Which of the following is the chemical formula for an element?

Answer: Lets say he is traveling that speed per 5 second.

Average Speed= Total Velocity/Time

(10+20)/5

30/5

6

Explanation:

The electromagnetic field will become stronger. When the amount of current traveling through an electromagnet increases, the magnetic field around the magnet also increases, making it stronger.

An electromagnetic field is a physical field that is created by the presence of electrically charged particles. It is a type of field that is characterized by both electric and magnetic components, which oscillate together and propagate through space. Electromagnetic fields are responsible for the behavior of charged particles, such as electrons, protons, and ions, and they play a fundamental role in the functioning of many natural and man-made systems, including radio and television broadcasting, magnetic resonance imaging (MRI), and wireless communication. Electromagnetic fields can be generated by electric currents and changing magnetic fields, and they can be measured using instruments such as electric field meters and magnetic field sensors. Exposure to electromagnetic fields can have health effects on humans and other organisms, and this is an active area of research. The study of electromagnetic fields is an important field of physics, and it has many practical applications in fields such as engineering, medicine, and telecommunications.

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Answer: E) All of them

Explanation: A transparent or translucent material, such as window glass, transmits some or all of the light that strikes it. This means that the light passes through the material rather than being reflected by it.

*Please Mark me**

Common window glass, also known as clear or float glass, transmits all colors of light. The correct answer is (E) all of the above.

Common window glass, also known as clear or float glass, transmits all colors of light. It does not selectively absorb any specific color.

Therefore, when white light passes through window glass, it allows all colors—yellow, red, blue, and green—to be transmitted without significant distortion or absorption. This is why we perceive window glass as colorless or transparent.  The correct answer is (E) all of the above.

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To determine the specific heat of the metal and the amount of energy transferred to the water, we can apply the principle of energy conservation. By considering the heat gained by the water and the heat lost by the metal, we can solve for the specific heat of the metal and calculate the energy transferred.

(a) We can use the principle of energy conservation to determine the specific heat of the metal. The heat gained by the water is equal to the heat lost by the metal. We can express this as:

m_water * c_water * ΔT_water = m_metal * c_metal * ΔT_metal

where m_water and m_metal are the masses of the water and the metal ingot, c_water is the specific heat capacity of water, c_metal is the specific heat capacity of the metal (which we want to find), ΔT_water is the change in temperature of the water, and ΔT_metal is the change in temperature of the metal.

Substituting the given values, we have:

(0.400 kg) * (4186 J/kg·°C) * (22.4°C - 20.0°C) = (0.0500 kg) * c_metal * (22.4°C - 200.0°C)

Simplifying and solving for c_metal, we find:

c_metal ≈ 387 J/kg·°C

(b) The amount of energy transferred to the water as the ingot is cooled can be calculated using the formula:

Q = m_water * c_water * ΔT_water

where Q is the amount of energy transferred, m_water is the mass of the water, c_water is the specific heat capacity of water, and ΔT_water is the change in temperature of the water.

Substituting the given values, we have:

Q = (0.400 kg) * (4186 J/kg·°C) * (22.4°C - 20.0°C)

Calculating the value, we find:

Q ≈ 3352 J

Therefore, the amount of energy transferred to the water as the ingot is cooled is approximately 3352 Joules.

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As per the details given, Blaise ran a distance of 20 meters.  Stella and Aster will meet approximately 0.3056 mile east of the gazebo.

The Blaise run:

Let's assume the distance Blaise ran is "D" meters.

Isaac's speed = 2 m/s

Blaise's speed = 2 m/s / 2 = 1 m/s (half the speed of Isaac)

Time taken by Isaac = D / 2 m/s

Time taken by Blaise = D / 1 m/s = D

Total time taken by Isaac = 2 minutes * 60 seconds/minute + D / 2 m/s = 120 seconds + D / 2 seconds

110 seconds + D / 2 seconds = 120 seconds + D / 2 seconds

Now, we can solve for "D":

110 seconds = 120 seconds

120 seconds - 110 seconds = D / 2 seconds

D = 10 seconds * 2 m/s = 20 meters

So, Blaise ran a distance of 20 meters.

The place at Stella and Aster meet:

Stella's initial position = -1/4 mile (since she is 1/4 mile west of the gazebo)

Stella's speed = 1 m/s

Stella's position at time "t" = -1/4 mile + 1 m/s * t

Aster's initial position = 3/4 mile (since she is 3/4 mile east of the gazebo)

Aster's speed = 0.8 m/s

Aster's position at time "t" = 3/4 mile - 0.8 m/s * t

-1/4 mile + 1 m/s * t = 3/4 mile - 0.8 m/s * t

-1/4 mile + 1.8 m/s * t = 3/4 mile

1.8 m/s * t = 3/4 mile + 1/4 mile

1.8 m/s * t = 1 mile

t = 1 mile / 1.8 m/s ≈ 0.5556 hours

Now, let's find their meeting position:

Stella's position at time "t" = -1/4 mile + 1 m/s * t = -1/4 mile + 1 m/s * 0.5556 hours

Stella's position at time "t" ≈ 0.3056 mile

The distance did the car travel:

is "T" hours.

Average speed = 45 mi/hr

Total time taken = T hours

Time spent traveling = Total time taken - Rest stop time = T hours - 0.25 hours = T - 0.25 hours

Average speed = Distance traveled / Time spent traveling

45 mi/hr = D miles / (T - 0.25 hours)

60 mi/hr = D miles / Time spent traveling

45 = D / (T - 0.25)

60 = D / (T - 0.25)

D = 60 (T - 0.25)

45 = 60 (T - 0.25) / (T - 0.25)

45(T - 0.25) = 60(T - 0.25)

45T - 11.25 = 60T - 15

15T = 3.75

T = 3.75 / 15

T = 0.25 hours

Substituting:

D = 60 (0.25 - 0.25)

D = 0 miles

Therefore, the distance traveled by the car is 0 miles, and the trip took 0.25 hours (15 minutes).

The time elapses:

First, let's find the distance biker B travels in 3 seconds:

Distance traveled by biker B = Speed * Time = 5 m/s * 3 s = 15 m

Since biker A starts accelerating after 3 seconds, the relative speed between biker A and biker B is the difference between their speeds:

Relative speed = Biker B's speed - Biker A's speed = 5 m/s - 0 m/s = 5 m/s

Distance = Initial velocity * Time + (1/2) * Acceleration * Time²

We know the initial velocity is 0 m/s (as biker A was initially stationary), the acceleration is 2 m/s² (biker A's acceleration toward biker B), and the distance is 15 m:

15 m = 0 m/s * Time + (1/2) * 2 m/s² * Time²

Rearranging the equation:

2 m/s² * Time² = 15 m

Time² = 15 m / (2 m/s²) = 7.5 s²

Taking the square root of both sides:

Time = √(7.5 s²) ≈ 2.74 s

Therefore, it takes approximately 2.74 seconds for biker A and biker B to meet.

To find the distance they travel before meeting, we can substitute this time

into the equation for distance traveled by biker A:

Distance = Initial velocity * Time + (1/2) * Acceleration * Time²

Distance = 0 m/s * 2.74 s + (1/2) * 2 m/s² * (2.74 s)²

Distance ≈ 0 + 2.74 m

Distance ≈ 2.74 m

Therefore, biker A and biker B travel approximately 2.74 meters before meeting.

The two balls be when they are at the same height:

Let's consider the motion of the two balls.

For the first ball thrown upward, its initial velocity is 25 m/s. The acceleration due to gravity is approximately 9.8 m/s². The height from which it was thrown is 15 m.

Using the equation for vertical motion:

h = h0 + v0t - (1/2)gt²

Where:

h = height

h0 = initial height

v0 = initial velocity

g = acceleration due to gravity

t = time

For the second ball dropped from rest, its initial velocity is 0 m/s. The initial height is 15 m.

Setting the heights of both balls equal to each other, we can solve for the time when they are at the same height:

h1 = h2

15 m + 25 m/s * t - (1/2) * 9.8 m/s² * t² = 15 m

25 m/s * t - (1/2) * 9.8 m/s² * t² = 0

Simplifying:

-4.9 m/s² * t² + 25 m/s * t = 0

Factorizing:

t * (-4.9 m/s² * t + 25 m/s) = 0

t = 0 (ignored since it represents the initial time when the balls were not at the same height)

-4.9 m/s² * t + 25 m/s = 0

4.9 m/s² * t = 25 m/s

t = 25 m/s / 4.9 m/s² ≈ 5.102 seconds

Now, we can find the height at this time using either ball's motion equation:

h = h0 + v0t - (1/2)gt²

Using the equation for the first ball:

h = 15 m + 25 m/s * 5.102 s - (1/2) * 9.8 m/s² * (5.102 s)²

h ≈ 15 m + 127.55 m - (1/2) * 9.8 m/s² * 26.032 m²

h ≈ 15 m + 127.55 m - 127.55 m

h ≈ 15 m

Thus, when the two balls are at the same height, they are 15 meters above the ground.

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The first step is to find the frequency heard by each aircraft as they approach each other. Let's call the frequency heard by each aircraft.

According to the Doppler effect formula for sound, the frequency heard by an observer moving towards a stationary source is given by:

f' = (v + vs) / (v + vd) * f

where f is the emitted frequency, v is the speed of sound, vs is the speed of the source (aircraft in this case), and vd is the speed of the observer (also an aircraft in this case).

Since both aircraft are approaching each other at the same speed, we can assume that their speeds are equal and call it v_a. Therefore, we have:

f' = (v + v_a) / (v - v_a) * f

We are given that the frequency heard by each aircraft is 2 times the emitted frequency, so we can write:

2f = (v + v_a) / (v - v_a) * f

Simplifying this equation, we get:

2 = (v + v_a) / (v - v_a)

2(v - v_a) = v + v_a

v = 3v_a

Now we can substitute this value of v into the speed of sound formula to get the speed of each aircraft:

343 m/s = (3v_a + v_a)

v_a = 343 / 4 = 85.75 m/s

Finally, we can convert this speed to km/hr:

85.75 m/s * 60 s/min * 60 min/hr / 1000 m/km = 308.7 km/hr

Therefore, each aircraft must have a speed of approximately 308.7 km/hr in order for the pitch they both hear to be 2 times the emitted frequency.

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The following statement about brown dwarfs that is not true is: "They emit light in the visible part of the spectrum." Brown dwarfs are celestial objects that are not massive enough to sustain hydrogen fusion in their cores and, thus, are unable to shine like true stars.

They are classified as intermediate between the smallest stars and the largest gas giant planets. Brown dwarfs emit most of their light in the infrared part of the spectrum. They also emit some light in the ultraviolet part of the spectrum.

Brown dwarfs are typically around 13 to 80 times the mass of Jupiter, or around 0.012 to 0.08 times the mass of the Sun. They are known as failed stars as they do not have enough mass for nuclear fusion to occur. They have a core temperature of around 2,500 K. While they are not visible to the eye, they can be detected through the use of telescopes that can detect infrared radiation.

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To determine the minimum speed of an incident electron that could produce a specific emission line, we need to use the expression for relativistic kinetic energy.

The expression for relativistic kinetic energy is given by:

KE = (γ - 1) * mc^2

Where:
KE is the kinetic energy of the electron
γ is the Lorentz factor, which is given by γ = 1 / sqrt(1 - v^2/c^2)
m is the rest mass of the electron
c is the speed of light in a vacuum
v is the velocity of the electron

Since we are looking for the minimum speed, we need to find the velocity (v) that corresponds to a specific energy level.

First, we need to know the rest mass of the electron, which is approximately 9.10938356 x 10^-31 kilograms.

Next, we need to know the emission line that we are considering. Once we have this information, we can determine the energy level associated with that emission line.

Finally, we can substitute the values into the equation and solve for v.

It is important to note that the value of the speed of light in a vacuum is approximately 3 x 10^8 meters per second.

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Distance between the nodal planes is 2.4m and If the standing wave pattern is in its eighth harmonic, cavity is 9.6m long.

Electromagnetic waves are waves that are created as a result of vibrations between electric and a magnetic field.

We know that ;

f= c/λ

f is frequency

c= Speed of light and V is wavelength

the wavelength is equal to,

λ= 2L/n

L is Length and n is Number of antinodes/nodes

A) Given, frequency= 125MHz, therefore

λ = c/f

λ =3 * 10⁸/125 *10⁶

=2.4 m

Distance between the nodal planes is 2.4m.

B) 8th harmonic given, so n= 8

L= ( λ * n)/2

= 2.4 * 8/2

L = 9.6 m

If the standing wave pattern is in its eighth harmonic, cavity is 9.6m long.

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La situación planteada se muestra a continuación:

(El diagrama mostrado es para la caja inferior). A continuación mostramos el diagrama para la caja superior:

Si consideramos el sistema de dos cajas como uno solo tenemos el siguiente sistemas de ecuaciones:

De donde:

Ahora debemos determinar si la caja de arriba no se resbala al aplicar esta fuerza, para esto debemos recordar que la fricción es máxima con el coeficiente de fricción estático.

Entonces tenemos que la fricción es máxima para el bloque de arriba cuando:

Dado que la fuerza que debemos aplicar no es mayor a la fricción máxima concluimos que ambas cajas bajaran al mismo tiempo. Por lo tanto la fuerza que debemos aplicar es de 188.5 N.

The correct statement that explains the observation using Newton's laws is objects at rest tend to remain in their current state of motion unless acted upon by an unbalanced force, but objects in motion require a continual application of force to stay in motion. Here option A is correct.

According to Newton's first law of motion, an object will continue moving at a constant velocity in a straight line unless acted upon by an external force. In this case, when the cannonball is shot horizontally from the cannon, it initially possesses a forward velocity due to the force applied by the cannon. However, once the cannonball is in motion, the only forces acting on it are gravity and friction.

Gravity acts vertically downward, causing the cannonball to accelerate downward. Friction acts horizontally in the opposite direction to the motion of the cannonball. As the cannonball moves forward, friction opposes its motion and gradually slows it down.

Since there is no force continuously propelling the cannonball forward, and the forces of friction and gravity act on it, the cannonball eventually comes to a stop and falls to the ground. Hence option A is correct.

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Since the acceleration of gravity can be considered a constant for this situation the below formulas can be derived:

The acceleration due to gravity value of 9.8 m/\(s^2\) means that the velocity of a body falling freely changes by 9.8 m/s every second.

(a) acceleration = g = constant = -9.81 m/\(s^2\) dv/dt

(b) velocity =\(V_0\) -gt = ds/dt

(c) Position s=\(s_0\)+\(V_0\)t -1/2g\(t^2\)

a) Therefore in this problem \(s_0\)= 450 m and \(V_0\) = 0, s(t) = 450 -1/2g\(t^2\)

b) The time to reach the ground is found by solving the position equation for s=0 yielding 9.58 sec

c) The impact velocity is found by solving 2) for t= 9.58 sec yielding -94 m/s ( neg means down).

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The specific heat capacity of the substance is 444 J/kg.°C.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C).

To calculate the specific heat capacity of the substance, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the specific heat capacity is 444 J/kg.°C.

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Answer:

Mercury is the answer..

Answer:

I believe mercury

Explanation:

Answer:

One would need to know how far apart the towns are:

T = SA / 40      time it takes for first cyclist to travel S1

T = SB / 60       time it takes for cyclist B to travel distance S2

SA + SB = S     the distance between the towns

SB = 60 / 40 SA = 1.5 SA

SA + 1.5 SA = S

S = 2.5 SA where cyclist travels distance SA

The time will depend on the separation of the towns.

Answer:

metal

solid

Explanation:

The velocity of the child is 3.36 m/s. Then, the distance it covered is 14 meters. The radius from the centre is then, 2.24 m.

Centripetal acceleration is the acceleration of a body moving through a circular paths. It is the rate of change of its angular velocity.

The acceleration of the child = 0.80 ms/²

time  = 4.2 s

velocity = time interval × acceleration

             = 4.2 s ×  0.80 ms/²= 3.36 m/s.

Then the distance covered  = velocity × time

= 3.36 m/s × 4.2 = 14.22 m.

This is the circumference of the circular path which is equal to 2πR.

The distance from the centre = radius of the path.

2πR = 14.22 m

R = 2.24 m

Therefore, the child will be 2.24 m far from the center of the ride.

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Answer: 5 m/s North

Explanation:

Velocity = Momentum/Mass

Velocity = 225 kg*m/s/45kg

Velocity = 5 m/s North

The kinetic energy of the truck is approximately 1,964,180 Joules. The kinetic energy of the car is approximately 250,003 Joules.

To calculate the kinetic energy of each vehicle, use the formula:

Kinetic Energy (KE) = 1/2 × mass × velocity²

Given the mass and velocity of each vehicle, plug in the values and calculate the kinetic energy.

For the truck:

Mass = 6,000 kg

Velocity = 92 km/h

= 92,000 m/3600 s

≈ 25.56 m/s

Using the formula:

KE = 1/2 × 6,000 kg × (25.56 m/s)²

Calculating the result:

KE = 1/2 × 6,000 kg × 655.3936 m²/s²

KE ≈ 1,964,180 Joules

Therefore, the kinetic energy of the truck is approximately 1,964,180 Joules.

For the car:

Mass = 1,200 kg

Velocity = 100 km/h

= 100,000 m/3600 s

≈ 27.78 m/s

Using the formula:

KE = 1/2 × 1,200 kg × (27.78 m/s)²

Calculating the result:

KE = 1/2 × 1,200 kg × 771.6884 m²/s²

KE ≈ 250,003 Joules

Therefore, the kinetic energy of the car is approximately 250,003 Joules.

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The given statement is false, because doubling the number of units of a bottleneck resource does not necessarily double the process capacity.

The capacity of a process is determined by its bottleneck, which is the resource or step with the lowest capacity. Increasing the capacity of the bottleneck resource may improve the overall process capacity, but it depends on the specific circumstances and the nature of the process. Other factors such as dependencies, synchronization, and overall process design can also impact the process capacity. Therefore, simply doubling the units of a bottleneck resource does not guarantee a doubling of the process capacity.

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lan can decrease the magnetic force on the washers by increasing the distance between the magnet and the pile of metal washers.

A material or object that creates a magnetic field is called a magnet.

The most noteworthy characteristic of a magnet, a force that pulls on other ferromagnetic elements like iron, steel, nickel, cobalt, etc., as well as the ability to attract or repel other magnets, is caused by this invisible magnetic field.

The strength of the magnetic force produced by a magnet increases when the distance between the magnet and an object experiencing the magnetic force is reduced.

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The players responsible for covering a blocked ball in a 5-ball set to the right side are middle back and right front.

In a 5-ball set, the positioning of players is crucial to ensure effective coverage and defense. When a ball is blocked by the opposing team, it is important to have players strategically positioned to cover the blocked ball and maintain control of the play. The middle back player, positioned in the back row, provides coverage and support from the backcourt. They are responsible for anticipating and reacting to blocked balls, making defensive plays, and setting up offensive opportunities. The right front player, positioned in the front row on the right side, is responsible for covering the frontcourt area near the net. They assist in blocking, defending against attacks, and transitioning to offensive plays. By having the middle back and right front players working together, the team can effectively cover the blocked ball and maintain control of the game.

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The power wasted in heating the cables of total resistance 9.0 Ω  is 74365290000 W.

Electric power is the rate at which work is done or energy is transformed into an electrical circuit.

To calculate the electric power wasted in heating the wire, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the power wasted is 74365290000 W.

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To determine the rate of seafloor spreading at point Z, we need to use the ages of the seafloor on either side of the point and calculate the distance between them.

Let's assume that the seafloor on one side of point Z is X million years old, and on the other side, it is Y million years old. The difference in ages will give us the time span over which the seafloor has been spreading.

Now, we need to calculate the distance between the two points on the seafloor. You mentioned that point Z is 800 kilometers from the crest of the mid-ocean ridge.

Using the calculated time span and the distance between the points, we can determine the rate of seafloor spreading. This can be done by dividing the distance by the time span.

However, since you haven't provided specific age values or additional information, I am unable to perform the calculation in this context. If you can provide the ages of the seafloor on either side of point Z, I can help you determine the rate of seafloor spreading.

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Answer:v

Both prokaryotic and eukaryotic cells have similar features, like ribosomes, genetic material, a cytoplasm, and plasma membranes. There are two primary types of eukaryotic cells: animal and plant cells.

Explanation:

Answer:

18

Explanation:

12 - 5 + 8 = 15

12 - 8 = 4

7 - 4 = 3

15 + 3 = 18

According to the fission scenario, Earth had been spinning so fast that some material broke away and began to orbit the planet. What is most widely accepted today is the giant-impact theory. It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars.

What is giant impact theory?

The Giant Impact Hypothesis, sometimes called the Big Splash or Theia Impact, is about 4.5 billion years ago, during the Hadean Era (about 20 to 100 million years after the solar system merged). The colliding object is sometimes called Theia, after the name of the mythical Greek giant who was the mother of the moon goddess Selene. An analysis of lunar rocks published in the A 2016 report suggests that the impact may have been a direct hit, resulting in a complete mingling of both parents.

Thus, According to the fission scenario, Earth had been spinning so fast that some material broke away and began to orbit the planet. What is most widely accepted today is the giant-impact theory. It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars.

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Answer: Tilt of earths axis and seasons. makes sense to me.

a) The angular momentum of the yo-yo about its center-of-mass as a function of time is given by:

L(t) = (1/2 * M * R * g * t)

b) The tension in the string as a function of time is given by:

T(t) = \(M * (g * t)^2 / R\)

a) The angular momentum of the yo-yo about its center-of-mass can be determined as a function of time by considering the conservation of angular momentum.

Angular momentum (L) is given by the product of moment of inertia (I) and angular velocity (ω):

L = Iω

The moment of inertia of the yo-yo about its center is 1/2 MR^2, and since the yo-yo is falling vertically, the angular velocity can be expressed as:

ω = (dθ/dt)

where θ is the angle of rotation.

Therefore, the angular momentum as a function of time is:

L(t) = (1/2 \(MR^2\))(dθ/dt)

b) The tension in the string can be determined as a function of time by considering the forces acting on the yo-yo.

At any given time, the tension in the string (T) is equal to the net force acting on the yo-yo in the radial direction. This net force is given by the difference between the gravitational force (mg) and the centripetal force (Fc).

The gravitational force is given by mg, where m is the mass of the yo-yo.

The centripetal force is given by Fc = (Mω^2)(Ro), where M is the mass of the yo-yo and Ro is the radius of the axle.

Therefore, the tension in the string as a function of time is:

T(t) = mg - (Mω^2)(Ro)

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One may calculate the spreading rate on one side of a mid-ocean ridge by dividing the distance by the time (Distance/Time = Rate). This is known as a half-spreading rate. Multiply it by two to get the spreading rate in its entirety on both sides of the ridge.

It spreads 2 to 5 cm (8 to 2 inches) every year and forms an ocean trench about the size of the Grand Canyon. The East Pacific Rise, on the other hand, is a core that is quickly expanding. It spreads by around 6 to 16 cm per year (3-6 inches).

Seafloor spread occurs at mid-ocean ridges, where new oceanic crust is produced by volcanic activity and then gradually moves away from the ridge.

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