a submarine hovers at yards below sea level. if it ascends yards and then descends yards, what is the submarine’s new position, in yards, with respect to sea level?

Answer:

When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright.

Explanation:

Option (a) Real and inverted , is the correct answer .

The image formed by the eye's lens is normally a) real and inverted.The image formed by the eye's lens is normally real and inverted. This is due to the way light is refracted by the lens and focused onto the retina.

The human eye works similarly to a camera, with a lens that focuses light onto the retina at the back of the eye. The lens in the eye refracts (bends) light to form an image on the retina. This process creates a real and inverted image.

Light rays from an object pass through the cornea and the lens of the eye. The lens adjusts its shape to focus the incoming light onto the retina. The retina contains light-sensitive cells called photoreceptors that convert light into electrical signals, which are then transmitted to the brain for interpretation.

When light rays converge on the retina, an inverted image is formed. This means that the top of the object is projected onto the bottom of the retina, and the bottom of the object is projected onto the top of the retina. This inverted image is the initial visual information that is sent to the brain.

The image formed by the eye's lens is normally real and inverted. This is due to the way light is refracted by the lens and focused onto the retina. The inverted image is then processed by the brain to perceive the object in its correct orientation.

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Explanation:

Hydraulic systems use the pump to push hydraulic fluid through the system to create fluid power. The fluid passes through the valves and flows to the cylinder where the hydraulic energy converts back into mechanical energy. The valves help to direct the flow of the liquid and relieve pressure when needed

Answer:

  I = 1.8 N s,  it is directed towards the right  

Explanation:

For this exercise we use the relationship between momentum and moment

         I = Δp

         F t = p_f - p₀

in this case the initial velocity is v₀ = - 2,0 m / s and final velocity v_f = 10,0 m / s, we assume the positive right direction

          I = m (v_f - v₀)

let's calculate

         I = 0.150 (10.0 - (-2.0))

         I = 0.150 (10 + 2)

         I = 1.8 N s

as the impulse is positive it is directed towards the right

Answer:

6544.07 J

Explanation:

From the question given above, the following data were obtained:

Distance (d) = 15 m

Force (F) = 628 N

Angle (θ) = 46°

Workdone (Wd) =?

The work done can be obtained by using the following formula:

Wd = Fd × Cos θ

Wd = 628 × 15 × Cos 46

Wd = 9420 × 0.6947

Wd = 6544.07 J

Therefore, the workdone is 6544.07 J

The electronic throttle control (ETC) system offers the ability to eliminate certain components and mechanisms.

The electronic throttle control (ETC) system is a technology that replaces traditional mechanical linkages between the accelerator pedal and the engine throttle with an electronic sensor and actuator. By doing so, it provides several advantages in terms of efficiency, control, and safety. One significant benefit is the elimination of various components and mechanisms found in conventional throttle systems.

These include the throttle cable, throttle position sensor, idle air control valve, and cruise control module, among others. With the ETC system, these components are no longer needed, simplifying the overall design and reducing maintenance requirements.

Instead, the ETC system relies on electronic signals and actuators to precisely control the engine throttle opening, allowing for improved responsiveness and fuel efficiency. Furthermore, the elimination of mechanical linkages reduces the risk of failures or malfunctions associated with wear and tear. Overall, the ETC system streamlines the throttle control process while enhancing performance and reliability.

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The ball's velocity after the collision is v

For a potential U(x)=-4x³+2,  the force F at x = 2m is 36N

Define force

A force is an effect that changes, or accelerates, the motion of a mass-containing object. It is a vector quantity since it can be a push or a pull and always has magnitude and direction.

A force is a physical quantity that alters the shape or size of an item, affects the direction of motion of an object in motion, or tends to create a motion in an object at rest.

P2 will be -m(2V)=-2mV

P₁ = m(V) = mV

Pi = -mV

Pf=mv1+mv2

P₁ = Pf

-mV = mv2-mv1

V2 + V₁ = -V

e=1(elastic collision)

V2 - V1 /2V + V will be equal to e

V2+V₁ = 3V

V₁ = −2V and V₂ = V

For a potential U(x)=-4x³+2, find the force F at x = 2m:

U(2)=-4*2³+2

U(2)= 36N

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Answer:

The magnitude of the impulse experienced by the particle is 100 kg.m/s.

Explanation:

Given;

mass of the particle, m = 5 kg

initial velocity of the particle, v₁ = 10 m/s

assuming the particle rebounds with same velocity backwards, v₂ = - 10 m/s

The impulse experienced by the particle is the change in linear momentum;

J = ΔP = mv₁ - mv₂

J = m(v₁ - v₂)

J = 5 (10 - (-10))

J = 5 (10 + 10)

J = 5(20)

J = 100 kg.m/s

Therefore, the magnitude of the impulse experienced by the particle is 100 kg.m/s.

Answer:

P since without a host the parasite won't be able to survive they would start decreasing as well but if the hosts were no more then they would go extinct. But since it is just decreasing then it should be P

In a toroidal solenoid with 300 turns of wire, a mean radius of 12.0 cm, and a cross-sectional area of 4.90 cm², with a current of 5.20 A, the magnetic field, self-inductance, energy stored in the magnetic field, and energy density can be calculated.

Part A: To calculate the magnetic field inside the solenoid, we can use the formula for the magnetic field of a solenoid:[tex]B = \mu_0 * n * I[/tex] where B is the magnetic field, μ₀ is the permeability of free space [tex](4\pi * 10^-^7 m/A)[/tex], n is the number of turns per unit length (n = N / L, where N is the total number of turns and L is the length of the solenoid), and I is the current. Plugging in the given values, we find B = [tex](4\pi * 10^-^7 m/A)[/tex] * [tex](300 / (2\pi * 0.12 m)) * 5.20 A[/tex].

Part B: The self-inductance of a solenoid can be calculated using the formula [tex]L = (\mu_0 * N^{2} * A) / L[/tex], where L is the length of the solenoid and A is the cross-sectional area. Plugging in the given values, we get [tex]L = (4\pi * 10^-^7 T m/A) * (300^2) * (4.90 * 10^-2 m^2) / (2\pi * 0.12 m).[/tex]

Part C: The energy stored in the magnetic field of a solenoid can be calculated using the formula U = (1/2) * L * I², where U is the energy stored, L is the self-inductance, and I is the current. Plugging in the values, we find [tex]U = (1/2) * [(4\pi * 10^-^7 T m/A) * (300^2) * (4.90 * 10^-^4 m^2) / (2\pi * 0.12 m)] * (5.20 A)^2[/tex].

Part D: The energy density in the magnetic field is given by u = U / V, where u is the energy density, U is the energy stored, and V is the volume of the solenoid. Dividing the answer from Part C by the volume of the solenoid gives us the energy density.

Part E: Find the answer for Part D by dividing the answer to Part C by the volume of the solenoid.

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Answer:

1 is true  4 is false 5 is c i think 6 is a 7 is c 3 is a 2 is c 8 is c 9 is true 10 is c

Explanation:

Answer:

so we don't drown and die.

Explanation:

The force between the Moon and the Earth is calculated using the formula [tex]F = G(m_1*m_2)/r^2[/tex], where F is the force between the two objects, G is the universal gravitational constant, [tex]m_1[/tex] and [tex]m_2[/tex] are the masses of the two objects, and r is the distance between the two objects. Therefore, if the mass of the Moon is somehow made two times greater than its actual mass, the force between the Moon and the Earth would also increase.

To calculate the exact increase in force, we can use the same formula and compare the force before and after the increase in mass. Let's assume that the mass of the Moon is m before the increase and 2m after the increase. We can then use the formula to calculate the force before and after the increase, as follows:
- Before: [tex]F_1 = G\frac{mM}{r^2}[/tex]
- After: [tex]F_2 = G\frac{2mM}{r^2}[/tex]

To compare the two forces, we can divide [tex]F_2[/tex] by [tex]F_1[/tex]:
[tex]\frac{F_2}{F_1} = [G\frac{2mM}{r^2} ]/[G\frac{mM}{r^2} ][/tex]
[tex]\frac{F_2}{F_1} =2[/tex]

Therefore, the force between the Moon and the Earth would become two times greater if the mass of the Moon were somehow made two times greater than its actual mass. This is because the force of gravity is directly proportional to the masses of the objects involved.

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The energy released in the fusion reaction is approximately 3.598 × 10¹⁶ Joules.

To calculate the energy released in a fusion reaction, we need to determine the mass defect and then apply Einstein's mass-energy equivalence equation, E = mc².

The mass defect (Δm) is the difference in mass between the reactants and the products. It is given by the sum of the masses of the reactants minus the sum of the masses of the products.

Reactants:

14n (14.00307 u)

32s (31.97207 u)

6li (6.01512 u)

Products:

12c (12.00000 u)

Δm = (mass of reactants) - (mass of products)

Δm = (14.00307 u + 31.97207 u + 6.01512 u) - (12.00000 u)

Δm = 51.99026 u - 12.00000 u

Δm = 39.99026 u

Now, we can calculate the energy released (E) using Einstein's equation, E = Δmc².

E = (39.99026 u) * (c²)

E = (39.99026 u) * (2.998 × 10⁸ m/s)²

E ≈ 3.598 × 10¹⁶ Joules

Therefore, the energy released in the fusion reaction is approximately 3.598 × 10¹⁶ Joules.

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The work needed to stretch the spring a distance of 5 cm is 1100 N·cm.

To determine the work needed to stretch the spring a distance of 5 cm, we need to calculate the area under the force vs. distance graph within that range. Looking at the graph, we can see that the force initially increases linearly as the distance increases and then levels off.

To calculate the work, we need to find the area of the triangle formed by the initial linear part of the graph and the rectangle representing the constant force. The height of the triangle is the force at 5 cm, which appears to be around 200 N. The base of the triangle is 5 cm. The area of the triangle is given by 0.5 * base * height, which is 0.5 * 5 cm * 200 N = 500 N·cm .The rectangle representing the constant force has a height of 200 N and a base of 3 cm (since it starts at 2 cm and ends at 5 cm). The area of the rectangle is base * height, which is 3 cm * 200 N = 600 N·cm.

Adding the areas of the triangle and the rectangle, we get a total work of 500 N·cm + 600 N·cm = 1100 N·cm.

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If the machine is used for a total of 7 hours per day. Hence, the machine will take approximately 9.15 days to complete the task.

Let's solve the problem step by step: Volume of the cylindrical hole: V = πr²h where, r is the radius of the hole, and h is the depth of the hole.

Diameter = 10 cm ⇒ radius, r = 5 cm = 0.05 m Depth = 1.75 m

∴ Volume of the cylindrical hole dug by the machine in 1 hour =

V = πr²h= π × (0.05 m)² × (1.75 m)= 0.004326 m³

We need to find the time required to dig a hole of total depth 112 m.

Total number of such cylindrical holes dug by the machine:

Total number of holes = 112 / 1.75= 64

∴ Total volume of all the 64 holes = 64 × 0.004326 m³= 0.27744 m³

Total time required to dig this volume of rock:

Let t be the time required. In one day, the machine works for 7 hours.

Thus, Volume of rock dug in 1 day = 7 × 0.004326 m³= 0.030282 m³

∴ Total number of days required to dig the required volume of rock = (0.27744 / 0.030282) days

= 9.1504 days (approx.)

∴ The machine will take approximately 9.15 days to complete the task.

Answer:  In one hour, the machine can dig a hole with diameter 10 cm through a 1.75 m depth of consistently hard rock.

The volume of the cylindrical hole dug by the machine in 1 hour is

V = πr²h

where r is the radius of the hole, and h is the depth of the hole. The diameter of the hole is 10 cm, and therefore, the radius is 5 cm or 0.05 m. The depth of the hole is 1.75 m.

Hence, the volume of the cylindrical hole dug by the machine in 1 hour is 0.004326 m³.

We need to find the time required to dig a hole of total depth 112 m.

The total number of such cylindrical holes dug by the machine is 112 / 1.75 or 64.

The total volume of all the 64 holes is

64 × 0.004326 m³ = 0.27744 m³.

Let t be the time required. In one day, the machine works for 7 hours.

Thus, the volume of rock dug in 1 day is

7 × 0.004326 m³ = 0.030282 m³.

Therefore, the total number of days required to dig the required volume of rock is

0.27744 / 0.030282 days or approximately 9.15 days.

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The stepwise mechanism for the acid-catalyzed esterification of p-aminobenzoic acid to give ethyl p-aminobenzoate involves several steps.

Here's a possible mechanism:

Step 1: Protonation of the carboxylic acid group

The acid catalyst, typically a strong mineral acid like sulfuric acid               ([tex]H_2SO_4[/tex]), donates a proton to the carboxylic acid group of p-aminobenzoic acid. This step activates the carboxylic acid for subsequent reactions.

[tex]H_2SO_4[/tex] + p-aminobenzoic acid → p-aminobenzoic acid - [tex]H^+ + HSO_4^-[/tex]

Step 2: Nucleophilic attack of the alcohol

In this step, the nucleophilic oxygen of the alcohol (usually ethanol, [tex]CH_3CH_2OH[/tex]) attacks the carbonyl carbon of the activated p-aminobenzoic acid, forming a tetrahedral intermediate.

p-aminobenzoic acid - [tex]H^+ + CH_3CH_2OH[/tex] → p-aminobenzoate ester intermediate

Step 3: Proton transfer

In this step, a proton is transferred from the tetrahedral intermediate to the acid catalyst ([tex]H^+[/tex]), regenerating the acidic conditions for further reactions.

 p-aminobenzoate ester intermediate + [tex]H^+[/tex] → p-aminobenzoate ester + [tex]H_2SO_4[/tex]

Step 4: Loss of water and formation of ester

The tetrahedral intermediate undergoes a rearrangement where a water molecule is eliminated, resulting in the formation of the desired ester, ethyl p-aminobenzoate.

 p-aminobenzoate ester → ethyl p-aminobenzoate

The curved arrows are used to symbolize the movement of electron pairs during each step of the reaction. The arrows should originate from a source of electrons and point towards the electron-deficient atom.

Additionally, this mechanism is a simplified representation, and there may be additional intermediates or proton transfers involved depending on the reaction conditions.

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The magnetic field strength H within the core in the absence of the magnetic substance is 0.000001671 A/m.

The permeability of the core material is 227684.8 Wb/A m.

A toroid filled with a magnetic substance carries a steady current of 1.76 A.

The coil contains 1450 turns

average radius of coil is 2.19 cm.

The magnetic field through the toroid is 0.199333 T.

Assume the flux density is constant.

The magnetic field B through the toroid is

B = μHnI

Circumference of toroid

= 2πr

= 2 x π x 0.0219 m

= 0.1377 m

Mean length of toroid,

l = Circumference = 0.1377 m

Total number of turns,

N = 1450

n = 1450 / 0.1377

n = 10526.7 turns/m

1.

Using above values,

B = μHnI

H = B / (μnI)

H = 0.199333 / (μ x 10526.7 x 1.76)

H = 0.000001671 A/m

Hence, the magnetic field strength H within the core in the absence of the magnetic substance is 0.000001671 A/m.

2.

The permeability of the core material is,

μ = B / (HnI)

μ = 0.199333 / (0.000001671 x 10526.7 x 1.76)

μ = 227684.8 Wb/A m

Therefore, the permeability of the core material is 227684.8 Wb/A m.

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The change in the momentum of the ball after the ball bounces back at a speed of 10 m/s, given that its initial speed is 10 m/s is 5 Ns (option A)

First, we shall list out the given parameters from the question. Details below:

The change in the momentum of the ball can be obtained as follow:

Change in momentum = m(v + u) (since there is a rebound)

Change in momentum = 0.25 × (10 + 10)

Change in momentum = 0.25 × 20

Change in momentum = 5 Ns

Thus, we can conclude that the change in the the momentum of the ball is 5 Ns (option A)

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A compass is a tool that is used to detect the earth's magnetic field and determine the cardinal directions.

It consists of a magnetized needle that aligns itself to the Earth's magnetic field. The compass needle always points in the direction of the earth's magnetic north. Therefore, if the compass needle is initially held so that it points due south and is then allowed to swing freely, it will rotate until it points due north. The energy that is released when the compass needle rotates from due south to due north is not significant. This is because the energy required to rotate the needle is very small. The amount of energy required to rotate the compass needle depends on the strength of the earth's magnetic field, the weight of the needle, and the friction between the needle and the pivot point of the compass. However, the energy released by the rotation of the compass needle is also very small and is negligible.In conclusion, the amount of energy released by the compass needle rotating from due south to due north is very small and negligible.

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If the length of a simple pendulum increases by a factor of 2, the period increases by a factor of √2. This relationship is derived from the formula for the period of a simple pendulum .

The period of a simple pendulum is given by the formula:

T = 2π√(L/g)

Where:

T is the period of the pendulum,

L is the length of the pendulum, and

g is the acceleration due to gravity.

Given that the length of the pendulum increases by a factor of 2, we can denote the new length as 2L.

Substituting this new length into the formula for the period:

T' = 2π√(2L/g)

To determine how the period T' relates to the original period T, we can compare the two periods:

T' / T = (2π√(2L/g)) / (2π√(L/g))

T' / T = √(2L/g) / √(L/g)

T' / T = √(2L/g * g/L)

T' / T = √(2)

T' / T = √2

Therefore, the period T' increases by a factor of √2 when the length of the pendulum increases by a factor of 2.

If the length of a simple pendulum increases by a factor of 2, the period of the pendulum increases by a factor of √2. This relationship is derived from the formula for the period of a simple pendulum, where the period is inversely proportional to the square root of the length of the pendulum.

By substituting the new length into the formula and comparing it to the original length, we find that the period increases by a factor of √2. It is important to note that this relationship holds true as long as the amplitude of the pendulum remains small, such that the small angle approximation is valid.

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Answer:  a substance which does not readily allow the passage of heat or sound.  so I think A or C but I pick A

Explanation:

Answer:

a) 500 J

Explanation:

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

[tex] P.E = mgh[/tex]

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

In Science, the potential energy possessed by an object or body is the same as the work done by the object or body.

Since we know that the object possessed 500 Joules of potential energy; it would ultimately require to do a work of 500 Joules to lift the object.

Mathematically, work done = force * distance

But force = mass * acceleration due to gravity

F = mg; d = h

Substituting into the work done formula, we have;

Hence, Workdone = Fd = mgh

Yes, it is possible to produce a real image using a 15cm and a 10cm convex lens together by properly selecting the focal lengths and positioning of the lenses .

To determine the characteristics of the image formed by two lenses, we need to consider the lens formula and the lens-maker's formula. The lens formula is given by:

1/f = 1/v - 1/u,

where f is the focal length of the lens, v is the image distance, and u is the object distance.

Let's assume the 15cm lens has a focal length of f1 and the 10cm lens has a focal length of f2. To produce a real image, the object should be placed beyond the focal point of the first lens (f1). Suppose the object distance (u1) is greater than f1. Then, using the lens formula for the first lens:

1/f1 = 1/v1 - 1/u1.

The image formed by the first lens (I1) will act as the object for the second lens. The image distance (u2) of the second lens will be equal to the image distance (v1) of the first lens. Applying the lens formula for the second lens:

1/f2 = 1/v2 - 1/u2.

To find the overall image distance (v2) and the characteristics of the image formed by the two lenses, we need to solve these equations simultaneously.

By properly selecting the focal lengths and positioning of the lenses, it is possible to produce a real image using a 15cm and a 10cm convex lens together. The specific characteristics of the image, such as its size, orientation, and location, can be determined by solving the lens formula equations for the given lens parameters.

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The electric field (E) at r=4R is approximately 27.5 N/C.  It is important to note that this calculation assumes a uniformly charged sphere and that the charge distribution is maintained throughout the volume of the sphere.

The electric field due to a uniformly charged sphere at a point outside the sphere can be calculated using the equation:

E = (k * Q * r) / (R^3)

Where:

E is the electric field at a distance r from the center of the sphere,

k is the electrostatic constant (k = 8.99 × 10^9 N m^2/C^2),

Q is the total charge of the sphere,

r is the radial distance from the center of the sphere, and

R is the radius of the sphere.

Given:

E at r=R/4 is 440 N/C.

We need to find E at r=4R.

To find E at r=4R, we can use the concept of electric field being inversely proportional to the cube of the distance.

Using the relationship:

E1 * r1^3 = E2 * r2^3

We can substitute the given values:

(440 N/C) * [(R/4)^3] = E2 * (4R)^3

Simplifying the equation:

(440 N/C) * (R^3 / 64) = E2 * (64R^3)

(R^3) cancels out, and we can solve for E2:

E2 = (440 N/C) * (64 / 64)

E2 = 440 N/C

Therefore, the electric field at r=4R is approximately 27.5 N/C.

The electric field at a radial distance of 4R from the center of a uniformly charged insulating sphere, with a known electric field of 440 N/C at r=R/4, is approximately 27.5 N/C. This relationship is derived from the formula for the electric field due to a uniformly charged sphere, which states that the electric field is inversely proportional to the cube of the distance from the center of the sphere.

By using the given electric field at r=R/4 and applying the relationship, we can find the electric field at r=4R. It is important to note that this calculation assumes a uniformly charged sphere and that the charge distribution is maintained throughout the volume of the sphere.

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After 3.0 seconds, the projectile will have a horizontal displacement of 171 meters and a vertical displacement of 44.1 meters.

When a projectile is fired horizontally, its initial vertical velocity is zero. However, the horizontal velocity remains constant throughout its motion. We can calculate the horizontal and vertical components of displacement after 3.0 seconds using the following equations:

Horizontal component of displacement:

d_horizontal = v_horizontal * t

Vertical component of displacement:

d_vertical = v_vertical * t + (1/2) * g * t^2

Since the projectile is fired horizontally, the horizontal velocity (v_horizontal) remains constant at the initial speed. Thus, the horizontal component of displacement is:

d_horizontal = v_horizontal * t

= (57 m/s) * (3.0 s)

= 171 m

The vertical component of velocity (v_vertical) will increase due to the effect of gravity. Therefore, we need to calculate the vertical component of displacement using the equation:

d_vertical = v_vertical * t + (1/2) * g * t^2

Since the initial vertical velocity is zero, the equation simplifies to:

d_vertical = (1/2) * g * t^2

= (1/2) * (9.8 m/s^2) * (3.0 s)^2

= 44.1 m

Thus, the vertical component of displacement after 3.0 seconds is 44.1 meters.

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The frequency of a particular spectral line of the sun compare with the frequency of that line observed from a source on earth may differ slightly due to the Doppler Effect, the difference is typically small and can be accurately measured.

When comparing the spectral lines of the sun with those observed from Earth, it's important to consider the Doppler Effect, which causes the wavelengths of light to appear shifted when an object is moving relative to an observer. The frequency of a particular spectral line of the sun will appear slightly different than the frequency of that line observed from a source on Earth due to the Doppler Effect. This effect causes the light from the sun to appear slightly redshifted or blueshifted depending on the relative motion of the sun and Earth.

However, the difference in frequency is typically small and can be accurately measured by modern telescopes. By comparing the frequencies of the spectral lines observed from the sun and Earth, astronomers can study the motion of celestial bodies and determine their chemical compositions. In conclusion, while the frequencies of particular spectral lines of the sun and those observed from a source on Earth may differ slightly due to the Doppler Effect, the difference is typically small and can be accurately measured.

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Explanation:

transfer to babes are always at your advice by a particular motion being a particular wave motion along didn't wave is a wave which particular is a medium move a direction parallel to the direction of the wave moves something that is similar in the surveys on the medium moves of the same direction and bathe an accident to one or two Dimensions do in London killing babe attacks in one dimension and transverse waves attacks in two Dimensions the Waze cannot be paralyzed or organized

Explanation:

It is necessary that the student is always focused on his / her greatest goal in his / her academic life. There are many students who aspire to enter a certain college, or to pursue a particular professional career. So my advice for facing social changes that can have a negative impact on your success as a student is to plan your future goals and ambitions, always be up to date with the demands of society, seek help if necessary and always dedicate yourself to the maximum in your studies.

To deal with the social changes that may result in negative impact, the student must be advised, encouraged and also seek psychological help if necessary.

Social change involves alteration or deviations of the social order of a student.

To deal with the social changes that may result in negative impact, the student must be advised, encouraged and also seek psychological help if necessary.

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