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continents of the Earth have gone through major shifts approximately 8.76 times in the 4.6 billion year history of the planet.

the number of major shifts that have occurred in the 4.6 billion year history of the Earth, we can divide the total time by the average time between shifts:

Number of shifts = Total time / Average time between shifts

the given values, we get:

Number of shifts = 4.6 billion years / 525 million years per shift

To simplify the calculation, we can convert both values to the same units, such as years.

1 billion years = 1,000,000,000 years

Therefore, 4.6 billion years = 4.6 × 1,000,000,000 years = 4,600,000,000 years

525 million years = 525 × 1,000,000 years = 525,000,000 years

these values, we get:

Number of shifts = 4,600,000,000 years / 525,000,000 years per shift

Simplifying this expression gives:

Number of shifts = 8.7

The movement of the continents of the Earth with respect to one another is known as continental drift and is a geological process. The mantle layer is topped by a number of massive plates that make up the Earth's crust. The continents shift and move over time as a result of these plates' movement on the Earth's surface. Convection currents in the mantle layer underneath are what move these plates.

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Answer: Plate tectonics allow scientists to explain many _observations_______ and to ___predict_____ geologic events.

Explanation:

observations, predict

The balanced equation for the given unbalanced chemical reaction is:

\(C_3H_6O_2 +\frac{7}{2} O_2 \longrightarrow 3CO_2 +3H_2O\)

A chemical equation can be defined as a representation of a chemical reaction in which symbols of the substances, participated reactants, formed products, and an arrow showing the direction of the reaction is involved.

A balanced equation in which the number of atoms of each element reactants and products is equal in the equation of a chemical equation.

The law of conservation of mass should be obeyed while balancing a chemical equation. The total mass present on the reactant side should be equal to the total mass on the product side in a balanced chemical equation.

The balanced chemical equation for a given reaction is:

\(C_3H_6O_2 +\frac{7}{2} O_2 \longrightarrow 3CO_2 +3H_2O\)

Therefore, missing coefficients O₂, CO₂ and H₂O are 7/2, 3 and 3 respectively.

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Answer:

\(0.15\: \mathrm{Hz}\)

Explanation:

The frequency is of an object is given by \(f=\frac{1}{T}\), where \(T\) is the orbital period of the object.

Since the racecar makes 24 revolutions around a circular track in 162 seconds, it will take the racecar \(\frac{162}{24}=6.75\:\mathrm{s}\) per revolution.

Therefore, the frequency of the racecar is \(\frac{1}{6.75}=\fbox{$0.15\:\mathrm{Hz}$}\) (two significant figures).

The radius of the track is irrelevant in this problem.

The time taken up to which the stone will be in the  air is 4.01 seconds.

Here we are dealing with free falling which is referred to as A free falling object is an object that's falling beneath the sole impact of gravity. Any object that's being acted upon as it were by the force of gravity is said to be in a state of free fall. As we are given the velocity which is 19.6 m/s and the height which is 59.4 m.

So the in the first case when the stone travels for a certain distance until its velocity becomes zero.

The formula we are referring to for calculating the maximum height which is v² = u² - 2gh , where v is the final velocity , u is the intial velocity  ,g is the acceleration due to gravity and  h is the height.

So at  v=0

=> h=  u²/2g

=> h = (19.6)2/( 2*9.8)= 19.6 m

Whereas when the stone starts to freely fall, so  

h = 1/2*gt², here the time taken will be, t = √(2h/g)

where h = sum of the height of the building and the height traveled after the throw

which is 19.6 m+59.4 =79

So , t = √(2h/g)

=>t = √2*(79) /9.8 = 4.01 second

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Answer:

219 m/s

Explanation:

Kinetic energy is calculated using the formula:

Given:

We can solve for the unknown variable v.

Substitute these known values into the formula.

The velocity of the car is around 219 m/s.

Answer:

1_95km/h,2_40km/h

Explanation:

formula-speed_distance/time

Answer:

I said that setting enriches the characters. What I didn’t tell you is that it helps to form the characters. It does the same for the plot.

Explanation:

Answer:

A is the answer

Explanation:

Because the first law of thermodynamics states that energy can niether be created nor destroyed...

The relationship between the temperature of an object and the frequency of electromagnetic waves generated by the object is described by the concept of blackbody radiation.

A blackbody is an idealized object that perfectly absorbs all electromagnetic radiation that falls on it and emits radiation in a continuous spectrum over a range of frequencies.

According to Planck's law, the spectral distribution of blackbody radiation depends on the temperature of the object. As the temperature of the object increases, the peak of the spectral distribution shifts towards higher frequencies.

This relationship is known as Wien's displacement law, which states that the wavelength at which the spectral radiance of a blackbody is maximum is inversely proportional to the temperature of the object.

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The average velocity of the car over the first second is -50 m/s.

The first option is correct.

Average velocity is the ratio of the displacement to the time interval.

The formula to calculate the average velocity is as follows;

where;

Displacement is the change in distance or position in a specified direction.

That is the difference between the final and initial distances.

Considering the graph of the automobile brake test given in the attachment;

displacement over the first second = 50 - 100 m

displacement over the first second = -50 ms

Average velocity = -50 m/ 1 s

Average velocity = -50 m/s

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The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

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Answer:

The final velocity of the 2kg ball is 1.270 m/s

Explanation:

According to Newton's second and third laws of motion

Newton's second law state that "the rate of change of momentum is proportional to the applied force and takes place in the direction of that force".

Newton's third law state that "for every action, there must be an equal and opposite reaction".

The combinations of these two laws resulted in an elastic collision

Given that:

m1 = 2kg

u1 = 2.20m/s

m2 = 4.00kg

u2 = 0m/s

An Elastic collision is when kinetic energy before = kinetic energy after

E.K before = \(1/2mv^{2}\)

E.K before = 1/2 * 2 * (2.20)^2

E.K = 1/2 * 2 * 4.84

E.K before = 4.84j

E.K after = 1/2 x (4 + 2)v^2

E.K after = 1/2(6v^2)

E.K after = 3v^2

Since E.K before = E.K after

4.84 = 3v^2

Divide through by 3

4.84/3 = 3v^2/3

1.6133 = v^2

\(V = \sqrt{1.6133} \\V = 1.270 m/s\)

Answer:

A

Explanation:

Finding Gravitational Potential Energy :

GPE = mass x gravitational acceleration x height

Finding Kinetic Energy :

KE = 1/2 x mass x (velocity)²

Hence, option A is correct.

parameters given are:

time= 8.2 seconds

g(acceleration due to gravity)= \(9.8 m/s{2}\)

(a) skydivers downward velocity is given as

Vf = Vo + g(t)

Vf= 0 + 9.8 + (8.2)

Vf= \(80.36 m/s^{2}\)

(b) distance of the skydiver below the helicopter

h= Vo + 1/2 gt^2

h= 0 + (0.5) *(9.8) * (8.2)^2

h= 0.5* 9.8 * 67.24

h= 329.48m

What is Velocity?

Velocity is the rate at which an object changes its direction.

The skydivers downward velocity is 80.36m/s^2

The distance form the skydiver to the helicopter is 329.48 meters

In conclusion, initial velocity in the given question is equal to zero.

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We are given that a force of 24N is exerted on an object to lift it a distance of 2.24m. To determine the work done we will use the following formula:

Where:

Substituting the values we get:

Solving the operations:

Therefore, the work done is 53.76 Joules.

Let's determine how light travels.

It can be said that light travels in straight lines primarily because there is less diffraction in light.

Diffraction of light occurs when a light wave passes through an open slit that is approximately the size or smaller than the light' wavelength.

Also, as light travels in waves but these waves are called straight lines.

We can also say that straight lines in which light travels are called rays.

Light changes direction when it comes across objects like mirrors, or when it passes from one object to another.

Therefore, the correct answer can be said to be All of the sections.

ANSWER:

All of the sections.

Answer:

Charged

Explanation:

When an atoms loses or gains electrons they become charged(ion)

When an atom loses electrons it becomes positively charged and it is called a Cation

When an atom gains electrons it becomes negatively charged and it is called an Anion

The sled's speed can be calculated by considering the acceleration, frictional force, and time. After substituting the given values and performing the calculations, the final speed is determined to be 12.25 m/s.

To calculate the speed of the sled after 2.50 seconds, we can use the equations of motion and consider the forces acting on the sled.

Let's denote the initial speed of the sled as v0, the final speed as vf, the acceleration as a, the time as t, and the coefficient of friction as μ.

Initially, the rocket sled is accelerating, so we can use the equation:

vf = v0 + at

Since the sled is skidding along its rails after the rocket engine stops, the only horizontal force acting on the sled is the force of friction. The frictional force can be calculated using the equation:

frictional force = coefficient of friction * normal force

Since the sled is moving horizontally, the normal force is equal to the weight of the sled, which can be calculated as:

weight = mass * gravity

Now, we can determine the acceleration of the sled using Newton's second law:

frictional force = mass * acceleration

Combining the equations and substituting the values, we have:

vf = v0 + (frictional force / mass) * t

To find the frictional force, we need to calculate the weight of the sled and then multiply it by the coefficient of friction:

frictional force = (mass * gravity) * coefficient of friction

Substituting this back into the previous equation, we get:

vf = v0 + ((mass * gravity * coefficient of friction) / mass) * t

Simplifying further, we have:

vf = v0 + (gravity * coefficient of friction) * t

Now we can substitute the given values into the equation. Assuming the acceleration due to gravity is approximately 9.8 m/s², the coefficient of friction is 0.5, the initial speed is 0 m/s (since the sled starts from rest), and the time is 2.50 s, we can calculate the final speed:

vf = 0 + (9.8 * 0.5) * 2.50

vf = 12.25 m/s

Therefore, the sled is moving at a speed of 12.25 m/s after 2.50 seconds.

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Ensure that the graph has a title that accurately describes the presentation's subject. The measuring unit should be mentioned in the graph. The right scale must be chosen in order to accurately represent the facts.

Similar-direction vectors are referred to as like vectors. Contrarily, vectors that point in the opposite direction from one another are said to be unlike vectors.

Therefore, arrows can be used to graphically represent vectors.The arrow's length provides a measure of the vector's magnitude.The vector's direction is indicated by the direction of the arrow.

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A wave is a disturbance in a medium or a field that carries energy without a net displacement of the particles that make up the medium.

The wave oscillates back and forth certain amount of times each time unit, that amount of times is called the frequency of the wave. On the other hand, the period of a wave is the time that it takes for the wave to oscillate back and forth one time. The period T and the frequency f are related through the formula:

The maximum displacement of the medium with respect to the equilibrium position is called the amplitude of the wave, and the distance where one complete oscillation can fit is called the wavelength of the wave.

The frequency f and the wavelength λ of a wave a related through the equation:

Where v is the speed of the wave.

Two kinds of waves are longitudinal and transverse waves.

In a longitudinal wave, the oscillations in the medium wave the same direction as the propagation of the wave. Two examples of longitudinal waves are a wave traveling along a spring and sound waves.

In a transverse wave, the oscillations in the medium are perpendicular to the direction in which the wave propagates. Two examples of transverse waves are a wave traveling through a string and electromagnetic radiation.

The distance traveled by the person to come to a complete stop in 38 ms at a constant acceleration of 60 g is approximately 273.42 meters.

The distance that a person covers to come to a complete stop in 38 ms at a constant acceleration of 60 g can be calculated using the kinematic equation.

The formula is given by, d = (v^2 - u^2) / 2a, where d is the distance traveled, v is the final velocity, u is the initial velocity, and a is the acceleration given in g units.

To solve the problem, we need to first convert the acceleration given in g units to meters per second squared (m/s²). We know that 1 g is equivalent to 9.8 m/s².

Hence, 60 g is equivalent to 60 × 9.8 m/s² = 588 m/s².

Substituting the values in the above formula, we get,d = (0 - u^2) / 2a= u^2 / 2a, since the final velocity is 0 when the person comes to a complete stop= u^2 / 2 × 588= u^2 / 1176 m

The time taken, t = 38 ms = 0.038 s.

Now, we know that acceleration, a = (v - u) / t.

We can rearrange the above equation to find the final velocity, v. We get,v = u + at

Substituting the values, we get,588 = u + (588 × 0.038)u = 588 - (588 × 0.038)u = 567.816 m/s

Using the value of u, we can now find the distance traveled using the kinematic equation as, d = u^2 / 1176= (567.816)^2 / 1176≈ 273.42 m.

Therefore, the distance traveled by the person to come to a complete stop in 38 ms at a constant acceleration of 60 g is approximately 273.42 meters.

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Answer:

As traditionally used, impairment refers to a problem with a structure or organ of the body; disability is a functional limitation with regard to a particular activity; and handicap refers to a disadvantage in filling a role in life relative to a peer group.

Explanation:

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