what is the sound intensity level of a sound with an intensity of 2.4ร10โ6 w/m2 ?; what is the sound intensity level of a sound with an intensity of 4.0ร10โ6 w/m2 ?; what is the sound intensity level of a sound with an intensity of 3.2ร10โ6 w/m2 ?; what is the sound intensity level of a sound with an intensity of 3.6ร10โ6 w/m2 ?; from a distance of 4.0 m, a bystander listens to a jackhammer breaking concrete.; an opera singer in a convertible sings a note at 600 hz while cruising down the highway at 90km hr

n = number of stops

c = change in exposure

n = log₂ C ..........(1)

A. Let n be no of stops needed to triple the exposure then n₁ = log(30) = n, log, 3+ log, C ..............(2)

We see using (1) in (2) n₁ = n + log 3 = n+1.5850

Thus we need to increase no. of stops by 1.585 ≈ 1.6.

B. Similarly to get exposure, changing c by c/5

n₁ = log₂ (45) = n₁ = log₂c - log₂5

n₁ = n - log₂5 = n₁ -2.3219

One needs to decrease the no. of stops by 2.3219.

Aperture is one of three camera settings that control the exposure of your image. These settings are collectively known as the exposure triangle and consist of shutter speed aperture and ISO. The aperture controls exposure by increasing or decreasing the relative amount of light entering the camera lens.

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the width of the first-order rainbow on a screen 2.0 m behind the grating is Δy=0.431m

Finding the angle from a diffraction grating with split space d is necessary to get the fringe location ym.

dSinα=mλ

Slit spacing for a grating with N slits or lines per mm is

d=1/N

d=(1/600mm)

d=1.67×10⁻³mm

At a wavelength of 400 nm:

α=Sin⁻¹(mλ/d)

α=13.9°

The first order lowest wavelength fringe is located in the following location on the screen:

y1= Ltanα

y1=.49445m

For 700nm wavelength:

α=Sin⁻¹(mλ/d)

α=24.8°

The first order highest wavelength fringe is located in the following location on the screen:

y2= Ltanα

y2= .99255m

The first order lowest and highest wavelength fringe's difference is

Δy=(0.925595 - 0.49445)m

Δy=0.431m

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Saturn's Atmosphere :-Proportionally less helium, Thinner Atmosphere, Most colorful in visible light, Composed of hydrogen and helium.

Jupiter's Atmosphere :- Oval stroma systems, Differential Rotation, Fewer observers features in light.

Electromagnetic radiation that the human eye can see is referred to as light or visible light. Typically, visible light is characterized as having wavelengths in the 400–700 nanometer (nm) range, which corresponds to frequencies of 750–420 terahertz, lying between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths) (with shorter wavelengths).

In physics, the term visible light" can more widely be used to refer to electromagnetic radiation of any wavelength, whether or not it is visible.

This definition of light includes gamma rays, X-rays, microwaves, and radio waves. The main characteristics of light include intensity, polarization, frequency or wavelength spectrum, and propagation direction. One of nature's basic constants is the speed of light in a vacuum, which is 299 792 458 meters per second (m/s). Visible light travels through space by, like all forms of electromagnetic energy,

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The initial velocity of the cue ball is 0.92v.

Initial velocity is the velocity of an object at the beginning of its motion. It is the speed and direction of an object at the start of its motion and is used to determine the final velocity of the object. Initial velocity is also used to calculate acceleration and displacement.

cue ball can be calculated using the conservation of momentum formula, which states that the total momentum of a system before a collision is equal to the total momentum after the collision. Using the given data, the initial velocity of the cue ball can be calculated as follows:

Pbefore = Pafter

m1v1 + m2v2 = (m1+m2)v

m1v1 + 0.2v2 = (1.2 + 0.2)v

v1 = 1.2v - 0.2v2

v1 = 1.2v - 0.2(1.4)

v1 = 1.2v - 0.28

v1 = 0.92v

Therefore, the initial velocity of the cue ball is 0.92v.

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circuit diagram

this is a circuit diagram

The supply's output must have some sort of switching converter and must be electrically insulated from the source. Throughout the whole range of input voltages and frequencies, the system is to apply a feedback control to ensure proper output voltage.

Voltage, also referred to as electric tension, electric pressure, or (electric) potential difference, is the difference in electric potential between two places. It is equivalent to the labor required to transfer a test charge between two places in a static electric field. The derived unit for voltage in the metric system is referred to as a volt. One volt equals one joule (of work) for one coulomb, which is how to work per unit charge is defined in SI units (of charge). Power and current were employed in the earlier SI definition for the volt; starting in 1990, the quantum Hall and Josephson effect was applied; and most recently (as of 2019), fundamental physical constants were added to the definitions of all SI units and their derivative units.

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Weber (Wb) and tesla meter squared (Tm2), which is called after German scientist Wilhelm Weber, is the SI unit for magnetic flux.

Using Faraday's law, it is possible to determine the size of the induced emf.The long coil's magnetic field has the formula B = 0(N/l)I.NBA = 0(N2/l)IA is the flow through the coil.

Emf=Nt is the equation for the induced emf brought on by an change in magnetic flux.Faraday's law of duction is the name given to this connection.Volts are used as usual as the emf measurement units.

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The required length and compressed length of the spring at the given force values are 13 cm and 8 cm respectively.

Explanation:

F = ke

k = spring constant ;

e = extension;

e = (Final length - Initial length)

Initial length, l = 10

Final length = L1 = 11

F = k(11 - 10)

F = k;

Length for a restoring force of 3F ;

3F = k(Final length - Initial length)

k = F

3F = F(L1 - 10)

3F = - 10F + F(L1)

F(L1) = 3F + 10F

F(L1) = 13F

L1 = 13

Hence, required length ls 13 cm

B.)

Let compressed length = c

2F = F(initial length - compressed length)

2F = F(10 - c)

2F = 10F - F(c)

F(c) = 10F - 2F

F(c) = 8F

c = 8F / F

c = 8 cm

Therefore, the required compressed length ls 8 cm

Spring:

A spring is an elastic body that stores mechanical energy. Coil springs are often used in daily life, but there are many different types of springs. Modern quills are usually made of spring steel, but non-metallic items like bows are also quills.

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Answer:

Below

Explanation:

1) Gravity force =~  m1 m2 / r^2     now   half the radius

                         = m1 m2 / ( 1/2r)^2 = 1/4  m1m2/r^2     so the force will be 1/4

                                            625 * 1/4 = 156.25 N

2)  mass does not change..it is a measure of the amount of mass an object has  .... it will still be 95 kg

The term which is called as mechanical weathering always refers to the changes in a rock which are physical and there is no or very little chemical change. So, it's True.

Mechanical weathering (additionally known as bodily weathering) breaks rock into smaller portions. These smaller portions are similar to the larger rock, simply smaller. That means the rock has modified bodily with out converting its composition. Mechanical weathering is likewise called bodily weathering. In this kind of weathering, a huge rock is disintegrated into smaller portions of rocks.

When rocks crumble or split with out experiencing any alternate of their chemical composition, it's far called mechanical weathering. The assertion approximately mechanical weathering that isn't genuine is includes a chief alternate withinside the mineral composition of the weathered material. Mechanical weathering breaks rocks down into smaller fragments, and will increase the floor location of the over all material. By growing the floor location, chemical strategies may also act extra without problems upon the rock floor.

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Jose uses his cellphone as a stopwatch, he records the time it takes for ten waves to crash to his feet therefore the waves characteristics which he is measuring is referred to as the frequency and is denoted as option A.

This is referred to as a disturbance or variation that transfers energy progressively from point to point in a medium without the actual movement of the molecules.

Frequency on the other hand is referred to as the number of waves that pass a fixed point in a given amount of time and its unit is Hertz which is therefore the reason why it was chosen as the correct choice.

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The distance of the screen is 107.7 meter.

When two coherent light waves from separate sources collide, the energy distribution caused by the first wave is altered by the second. The term "interference of light" refers to this alteration in the distribution of light energy brought on by the superposition of two light waves.

Given that: wavelength of light: λ = 650 nm = 650×10⁻⁷ cm.

separation between two slits: d = 0.21 mm = 0.021 cm.

According to fig. separation between two bright fringe: x = 1/3 cm

Now, from x = λD/d we get:

separation  between the screen and the slits: D = xd/λ.

= (1/3× 0.021)/ 650×10⁻⁷ m

= 107.7 meter.

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Angular Momentum = Angular velocity * Moment of Inertia

[tex](L=I\cdot \omega)[/tex]

[tex]Angular velocity = \omega = \frac{2 \pi}{T} = \frac{2 \pi}{24 \cdot 60 \cdot 60 sec}=\frac{\pi}{12\cdot 3600} rads/sec[/math][/tex]

[tex]Moment of inertia of a uniform sphere = \frac{2}{5}Mr^2\\ = \frac{2}{5}5.972 \times 10^{24} kg \cdot (6.371\times 10^6 m)^2[/tex]

Angular Momentum of Earth rotating on its axis (assuming that Earth is a solid sphere with its mass distributed evenly):

[tex]L=I\cdot \omega= \frac{\pi}{12\cdot 3600} rads/sec \cdot \frac{2}{5}5.972 \times 10^{24} kg \cdot (6.371\times 10^6 m)^2=\frac{\pi\cdot 2\cdot 5.972 \times 10^{24} \cdot(6.371\times 10^6)^2}{12\cdot 3600\cdot 5} kg m^2 / s = 7.051\times 10^{33} kg m^2 / s[/tex]

What is angular momentum?

The rotating equivalent of linear momentum in physics is called angular momentum. Because it is a conserved quantity—the total angular momentum of a closed system stays constant—it is a significant physical quantity. Both the direction and the amplitude of angular momentum are conserved.

Hence, the answer is [tex]7.051\times 10^{33} kg m^2 / s[/tex]

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a)When the metal ball leaves the tray, the tray will be 10.78 cm above point A.

b) The total time between the system being released at point A and the ball leaving the tray is 0.086 seconds.

c) The speed of the ball as it exits the tray is 1.175 m/s.

Given,

Mass of tray , m_t=1.90 kg

spring of force constant, k = 200N/m

mass of the ball, m_b = 300 g

Height below the equilibrium point A = 16.4 cm

a)

The tray's height above point A when the metal ball leaves it- The total mass of the tray and ball is 2.2 kg (1.90kg+0.3 kg). The spring force is equal to the product of the spring constant and displacement.Thus,

f=kx

but we know that, f=mg

equating both the equations

[tex]mg=kx\\\\2.2*9.8=200*x\\\\21.56=200x\\\\x=\frac{21.56}{200}\\\\x=0.1078 m=10.78 cm[/tex]

As a result, the tray is pushed down 17.4 cm below its equilibrium point (point A) and released from rest. Thus, the tray's position above point A is h=16.4+10.78=27.18 cm.

b)

The total amount of time that passes between releasing the system at point A and the ball leaving the tray.

The formula for the simple harmonic function of a spring is as follows:

[tex]y=Acos(\sqrt{\frac{k}{m}}-\phi)[/tex]

Here,

y= displacement = 10.78 cm

A=amplitude i.e 16.4 cm

k= spring constant = 200 N/m

m= total mass = 2.2 kg

and [tex]\phi = 0 \degree[/tex]

[tex]10.78=16.4cos(\sqrt{\frac{200}{2.2}}t-0)\\\\\frac{10.78}{16.4}=cos(\sqrt{90.909}t)\\\\0.657=cos(9.534t)\\\\cos^{-1}(0.657)=9.5434t\\\\0.829=9.543 t\\t=\frac{0.829}{9.543}\\\\t=0.086 s[/tex]

c)

The speed at which the ball moves as it exits the tray

The total mechanical energy for simple harmonic motion of a spring can be given as,Here, take the distance measurements in meters

[tex]\frac{1}{2}mv_y^2+\frac{1}{2}ky^2=\frac{1}{2}kA^2\\\\v_y^2=k\frac{A^2-y^2}{m}\\\\v_y^2=200*\frac{0.164^2-0.1078^2}{2.2}\\\\v_y^2=90.909(0.0268-0.0116)\\\\v_y^2=1.38\\\\v_y=1.175 m/s[/tex]

Thus, the speed of ball is 1.175 m/s

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Ao for a maraging steel (82 M Nm-, C= 0.15 10-11, m-41) is equal to 58.2*10^-6m, and for a medium-strength steel, it is 40.6*10^-6m (50 MN m1, C0.24x 10-", m 3.3). The second case can be more tolerant.

Ultra-high-strength steel alloys, or maraging steels, are a unique class of low-carbon steel that have comparable ductility while being stronger and tougher than most other steels. A structure's capacity to safely withstand  until repair can be made is known as damage tolerance. Based on the presumption that defects can exist in any building and that these problems spread with use, the approach to engineering design that takes damage tolerance into account.

9125 is equal to 2/c(1/stress)*pi1/2(2-m) (Afinal - A)

Ao = 58.2*10^-6m

9125 is equal to 2/c(1/stress)*pi1/2(2-m) (Afinal - Ao)

comparable to case two

Ao = 40.6*10^-6m

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Answer:

Below

Explanation:

You will need a hose with double the cross sectional area

 Area = pi r^2    

          pi * (1.5)^2 = 2.25 pi

  now double it to 4.5 pi and solve for r

           4.5 pi = pi r^2

             4.5 = r^2     r = 2.12 cm radius

2.12 - 1.5 = the hose radius should be increased .621 cm

                      this would be .621 * 2 = 1.24 cm wider

The final velocity, 2v in the positive y direction, is 2.24mv/F. The final velocity is in terms of mass, velocity, and force.

Given:

Initial velocity, Vi

Final velocity, Vf = 2v

Mass, m

Acceleration, a

The force is given by:

F=ma

The direction of force is in y direction and the acceleration is given by:

a=Fcosθ/m

From th first equation of motion:

Vf=Vi + at

The initial velocity is zero. Therefore, the final velocity is:

2v=0+ (Fcosθ/m)(t)

2mv / (Fcosθ) = t

If theta is equal to 26.6 degrees.

The final velocity is:
v = 2.24mv/F

Hence. the final velocity, 2v in the positive y direction, is 2.24mv/F. The final velocity is in terms of mass, velocity, and force.

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the rate at which the entropy of the two reservoirs changes is 0.004081 KW/K

Yes, the second law is satisfied.

claculation :

ΔS = Q/T (entropy formula)

ΔS1 = 2/300 = 0.006667 KW/K

ΔS2 = 2/715 = 0.002580

Δs = 0.006667 - 0.002580

Δs = 0.004081 KW/K

Yes, the second law is satisfied.

Entropy is a scientific concept and a measurable physical property most commonly associated with states of disorder, randomness, or uncertainty. The term and concept are used in a variety of fields, from classical thermodynamics, where it was first recognized, to microscopic descriptions of nature in statistical physics, to principles of information theory. It finds a wide range of applications in information systems, including information transmission in chemistry and physics, the relationship between biological systems and life, cosmology, economics, sociology, weather science, climate change, and communications.

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CB =7 KN , Since CA > Cg bearing A can carry the larger load.

In order to compare the bearings, both bearings need to be rated in

terms of same catalog rating.

Calculation :

Calculate basic load rating for bearing A for one million

revolutions.

CA = FA[tex](\frac{LA}{LR} )^{1/a}[/tex]

     = [tex]2(\frac{3000*500*60}{10^{6} } )^{1/3}[/tex]

    = 8.96kN

Bearing B already is rated at one million revolutions, CB =7 KN

Since CA > Cg bearing A can carry the larger load.

Bearings are mechanical elements that limit relative motion to a desired degree and reduce friction between moving parts. The bearing design can, for example, provide free linear motion of the moving part or free rotation about a fixed axis. Alternatively, movement can be prevented by controlling the normal force vector acting on the moving part. Most bearings facilitate the necessary movement by minimizing friction. Bearings are broadly classified according to the type of motion, permissible motion, and the direction of load (force) applied to parts.

Slewing bearings support rotating components such as shafts and axles in mechanical systems, transferring axial and radial loads from the load source to the supporting structure. Plain bearings, the simplest type of bearing, consist of a shaft that rotates in a bore.

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Answer: 22.63 m/s

Explanation:

Not sure if this is the right answer.

[tex]\frac{1}{2} m(v)^2=2(\frac{1}{2} m(16)^2 )[/tex]

[tex]\frac{1}{2} (v)^2=(16)^2[/tex]

[tex]v = 22.63 \frac{m}{s}[/tex]

These two dark fringes will travel in closer proximity if the slit's width is increased for a Constants A film has just one a-width tiny slit. When this slit is open, monochromatic light enters.

The relationship between the slit width and the distance from the centre maximum to y is (m*(lamda)*D/a, where D is the separation between the slit and the screen and lamda is the wavelength of light, meaning that y is inversely proportional to 1/a. Therefore, monochromatic light is simply light of a single colour. It denotes light that has only one wavelength in scientific terminology. The term "light" refers to the visible and near-visible components of electromagnetic radiation. It is made up of propagating, perpendicularly oscillating sinusoidal waves in the magnetic and electric fields.

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The free-body diagram that could represent the forces exerted on block Y is upward tension force due to block X and downward tension force due to block block Z and its own weight.

option D is the correct answer.

A free-body diagram is a sketch of all the forces acting on the given object with all the surrounding objects stripped away and all of the forces acting on the body shown in their respective direction.

For the three identical blocks, X, Y, and Z, hang up from identical strings, as shown in the figure, the following are the direction of the forces acting on the string.

weight of block X -----> acting downwards

weight of block Y ------> acting downwards

weight of block Z ------> acting downwards

According to Newton's third law of motion, acting and reaction are equal and opposite.

As the weight of the blocks are acting downwards, the tension in the rope supporting the weights will be acting upwards.

The total weights of the = downward force of gravity

The tension in the string = upward tension force

The free body diagram is sketched as;

                                           ↑  F (Tension Up)

                                           Ф

                                          ↓  ↓ F (Gravity) + F (tension down)

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Thrust, drag, lift, and weight is the forces that act on all aircraft in flight.

Thrust is the forward force produced by the propulsion unit/propeller or rotor.

Drag is the backward force caused by the disturbance of airflow by the wing, rotor, fuselage, and other objects.

When the plane is flying at a constant height, the force of thrust must equal the opposite force of drag, then only the airplane can experience uniform motion in one direction.

All four forces act on an airplane must equate to each other for an airplane to fly straight and level at a constant speed, the lift it creates balances its weight, and the thrust it creates balances its drag.

An unbalanced force changes the equilibrium state of a body. As with an aircraft cruising in level flight, the weight of the aircraft will equally lift and thrust will equal drag. So, the plane experiences a balanced force.

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The magnitude of its average velocity can never be greater than its average speed. It is true .

The change in position or displacement (x) divided by the time intervals (t) during which the displacement happens is the definition of average velocity. Based on the direction of the displacement, the average velocity might either be positive or negative. Meters per second (m/s or ms-1) is the SI measure for average velocity.

An object's average velocity (v) is equal to the sum of its starting and final velocities (u), divided by two.

The average velocity of an object is its displacement over time. We divide the distance travelled by the amount of time to determine an object's average speed. We are aware that velocity is a vector quantity, and that dividing displacement by time yields the average velocity.

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The floor's force on the block, measured in terms of its vertical component, is expressed as follows: mg- t sin theta

The resistive friction force (Fr) multiplied by the normal or horizontal force (N) forcing the objects together yields the coefficient of friction (fr), which is a numerical value. It can be represented by the equation fr = Fr/N.

A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the things. Newton(N) F=ma stands for the Si system of force.

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Thus, the baseball's momentum is measured as 6.3kg/m/s (6.3 kg/m/s).

What is the size of the average force the ball applies to the bat?

The average force acting during the bat-ball collision is therefore about two tons, with a peak force of nearly four tons, during the 0.7 millisecond contact time. There's a lot of force there.

What is the connection between collision and momentum?

During collisions between objects, momentum is a relevant concept. The total momentum before a collision between two objects equals the total momentum after the impact (in the absence of external forces). The law of conservation of momentum is this. It holds true in every collision.

What is the system's momentum following the collision?

The total momentum of two objects does not change when they collide. The sum of the individual momenta of the objects, both before and after the collision, is the total momentum. The product of an object's mass and velocity, expressed in kilogram meters per second, determines its momentum.

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Excess capacity becomes more desirable when the opportunity cost of lost income is considerable.

Income is a concept that is difficult to define conceptually and may vary across fields. For instance, a person's income in an economic sense may differ from their income as defined by law. Income is the consumption and saving opportunity gained by an entity within a specific timeframe, which is typically expressed in monetary terms.

Haig-Simons income, which defines income as Consumption + Change in Net Worth and is commonly applied in economics, provides an incredibly significant definition of income.

For households and individuals in the United States, income is defined by tax law as a sum that includes any wages, salaries, profits, interest payments, rent, or another type of earnings earned in a calendar year. Discretionary income is frequently described as gross income fewer taxes and expenses.

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Excess capacity becomes more desirable when the opportunity cost of lost income is considerable.

opportunity costs represent the potential benefits that an individual, investor, or business misses out on when choosing one alternative over other. because opportunity costs are unseen by definition, they can be easily overlooked. The value of the next highest valued alternative use of that resource.  opportunity cost is a strictly internal cost used for strategic contemplation. The opportunity cost theory analyses pre trade and post trade situations under constant, increasing and decreasing. it is defined as the amount of a second commodity.

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The goal of behavior modification is to change clients' maladaptive or undesirable behaviors. Behavior modification is a psychological treatment approach that focuses on changing problematic behaviors by reinforcing desirable behaviors and reducing the reinforcement of undesirable behaviors. It involves identifying the specific behaviors that need to be modified, setting goals for behavior change, and using techniques such as positive reinforcement, punishment, and extinction to modify the behaviors. The goal of behavior modification is not to repair troubled or broken relationships, unearth the origin of maladaptive behavior, or modify the clients' personality structure. These may be addressed as part of the treatment process, but they are not the primary focus of behavior modification.

Since electromagnetic moves in waves, it all moves through such a vacuum at a pace of around 3.0 * 108 metres per second.

Coils of metal with electricity running through them make up electromagnets. An electromagnet's wire coils act like magnets when an electric current runs through them because moving charges produce electric flux.

Microwaves, microwaves, heat, visible light, violet, x-rays, and gamma rays are all examples of radio energy. Electromagnetic waves have the least frequency, amplitude, and height.. Gamma rays are the most potent, common, and short-spectrum photons.

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The pipe will be 40.1 meter  if the barrel is not to rupture.

The pressure exerted by a fluid at equilibrium at any point due to the force of gravity is known as fluid pressure.

Given that: fluid pressure is: p = 350 kPa = 350 * 1000 Pa = 350000 Pa.

Density of fluid is: ρ = 890 kg/m^3.

Let the height of the pipe is h.

Hence, from the formula of  P = hρg we get: the height of the pipe is:

h = P/ρg

= 350000/(890×9.8) m

= 40.1 meter.

So, the pipe is 40.1 m long.

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