1)Depending on the amount of water in the lake, the salinity of an ocean is 34.5 0/00, If this were the case, 1000g of this would consist of____ grams of water and ____grams of salt.

2)Describe how salinity and temperature effect the density of sea water:

The general formula for acceleration is:

[tex]a = (v_f - v_i) / t[/tex]

where a is the acceleration, [tex]v_f[/tex]  is the final velocity[tex], v_i[/tex] is the initial velocity, and t is the time interval during which the change in velocity occurs.

Acceleration is the rate of change of an object's velocity over time. It is a vector quantity that is defined as the change in velocity divided by the time interval during which the change occurs. Acceleration can be positive, negative, or zero, and it is measured in units of meters per second squared [tex](m/s^2).[/tex]

To find the time that has passed given the acceleration formula, we would need to rearrange the formula to solve for time "t" in terms of the other variables. For example, if we know the initial velocity, final velocity, and acceleration, we can use the formula to find the time interval during which the velocity changes.

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The maximum length of runway needed and tension in the towrope will be 175.05 m and 5999N.

For solving this question we will use the laws of Kinematics as well as the Newton's Laws of Motion. According to the third law of Kinematics

v² = u² + 2aS ; where v is the final velocity, u is the initial velocity, a is the acceleration and S is the displacement.

According to Newton's Laws of Motion we know that the net force is equal to product of mass and acceleration that is

F = ma ; where F is net force, m is mass of the body and a is the acceleration.

Now, form the free body diagram of the gliders, we balance the forces by Newton's law of motion as:

For glider 1 the forces in x axis will be:

T₁ - T₂ - f = ma                                                    ......(1)

where T₁ and T₂ are tensions on glider 1 and 2 respectively and f is the frictional force.

In y axis the forces will be:

N₁ - W = 0 ; where N₁ is the normal on first glider and W is the weight due to gravity.

For glider 2 the forces in x axis will be:

T₂ - f = ma                                                           ......(2)

where T₂ is tensions on glider 2 and f is the frictional force.

In y axis the forces will be:

N₂ - W = 0 ; where N₂ is the normal on second glider and W is the weight due to gravity.

From equation (1) and (2) we get

T₁ - 2f = 2ma

a = T₁ - 2f/2m

a = 12000 - 2(2800)/2(700)

a = 6400/1400

a = 4.57 m/s²

Now from laws of Kinematics we have

v² = u² + 2aS; here the initial velocity is zero so u = 0 and v = 40 m/s

(40)² = 0 + 2 × 4.57 × S

S = 1600/9.14

S = 175.05 m

Now for the tension in the second rope of glider we use equation (2) that is

T₂ - f = ma

T₂ = ma + f

T₂ = 700 × 4.57 + 2800

T₂ = 3199 + 2800

T₂ = 5999 N

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Answer:

  2.32 m/s

Explanation:

If an 8.90 kg block of ice slides down a 1.15 m frictionless ramp to reach a speed of 2.87 m/s, you want to know its final speed if there were friction opposing the motion with a force of 11.0 N.

The kinetic energy at the bottom of the frictionless ramp is ...

  KE = 1/2mv²

  KE = 1/2(8.90 kg)(2.87 m/s)² = 36.654205 J

When friction is introduced, the work done to oppose the friction is ...

  W = Fd

  W = (11 N)(1.15 m) = 12.65 J

Hence the remaining energy of the block at the bottom of the ramp with friction is ...

  KE' = 36.654205 -12.65 J = 24.004205 J

This corresponds to a speed of ...

  v = √(2·KE/m) = √(2·24.004205/8.9) ≈ 2.32 . . . . m/s

The speed at the bottom of the ramp with friction is about 2.32 m/s.

__

Additional comment

We can find the slope of the ramp by equating the ending kinetic energy to the beginning potential energy. As you can see, that is not relevant to the problem, since the opposing force is parallel to the ramp.

A single photon of violet color has the greatest amount of energy among the visible colors of the electromagnetic spectrum. This is because violet light has the shortest wavelength and the highest frequency among the visible colors.

According to the equation E = hf, where E is the energy of a photon, h is Planck's constant, and f is the frequency of the radiation ,Because the wavelengths of electromagnetic radiation are inversely proportional to their frequencies, according to the equation c = λf, where c is the speed of light, λ is the wavelength of the radiation, and f is its frequency. Therefore, photons of violet light, having the highest frequency, also have the highest energy.

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A. The magnitude of C can be determined.
D. The magnitude of C is between 1m and 10m.

When two vectors are added, the magnitude of the resulting vector can be found using the law of cosines. For the vectors A and B, the magnitude of their sum C is given by:
|C|² = |A|² + |B|² + 2|A||B|cosθ,

where θ is the angle between the vectors A and B. Since the directions of A and B are unknown, θ could take any value between 0 and 180 degrees. However, the minimum value of cosθ is -1, which occurs when θ = 180 degrees. Therefore, the minimum magnitude of C is:

|C|min = |A| - |B| = 1 m - 10 m = 9 m.

The maximum value of cosθ is 1, which occurs when θ = 0 degrees. Therefore, the maximum magnitude of C is:

|C|max = |A| + |B| = 1 m + 10 m = 11 m.

Therefore, the magnitude of C is between 1m and 10m, and it can be determined.

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correct question

Which of the following statements are true about the magnitude of the vector C, which is defined as the sum of two given vectors A and B with magnitudes 1m and 10m respectively, but unknown directions? (Choose all that apply.)

A. The magnitude of C can be determined.
B. The magnitude of C is less than 10m.
C. The magnitude of C is less than 1m.
D. The magnitude of C is between 1m and 10m.
E. The magnitude of C is greater than 11m.

 (c) n=3,1=2,m=1,s=+1/2 this set of quantum number represents the highest energy of atom

Correct option is C)

The sets of the quantum numbers and the corresponding orbitals are as shown below.

a)n=3,l=0 means 3s− orbital

b)n=3,l=1 means 3p− orbital

c)n=4,l=2 means 4d− orbital

d)n=4,l=0 means 4s− orbital

Increasing order of energy among three orbitals is 3s<3p<4s<4d

∴4d has highest energy.

Hence, the set c of quantum numbers (n=4,l=2,m=1,s=+1/2)  represents the highest energy of an atom.

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The calculations in SI base units of 40 × 107 nm - 4 MJ dm will be [tex]13 X 10^1^5 W[/tex].

The present version of the metric system is called the International System of Units, also referred to as the SI system and abbreviated SI in all languages.

To convert the first quantity, 40 × 107 nm, to SI base units, we need to express it in meters (m).

Since 1 nm = [tex]10^{-9}[/tex] m, we can multiply 40 × 107 nm by [tex]10^{-9}[/tex] to obtain:

40 × 107 nm * [tex]10^{-9}[/tex] m/nm = 40 × 107 * [tex]10^{-9}[/tex] m = 4 × [tex]10^{-2}[/tex] m

Next, to convert the second quantity, 4 MJ, to SI base units, we need to express it in joules (J). Since 1 MJ = [tex]10^{6}[/tex] J, we can multiply 4 MJ by [tex]10^{6}[/tex] to obtain:

4 MJ x [tex]10^{6}[/tex] J/MJ = 4 x [tex]10^{6}[/tex] J = 4 × [tex]10^{6}[/tex] J

So, the expression 40 × 107 nm - 4 MJ can be expressed in SI base units as:

4 ×[tex]10^{-2}[/tex] m - 4 × [tex]10^{6}[/tex] J

To convert the first quantity, 13 PW, to SI base units, we need to express it in watts (W). Since 1 PW = [tex]10^{15}[/tex] W, we can multiply 13 PW by [tex]10^{15}[/tex] to obtain:

13 PW x [tex]10^{15}[/tex] W/PW = 13 x [tex]10^{15}[/tex] W = 13 × [tex]10^{15}[/tex] W

Next, to convert the second quantity, 3 ns, to SI base units, we need to express it in seconds. Since 1 ns = [tex]10^{-9}[/tex] s, we can multiply 3 ns by [tex]10^{-9}[/tex]to obtain:

3 ns x [tex]10^{-9}[/tex] s/ns = 3 x [tex]10^{-9}[/tex] s = 3 × [tex]10^{-9}[/tex] s

Finally, to convert the third quantity, 1 x 10³ Hz, to SI base units, we need to express it in hertz (Hz). Since the value is already in Hz, we don't need to perform any conversions:

1 x 10³ Hz = 1 × [tex]10^3[/tex] Hz

Thus, the expression 13 PW 3 ns. 1 x 10³ Hz can be expressed in SI base units as: 13 × 10^15 W * 3 × 10^(-9) s * 1 × 10^3 Hz.

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A wire's resistance is inversely correlated with its cross-sectional area and inversely proportional to its length. Wire A will therefore have four times the area of Wire B if it is twice as long and twice as thick.

The distance between charged particles will increase as the conductor's cross-sectional area does. As a result, there will be less chance of electron collisions. As a result, resistance will decrease as the conductor's cross-sectional area increases.

It is inversely related to the wire's cross-sectional area. The resistance decreases with increasing wire cross-section area and increases with decreasing cross-section area.

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300 N of force must be applied by the mechanic perpendicular to the end of the wrench.

The SI unit of force is the newton, denoted by the letter N. Base units that are pertinent to force are: The symbol for the length unit of a metre is m. the kilogramme (kg), a unit of mass. S represents the second, a measure of time.

The following formula can be used to resolve this issue:

Torque equals force times distance times sin (angle), where:

Torque is the 84 mN desired torque.

Force is the unknowable force that we must discover.

Distance is the length of the wrench in meters, which is 0.28 m

Angle is the angle between the wrench and the direction of the force, which is 90 degrees for a perpendicular force (sin(90) = 1)

Plugging in the values, we get:

84 mN = Force x 0.28 m x 1

Solving for Force, we get:

Force = 84 mN / 0.28 m

Force = 300 N

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The reaction to the action force of the impact of the ball against the player's glove is option B): "the force the glove exerts on the ball".

This is known as Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. So, as the ball exerts a force on the glove, the glove exerts an equal and opposite force on the ball, allowing the player to catch the ball. The other options listed (A, C, and D) are not directly related to the action-reaction force pair involved in the catch.

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A sine wave is a periodic signal that can be measured in terms of it's amplitude, frequency and phase.

Sine waves have equal phase, frequency, and amplitude. The phase of a sine wave determines its position relative to a reference point in time, and a sine wave always starts at zero phase. The frequency of a sine wave is the number of cycles it completes in one second, and the amplitude of a sine wave is the maximum value it reaches. In a pure sine wave, these three properties are constant and equal.

Sine waves are analog signals and are commonly used in communication systems, audio and video processing, and electronic signal processing. They are also used in scientific and engineering applications, such as vibration analysis, acoustics, and control systems.

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--The complete question is, a sine wave is a periodic signal that, 1) can be measured in terms of it's amplitude, frequency and phase 2) has equal phase, frequency and amplitude 3) is digital or analog 4) has a maximum peak amplitude equal to it's frequency--

a. Upthrust on the solid:

[tex]Upthrust = volume of solid * density of fluid * g = 1000 kg/m^3 * volume of solid * 10 m/s^2[/tex]

b. Volume of the solid:

[tex]volume = mass/density = 1.3 kg / (1000 kg/m^3) = 1.3 x 10^-3 m^3[/tex]

c. Density of the solid:

So,[tex]density = mass/volume = 1.3 kg / (1.3 x 10^-3 m^3) = 1000 kg/m^3[/tex]

Upthrust is the upward force exerted on an object immersed in a fluid. It is equal to the weight of the fluid displaced by the object and acts in the opposite direction to gravity. Upthrust helps to counteract the weight of the object and keep it afloat.

a. The upthrust on an object immersed in a fluid is equal to the weight of fluid displaced by the object. The weight of fluid displaced can be calculated using the formula:

Weight of fluid = volume of fluid * density of fluid * g

Since the solid is completely immersed in water, the volume of the fluid displaced is equal to the volume of the solid. The density of water is given as 1000 kg/m^3, and the acceleration due to gravity is given as[tex]10 m/s^2.[/tex]

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Answer:

Explanation:

The Root Mean Square (RMS) pressure of a waveform can be defined as the square root of the average of the square of the pressure values over one period of the wave. The RMS pressure provides a measure of the effective pressure of a waveform and is often used to compare the strength of different waveforms.

For a square wave, the RMS pressure can be found as follows

P_RMS = sqrt((1/T) * ∫_0^T (P_square(t))^2 dt)

Where T is the period of the waveform and P_square(t) is the pressure value of the square wave at time t. The integral is taken over one period of the waveform.

For a triangular wave, the RMS pressure can be found as follows:

P_RMS = sqrt((1/T) * ∫_0^T (P_triangular(t))^2 dt)

Where T is the period of the waveform and P_triangular(t) is the pressure value of the triangular wave at time t. The integral is taken over one period of the waveform.

The RMS pressure of a sinusoidal wave is given by the equation:

P_RMS = (A/sqrt(2))

Where A is the amplitude of the waveform.

Comparing the RMS pressures of the three waveforms, it can be seen that the RMS pressure of a sinusoidal wave is (A/sqrt(2)) which is smaller than the RMS pressure of a square wave or a triangular wave. This is because the square wave and triangular wave have sharper transitions from positive to negative values compared to the sinusoidal wave, which results in higher peak pressure values and hence a higher RMS pressure.

It is worth noting that while the RMS pressures of the three waveforms are different, they provide a measure of the effective pressure of the waveforms and can be used to compare their strengths.

Here is a definition of each variable used in the equation:

P_RMS: The Root Mean Square (RMS) pressure of the waveform. It is a measure of the effective pressure of the waveform.

T: The period of the waveform. It is the time it takes for the waveform to repeat itself.

P_square(t): The pressure value of the square wave at time t.

P_triangular(t): The pressure value of the triangular wave at time t.

∫_0^T: The integral symbol. It represents the sum of the pressure values over one period of the waveform, from time t = 0 to time t = T.

A: The amplitude of the waveform. It is the maximum positive or negative deviation from the zero line of the waveform.

sqrt: The square root symbol. It is used to find the square root of a value.

(A/sqrt(2)): The RMS pressure of a sinusoidal wave. It is calculated as the amplitude divided by the square root of 2.

Answer: A bear

Explanation:

I think it is a bear because in the North pole it swims to get food and walks in land to hide.

The given statement " Living cells contribute to the turbidity of a culture, and this contribution can be a disadvantage of the indirect spectrophotometer method, is True.

The indirect spectrophotometer method, which measures the turbidity of a culture to estimate cell density, assumes that the only contributor to turbidity is the cells themselves. However, other factors such as debris, bubbles, and extracellular materials can also contribute to the turbidity, leading to inaccuracies in cell density measurements. In microbiology, turbidity is a measure of the cloudiness or haziness of a liquid culture, and it is often used as an indirect measure of cell density. The more cells there are in the culture, the more turbid it will appear.

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Answer:

Explanation:

To determine the acceleration of the sled, we need to balance the net force acting on it with its weight.

The weight of the sled and person is given by:

Weight (W) = mass (m) x acceleration due to gravity (g) = 48 kg x 9.8 m/s^2 = 470.4 N

The weight acts vertically downward, perpendicular to the slope of the hill. The net force acting on the sled can be found by subtracting the force of friction from the thrust:

Net force (F) = thrust (T) - weight (W) x sin(θ)

where θ is the angle between the horizontal and the slope of the hill, given as 16.2°.

The force of friction is zero in this case, as the sled is moving up a frictionless icy hill.

So, the net force is simply equal to the thrust:

Net force (F) = thrust (T) = 431 N

The acceleration of the sled is given by:

acceleration (a) = net force (F) / mass (m) = 431 N / 48 kg = 9 m/s^2

Therefore, the magnitude of the acceleration of the sled while it travels up the hill is 9 m/s^2.

1. As the Tsunami wave approaches the beach, water levels will start to rise, and the ocean may appear to recede away from the shoreline.

2. The ocean may become very calm, and the surface may appear glassy.

3. Strong currents may be felt, and debris such as seaweed, branches, and shells may be seen rushing away from the shoreline.

4. Animals such as birds may be seen fleeing from the shoreline, and a loud roar may be heard as the wave approaches.

5. The wave will eventually reach the beach, and the water levels will quickly rise to a high level. The wave will then crash into the shore, causing destruction and flooding.

A  Tsunami is a powerful series of ocean waves caused by an underwater disturbance, such as an earthquake, volcano, or landslide. These waves travel across the ocean at high speeds and can reach up to hundreds of feet in height when they reach coastlines, causing severe flooding and destruction. Tsunamis are also known as seismic sea waves, and they can occur anywhere in the world.As the wave energy travels, it causes the sea level to rise and creates a “wave” that can travel up to 500 miles per hour. Tsunamis can reach heights of up to 100 feet and can cause extensive damage to coastal areas. The strength of the wave depends on the intensity of the earthquake or eruption that caused it.

Tsunamis usually arrive onshore suddenly and without warning, leaving little time for people to evacuate to safety and are often accompanied by strong currents and large amounts of debris, making them even more destructive.

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Based on the graphs in the figure, the motion of a car and a truck that initially alongside each other at time t = 0. And at time T, the distances traveled by the vehicles since time t = 0 is the car will have travelled further than the truck (option C)

Looking at the graph, the distance traveled by the truck and the car at time T = t is equal.

When T = t, the journey's duration and the speeds of the automobile and truck exactly match each other, as shown by the graph.

Consequently, if we take the equation into account;

V = Δs/Δt

Where;

v = velocity

s = the distance change

t = time change.

Given that the coordinates of velocity and time for the automobile and the truck match, the two objects have gone the same distance.

The area under the curve is used to calculate the mit. The truck would have traveled nearly half as far as the car, which will have traveled the greatest distance.

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Answer:

KE = 3456 J

Explanation:

At a height of 8.0 cm from the bulb's center, the radiation pressure caused by a 75-w bulb is calculated as current=watts divided by voltage=75/120=0.625 amperes.

The mechanical stress that is applied to any surface as a result of the electrical waves and the object exchanging momentum is known as radiation pressure. When photons hit the object's surface in this instance, momentum is transferred.

The development of cometary tail, in which dust particles ejected by cometary nuclei are driven by solar radiation into distinctive trailing patterns, is another visually striking example of radiation pressure. With the development of, it became possible to apply radiation pressure to terrestrial environments.

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The kinetic energy of the brick equal the elastic potential energy at the top of the hill. Using this, the speed of the brick is 14 m/s.

The elastic potential of a spring is directly proportional to the squire of the displacement.

Then,

p = 1/2 k x²

Given that, spring constant k = 500 N/m

height of the hill x = 2 m

weight of the load = 100 N

then mass = 100N/9.8 m/s² =10.20 Kg.

At the top of the hill, kinetic energy of the hill is equal to the elastic potential.

then, 1/2 mv² =  1/2 k x²

speed v of the brick  = √kx²/m

v = √(500 N/m × 2 m²/10.20 kg)

  = 14 m/s.

Therefore, the speed of the brick at the top of the hill is 14 m/s.

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The temperature axis is the horizontal axis on a graph where the temperature values are plotted. In other words, it is the x-axis of a graph where the values on the x-axis represent different temperatures. The temperature axis is usually labeled with the units in which temperature is measured, such as degrees Celsius (°C), degrees Fahrenheit (°F), or Kelvin (K). The temperature axis is an important component of many scientific and engineering graphs, particularly those that involve the study of thermal properties and changes in temperature over time.

The plot should have the temperature on the x-axis and the pressure on the y-axis. The temperature axis should be labeled in degrees Celsius (°C) and the pressure axis should be labeled in units of pressure such as Pascals (Pa) or atmospheres (atm).

The data points should be plotted between 20°C and 60°C, with several points at different temperatures and corresponding pressures. These points should be labeled with their respective temperature and pressure values.

A line showing the ideal gas law should be plotted on the same graph. This line should be a smooth curve that passes through or near the data points. The equation of the ideal gas law is PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the absolute temperature. When plotted on a pressure-temperature graph, the ideal gas law forms a straight line.

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In order for the clown to land unharmed, the other clowns should hold the net at a point along the trajectory of the clown that is equal to the launch height of the clown.

The point can be calculated using the following equation:

Distance = velocity × time

Where velocity = 40 m/s and time = 2(velocity × sin(60o))/9.8 (where 9.8 is gravitational acceleration).

Therefore, the distance = 40 m/s × 2(40 m/s sin(60o))/9.8 = 80 m.

The other clowns should aim to place the net at a point that is 80 meters away from the cannon and at a height of 40 meters. This point should correspond to the apex of the trajectory, which is the highest point that the clown will reach when launched. The clowns should also make sure that the net is held at an angle of 30 degrees with respect to the horizontal, to ensure that the clown lands safely at the same level where it was launched.

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The gravitational force between the ball of mass 100 Kg and earth at a distance of 6.38 × 10⁶ m is 979.9 N.

The gravitational force is the force by which an object attracts other object into its center of mass. The gravitational force depends on the masses of the objects and distance between them by the equation written below:

Fg = G m1 m2/r²

where G is the universal gravitational constant equal to 6.67 × 10⁻¹¹ N/kg²m²

The gravitational force  is given 2.30 ×10⁻⁸ N.

distance  between the objects = 10 m.

then Fg = 6.67 × 10⁻¹¹ N × (100 kg × 5.98 ×10²⁴ kg)/(6.38 × 10⁶ m)² =  979.9 N

Therefore, the gravitational force between the ball and earth is 979.9 N. IN similar way, the force between any two objects can be determined using the given distance and mass.

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If a lining is ciliated, then it is covered in hair. Thus, the correct option is D.

Cilia are the small, slender, hair-like structures which are present on the surface of all the mammalian cells. They are primitive in nature and could be single or many types.

Cilia play a major role in the locomotion of body parts. Cilia are also involved in the mechanoreception. The organisms which possess the cilia are known as ciliates.

The bronchus present in the lungs are lined with the hair-like projections called cilia which move the microbes and debris up and out of the airways in the respiratory tract. Scattered throughout the cilia are the goblet cells which secrete mucus that helps in protection of the lining of the bronchus and trapping the microorganisms.

Therefore, the correct option is D.

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Answer:

It's hair!

Explanation:

I got it right on me test~

Answer:

sorry I'm not smart

Explanation:

The east would be the location of the Sun's rising and setting are the changes would you anticipate seeing.

Annual motion, which is a direct result of the Earth's rotation around the sun, is the visible yearly move of the stars as seen from Earth. The ecliptic is a line on the surface of a sphere around which the revolves around the sun 360 degrees each year.

We, the watchers on Earth, whirl past this foreground of far-off stars as the planet rotates on its axis. The stars seem to travel throughout our darkness of space from east to west as Earth spins for the same reason.

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If a particle is moving along a straight line, the net change and the net displacement are always equal.

If a particle is moving along a straight line, then the net change and the net displacement are always the same. Net change is the total change in position of the particle, which is the final position minus the initial position. Net displacement, on the other hand, is the change in position of the particle in a particular direction, which is the final displacement minus the initial displacement.

When a particle moves along a straight line, the direction of its displacement is always the same as the direction of its motion. Therefore, the net displacement is simply the distance traveled by the particle in the direction of motion. And since the net change in position is also the distance traveled by the particle, the net change is always equal to the net displacement in this case.

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