma
32=8m
32/8=m
m=4kg
What three factors determine the amount of voltage induced into a conductor?
1.The turns of wire.
2.The strength of the magnetic field.
3.The speed of the cutting action.
Three factors that determine the amount of voltage induced into a conductor are : size of the magnetic field, active length of the conductor and speed at which the conductor passes through the field.
What are the factors that determine amount of voltage induced in a conductor?Faraday's Law explains that inducing a voltage in conductor can be done by either passing it through a magnetic field or by moving the magnetic field past the conductor and if the conductor is part of a closed circuit, an electric current will flow.
Coils of wire are used to increase the induced voltage and current because the EMF generated is proportional to the time rate of change of magnetic flux as per Faraday's Law.
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21. The coefficient of friction acting upon a 1500 kg car is 0.75. The car is making a 180-degree turn around a curve with
a radius of 25 meters. Determine the maximum speed with which the car can make this turn.
a. 187.5 m/s
b. 209.44 m/s
c. 13.69 m/s
d. 7.5 m/s
The maximum speed with which the car can make the turn is 13.69 m/s (Option C)
How do I determine the maximum speed?We'll begin by obtaining the force. This can be obtained as follow:
Mass (m) = 1500 KgAcceleration due to gravity (g) = 10 m/s²Normal reaction (N) = mg = 1500 × 10 = 15000 NCoefficient of friction (μ) = 0.75Force (F) = ?F = μN
F = 0.75 × 15000
F = 11250 N
Finally, we shall determine the maximum speed. Details below:
Radius (r) = 25 metersMass of car (m) = 1500 KgForce (F) = 11250 NMaximum speed (v) =?F = mv²/r
11250 = (1500 × v²) / 25
Cross multiply
1500 × v² = 11250 × 25
Dive both sides by 1500
v² = (11250 × 25) / 1500
Take the square root of both sides
v = √[(11250 × 25) / 1500]
v = 13.69 m/s
Thus, the maximum speed is 13.69 m/s (Option C)
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why do we say that force is a vector quantity
Force is a vector quantity because its acceleration times a scalar constant (mass) equals the force (a vector quantity).
Why is force considered a vector quantity?The product of an object's mass and acceleration is used to calculate the force acting on it. A vector quantity is acceleration. Since force is a scalar constant (mass) multiplied by acceleration, which is a vector quantity, force is also a vector quantity (a vector quantity).
Because it genuinely depends on the direction in which a force is applied, force can be thought of as a vector quantity. Physically, the force can be felt as a push or a pull. This is illustrated by many physical examples.
For instance, it makes sense that we must push an object upward in order to make it move upward. It simply remains fixed if we push it downward. Knowing which direction it is pushed is crucial.
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a student has a small metal sphere that hangs from an insulating string. the student, in seeking to determine the charge on the sphere, brings a positively charged rod near the sphere and finds that the sphere is attracted to the rod. the student then brings a negatively charged rod near the sphere, and finds that the sphere is again attracted to the rod. which of the following conclusions, if any, can be drawn from these results?
The sphere is again attracted to the rod. The sphere must be empty from an insulating string.
What is the efficiency of an insulator string?As a result, the string efficiency of a suspension type insulator is defined as "the ratio of voltage across the whole string to the product of voltage across the disc nearest to the conductor and the number of discs in the string." Transmission lines on steel towers are supported by suspension insulators, which isolate the lines from the tower. They are critical to the reliable delivery of power. Suspension insulators are employed in two or more configurations depending on the transmission voltage and usage area. The string is free to swing in any direction, giving the transmission line a lot of flexibility.
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a spehere with a mass m and a radius r rolls down a ramp that makes an angle theta with the horizontal
The acceleration of the roll ramp is a = mR² sinθ / I + mR²
The mass of the given object is m
And the radius of the given object is r
the angle of the ramp is given as θ
The expression to calculate the given equilibrium of the object :
mgsinθ - f = ma
this implies f = m( a + gsinθ)
Here we can write
I a' = fR
a' = ( m ( a + gsinθ) ) R / I
The expression without the value of friction can be written as
a = Ra'
Substitute the values in the above expression and we will get:
I a = mR² ( a + gsin θ )
On further solving it by opening the brackets we get
a = mR² sinθ / I + mR²
The acceleration of the roll ramp is a = mR² sinθ / I + mR²
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PLEASE ANSWER WILL MARK BRAINLIEST IF YOU EXPLAIN HOW YOU GOT THE ANSWER!!!!!!
I’m not sure if the answer I chose is correct or not
If there is a decrease in the angle of inclination, the acceleration would decrease accordingly.
What is the acceleration?We know that the acceleration is the change in the velocity of the object with time. Given that the mass of the pulley remains the same and the puly is being moved up the incline as we can see.
We have to also recall that we have been told that the incline is frictionless and as a result we are not going to consider the frictional force. In any case, the force that moves the pully along the incline stull depends on the angle of inclination.
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A force of 30 newtons and a force of 20 newtons act
concurrently on an object. Which of the following
resultant forces could be produced using these two
forces?
Answer:
Explanation:
Given:
F₁ = 30 N
F₂ = 20 N
_________
R - ?
If the forces act along one straight line, then 4 combinations are possible:
Salt water is more dense than fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the volume of salt water displaced by the ship A.is less than the volume of fresh water. B.is greater than the volume of fresh water. C.is the same as the volume of fresh water. D.cannot be compared without knowing the mass & volume of the ship.
Answer:
Buoyant force B = V * ρ volume * density
Since the buoyant force is the same in both cases (salt & fresh)
a smaller volume is required when the density of the displaced water is greater
(A) is correct
A force of 5. 0 n moves a 6. 0 kg object along a rough floor at a constant speed of 2. 5 m/s.
Answer:
BLACKPINK IN YOUR AREA I AM SO GOOD AT MATH
Explanation:
SO GOOD AT MATH BLACKPINK IN YOUR AREA
a scale from which a rock is suspended reads 5 n when the rock is out of water and 3 n when the rock is submerged. buoyant force on the rock is
A rock suspended by a weighing scale weighs 3 N when submerged in water and 5 N out of water. F= N1-N2. Substitute 5N for F1 and 3n for F2 above the expression to get F. F=5N-3N = 2N.
What is the rock's buoyant force?The weight of the water volume that the submerged object displaces is what creates the buoyant force. The buoyant force is the weight of water that has the same volume as the rock because the boulder is totally submerged. The buoyant force is still present even though the rock is sinking; it is merely smaller than the rock's weight.
What is seen on the weighing scale's reading when the lift accelerates its descent?Your perceived weight is equal to the normal force. Therefore, when the elevator accelerates upward or downward, you truly feel a little heavier than usual and a little lighter than usual.
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If the acceleration due to gravity on the Earth is 10m / (s ^ 2) and an gift has a mass of 50 kg, what is the force applied on the object by gravity?
Answer: BLACKPINK IN YOUR AREA SO GOOD AT MATH
Explanation:
PERIOD AHH MATH IS AAMAZING
A photon with energy 2.30 eV is absorbed by a hydrogen atom. A is 3
b) Find the speed of the electron released from the state in part (a) when it is far from the nucleus.
km/s
The speed of the photon has been obtained as 8.9 * 10^5 m/s.
What is the speed of the electron?We know that the energy of the photon would be converted to the kinetic energy of the photon s it is moving. We would now go ahead to obtain the energy in joule.
We now have;
Energy in joules = 2.30 * 1.6 * 10^-19
= 3.68 * 10^-19 J
Then we know that;
KE = 1/2mv^2
KE = kinetic energy
m = mass of the electron
v = speed of the electron
Then
v^2= 2KE/m
v = √2KE/m
v = √2 * 3.68 * 10^-19/9.11 * 10^-31
v = 8.9 * 10^5 m/s
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Correctly identify the bones of the skull. Frontal bone Sphenold bone Vomer Temporal bone Inferior concha Parietal bone Mandible Zygomatic bone Lacrimal bone Ethmoid bone Frontal bone Maxilla Nasal bone Nasal bone
The bones of the skull includes the following:
Frontal boneSphenoid boneTemporal bone Parietal bone Ethmoid boneWhat is the frontal bone?
The frontal bone in an adult is an unpaired bone that is a part of the boney structure that forms the anterior and superior portions of the skull.
The frontal bone consists of two parts which are
the vertically oriented squamous part, and the horizontally oriented orbital part,These two parts makes up the bony part of the forehead, part of the bony orbital cavity holding the eye, and part of the bony part of the nose respectively.
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Planets a and b are both the same size, but planet b has three times the mass of planet a. How does the weight of an object compare on the two planets?.
A comparison of an object's weight between the two worlds An object's weight is the same on both planets.
Why do objects of the same mass weigh differently on various planets?The weight of an object is determined by its mass and how strongly gravity pushes on it. How far apart two objects are from one another determines how strong gravity is. Because of this, the same thing weights differently on several planets.
What connection between the planets' weight and sizes do you notice?The gravity of planets, moons, and stars is the same. Depending on their size, they have different amounts of gravity. Therefore, gravity is different for larger and smaller planets. A human with more mass has greater gravitational pull, just like the planets.
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A reasonably uniform magnetic field over a limited region of space can be produced with the Helmholtz coil, which consists of two parallel coils centered on the same axis. The coils are connected so that they carry the same current I. Each coil has N turns and radius R, which is also the distance between the coils.
(a) Find the magnitude of the magnetic field at any point on the z-axis shown in the accompanying figure. (Use any variable or symbol stated above along with the following as necessary: z and µ0. Assume the origin is located halfway between the coils.)
(b) Show that dB/dz and d 2B/dz2 are both zero at z = 0. (These vanishing derivatives demonstrate that the magnetic field varies only slightly near z = 0.)
According to the formula, 2 moles of Co will magenetic produce 2 mole of CO2 and 1 mole of O2 prednisone will produce 2 moles of CO2. This is 602 for 1 mole. 0.5 mol of O2 is consumed. 0.344/2 = 0.172 mol
mol O2 is required, so O2 has a limiting reagent, so O2 mol has 0.172 mol, 0.344, therefore Co
: mol CO₂ production= 0.196 Particles
grams CO₂ production = 0.196 • Hook x 44.01 g CO₂ = 8.6259 g.Co₂
grams CO₂ 2.63 g = 863
5.50G 5.50G
MOL VON LA H 5,50 x I Mol 5,998 15.444
444 444
444
444
444
444
44
२८०२
mol CO = massmolar mass 5,50 g xX I mol
28-018 444 4 =4 mol 4
mols of la H 5.50 x × I mols
5.998 15.
0.344 mol. It represents the absolute or relative direction or magnitude that an object is moving in the sense of motion. Used to describe the size or extent of something. In physics, size generally refers to entities.
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Use the formula from the video to help you answer this question. Assume you are driving 20 mph on a straight road. Also, assume that at a speed of 20 miles per hour, it takes 100 feet to stop. If you were to increase your speed to 60 miles per hour, your stopping distance is now _____. Group of answer choices.
Answer: 900 feet
Explanation:Given Velocity (V₁)=20mph≈29.334 t/s
it take 100 feet to stop
Using Equation of motion
v²-u²=2as
where
v,u=Final and initial velocity
a=acceleration
s=distance moved
0-(29.334)²=2(-a) (100)
a=29.331²/2×100=1.302 t/s²
When velocity is 60 mph
v²-u²=2as
0-(88.002)²=2-(-4.302) (s)
s=900.08 feet
How do you calculate a distance's speed?Given a distance and the amount of time needed to travel that distance, an object's speed can be calculated using the speed formula. By substituting the known values in the formula for speed and further analyzing, we can also use the speed formula to compute the distance or time.
What are some intriguing issues that the speed formula can be used to solve?Let's use the speed formula to answer a few intriguing issues. Figure 1: In an hour, a train might go 120 kilometres. Using the speed formula, calculate the train's speed in m/s.
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