or  IF we use object and compress spring this same distance (x Show
Potential Energy Object in motion -- has kinetic energy. With or without motion, objects can have Potential Energy -- "potential to do work". Examples: Object (Mass) at top of a building Mass pushed up against Compressed Spring Water behind a dam A drawn bow For mechanical systems -- best to think of this type of energy as "energy of position". For spring, we do work compressing the spring -- once compressed, spring ready to deliver the energy back by accelerating a mass and giving it KE. When you compress the spring a distance x, the work done to compress the spring = Gravity is a conservative force, also. Work done in lifting mass m a distance h = W = mgh. Therefore, for h > 0, U = W = mgh.So Gravitational Potential Energy (in vicinity of Earth’s Surface) is U = mgh = mgy (up +)Suppose you throw a ball straight up with velocity v = 0. Know that:REMEMBER: holds for going up and going down!!!! MULTIPLY BY
Rearrange: The change in the potential energy = change in KE. Gives |v| for any allowed y. (Max y occurs when v = 0: Another form of Eq. (1): U SUM = Total Mechanical Energy = E HOLDS FOR ALL CONSERVATIVE FORCES. "initial" is whenever you start the problem, "final" is whenever you want an answer. NOTE that if y , i.e., come back to where you started, E the same, independent of path.Nonconservative forces - E depends on path. Best example is frictional forces. You do work against them, but you can’t get it back (goes into heat). Conservative: U + Q(heat)Q represents lost mechanical energy; if we include, Energy still conserved. Suppose you throw three balls of equal mass m off a cliff with the same speed, v , but at three angles relative to the horizontal shown in figure: 0°, ±45°. Which ball, 1, 2, or 3 strikes the ground (distance h below) with the greatest speed? Neglect air resistance.
Answer: They all hit the ground with the same speed. In all three cases, at throw, Therefore, Could be all different mass; same result. Skier with Friction A skier of mass 80 kg starts from rest down a slope where y = 110 m. The speed of the skier at the bottom of the slope is 20 m/s.
(a) Show that the system is nonconservative. Given m, v , system lost energy -- non-conservative.(b) How much work is done by the non-conservative force? Q = E J (roughly 80% lost to heating up the snow).Conservation of Energy holds for conversion between all types of energy: mechanical, electrical, thermal, nuclear, chemical. On microscopic / submicroscopic levels -- these forms of energy are describable by kinetic and potential energy. E.g., energy of chemical bond consists of the motion KE, attractive and repulsive forces (therefore PE) from electrons and nuclei. In nuclear reactions -- must take into account that mass actually can be converted to energy: , Einstein’s famous equation.Driver’s Training Speed of a car increased by 50%. By what factor will minimum braking distance be increased (ignore reaction time)?
Asked By: Jake Walker Date: created: Aug 29 2021 Answered By: Michael Phillips Date: created: Aug 29 2021 Braking forcesHowever, the braking distance increases four times each time the starting speed doubles. This is because the work done in bringing a car to rest means removing all of its kinetic energy.Work done = kinetic energy.Work done = braking force × distance.. Asked By: Reginald Barnes Date: created: Aug 12 2021 What happens when two forces act on an objectAnswered By: Hunter Washington Date: created: Aug 13 2021 When more than one force acts on an object, the forces combine to form a net force. The combination of all the forces acting on an object is the net force. … If two forces of equal strength act on an object in opposite directions, the forces will cancel, resulting in a net force of zero and no movement. Asked By: Tyler Russell Date: created: Feb 09 2022 What if I push an object which is already moving horizontallyAnswered By: Cameron Hayes Date: created: Feb 12 2022 Thus, force would cause. acceleration in horizontal motion. Asked By: Henry Torres Date: created: Dec 29 2021 Why do objects eventually stop movingAnswered By: Nathan Rogers Date: created: Dec 31 2021 The force that brings nearly everything to a stop is friction,which is the force that acts to resist sliding between two touch- ing surfaces, as shown in Figure 3. Friction is why you never see objects moving with constant velocity unless a net force is applied. Asked By: Peter Scott Date: created: Feb 20 2021 Will the object move by itselfAnswered By: Lewis Jackson Date: created: Feb 22 2021 Objects do not move on their own. If they are in motion they were initially moved by a force, either from their initial development as an object or by an outside force that initially moved them to motion. … Particles always vibrate and spin without the need of any outside force. Asked By: Logan Cox Date: created: Apr 23 2021 What is required to cause accelerationAnswered By: David Lee Date: created: Apr 24 2021 the rate of change of velocity is called as acceleration . so , change in velocity is required to form acceleration. and unbalanced forces also cause to form acceleration. Asked By: Connor Bailey Date: created: Aug 07 2021 How do you calculate the force of a moving objectAnswered By: Hunter Kelly Date: created: Aug 08 2021 The force (F) required to move an object of mass (m) with an acceleration (a) is given by the formula F = m x a. So, force = mass multiplied by acceleration. Asked By: Antonio Brown Date: created: Apr 07 2021 What two forces help stop a moving objectAnswered By: Fred Jenkins Date: created: Apr 09 2021 Unbalanced forces cause an object to start moving, stop moving, or change direction. Unbalanced forces acting on an object will change the object’s motion. Unbalanced forces can also stop a moving object. The three main forces that stop moving objects are friction, gravity and wind resistance. Asked By: Mason Morris Date: created: Feb 28 2022 What makes an object stay in placeAnswered By: Louis Barnes Date: created: Feb 28 2022 Answer Expert Verified Newton’s inertia states that an object stays at rest unless acted upon an imbalanced force. Therefore, objects stay in place, because the forces acting on that object are balanced or the sum of the forces is equal to 0. Asked By: Reginald Patterson Date: created: Nov 04 2021 How much force is required to stop a busAnswered By: Juan Gray Date: created: Nov 07 2021 Force used to stop the bus = mass of the bus in kg× deceleration = 5000 kg× – 2 m/s² = – 10,000 N. The minus sign implies force is supplied by the decelerating agency. Asked By: Peter Ross Date: created: Mar 25 2022 Why does it take a larger force to stop a vehicle moving fasterAnswered By: Carlos Butler Date: created: Mar 26 2022 A heavier vehicle means more mass, which means more momentum which equals a longer stopping distance. In other words heavier/faster vehicles will have a harder time slowing down. Stopping distance relates to momentum and friction. High momentum and low friction equals a longer stopping distance. Asked By: Norman Hernandez Date: created: Dec 17 2021 Does it take a stronger force to slow something downAnswered By: Patrick Wilson Date: created: Dec 20 2021 When a force pushes or pulls the object, the object will move in the direction of the force. The bigger the force, and the lighter the object, the greater the acceleration. It can also make something slow down, speed up or change direction. Asked By: David Adams Date: created: Feb 22 2021 What is natural state of an objectAnswered By: Miguel Morgan Date: created: Feb 24 2021 Objects do not change motion without unbalanced force. Objects in motion do not always require a force to keep them moving. Objects have two “natural” states of motion, at rest (static equilibrium) and moving at a constant speed and direction (dynamic equilibrium). Asked By: Christopher Perry Date: created: Jul 06 2021 How much force is needed to keep an object moving at a constant velocityAnswered By: Joseph Bryant Date: created: Jul 09 2021 Newton’s law states quite the opposite; no force is needed to maintain a constant velocity. Forces produce a change in velocity not the velocity itself. If all external forces are balanced and the velocity is zero, then the object remains at rest. Asked By: Martin Phillips Date: created: Apr 09 2022 What force is needed to stop a moving objectAnswered By: Geoffrey Perez Date: created: Apr 09 2022 FrictionFriction is a force that slows or stops motion. Friction is the resistance to motion created by two objects rubbing against each other (the sled and the snow, for instance). Even air causes friction. Asked By: Gavin Wood Date: created: Jul 16 2021 Can a force stop a moving objectAnswered By: Gilbert Cox Date: created: Jul 19 2021 If an object is moving and there is an applied force in the opposite direction of the motion, the object will decelerate or slow down. If you throw a ball up at a given velocity, it will slow down as it travels upward due to the force of gravity. … A decelerating force can cause a moving object to stop. Asked By: Devin Butler Date: created: Mar 05 2021 What force is required for a vehicle to stopAnswered By: Raymond Evans Date: created: Mar 08 2021 The force needed to stop the car in 50 metres is 5,000 N. Asked By: Alexander Lee Date: created: Jan 10 2021 What happens when two objects collideAnswered By: Geoffrey Diaz Date: created: Jan 12 2021 Newton’s third law of motion is naturally applied to collisions between two objects. In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction. Such forces often cause one object to speed up (gain momentum) and the other object to slow down (lose momentum). Asked By: Herbert Morris Date: created: May 14 2022 When you push or pull something you are creatingAnswered By: Jesus Campbell Date: created: May 14 2022 Force is a push or a pull of an object that causes the object to speed up, slow down, or stay in one place. In other words, a force is what causes an object to move. Friction and gravity are two types of forces that influence how an object moves. Asked By: Evan Cox Date: created: Mar 22 2021 Why do we need force to move an objectAnswered By: Dylan Wright Date: created: Mar 22 2021 Force and Motion Forces cause all motions. Everytime the motion of an object changes, it’s because a force has been applied to it. Force can cause a stationary object to start moving or a moving object to change its speed or direction or both. A change in the speed or direction of an object is called acceleration. Asked By: Jordan Taylor Date: created: Jun 08 2021 Who said that a force is not needed to keep an object movingAnswered By: Eric Allen Date: created: Jun 09 2021 NewtonBy the time Newton came along, the prevailing theory of motion—formulated by Aristotle—was nearly two thousand years old. It stated that if an object is moving, some sort of force is required to keep it moving. Unless that moving thing is being pushed or pulled, it will simply slow down or stop. Do electric cars need oil? Electric cars do not need motor oil as they don't have the conventional internal combustion engine with all the moving parts....Plug-in hybrids (and hybrids) still require traditional maintenance as they still employ an ICE in combination with an electric motor to increase efficiency.. What type of engine does an electric car have? All-electric vehicles (EVs), also referred to as battery electric vehicles, have an electric motor instead of an internal combustion engine. Which motor is more powerful AC or DC? AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy. Which motor is best for Electric Car? Brushless DC Motors BLDC motors have traction characteristics like high starting torque, high efficiency around 95-98%, etc. BLDC motors… Professional What is considered proper etiquette in Ireland? Irish will usually queue in a line and wait their turn to be served.In a social setting, it is polite to shake hands with people when you first see them and again when you are leaving.When driving in rural areas, it is proper etiquette to acknowledge other drivers.. What can you not do in Ireland? 13 Things Tourists Should Never Do in IrelandSay it's part of the British Isles.Generally be insensitive to the country's troubled history.Smoke indoors.Butcher the Irish language.Fail to get a round in.Complain about the weather.Be obsessed with leprechauns.Call it 'St. Patty's Day'More items... What should you not say or do in Ireland? What Not to Do in Ireland: 10 Things to Avoid#1: Neglect to pay your round at the pub.#2: Ignore Irish driving rules and common courtesies.#3: Brag about being “Irish”#4: Say that Ireland is part of the United Kingdom.#5:… Professional Which is better torque at low rpm or torque at high rpm? Running at lower RPMs equates to higher torque and thus lower horsepower, while making higher RPM power outputs less torque and higher top horsepower.. How do I get low end torque? How to Increase Low End Torque?Change the flowing exhausts and intake systems. Replace these components with a new one if you find any damage. ... Install some high-quality spark plugs. ... Replace the ignition lead with a better one. ... Retune the air/fuel ratio (AFR) and the ignition timing maps.Apr 23, 2018 Is current proportional to torque? The current in the output of a DC drive is the motor armature current, which is proportional to torque. What causes poor acceleration? There are many reasons why your vehicle may be losing power, especially when accelerating. Some of these common causes are: Mechanical problems such as: Low compression, clogged… Professional Can number 7 plastic go in the dishwasher? In general, the most common plastic that is used for food storage lids and containers is polypropylene, which is top rack safe and can be run in the dishwasher....Plastic materials that have recycling codes 3, 6, and 7 - corresponding to phthalates, styrene, and bisphenols, respectively - should also be avoided.. Which plastic numbers are safe? To summarize, plastics in categories #2, #4 and #5 are generally considered safe. Be weary of putting them in the microwave, even if they are labeled “microwave-safe”. Plastics #1, #3, #6 and #7 should be used with varying to extreme caution, especially around food or drink. Is drinking plastic 7 safe? Number 7 plastics are used to make baby bottles, sippy cups, water cooler bottles and car parts. BPA is found in polycarbonate plastic food containers often marked on the bottom with the letters “PC” by… Professional Why does neon glow reddish orange? While some electrons escape their atoms, others gain enough energy to become "excited"....So, each excited electron of an atom releases a characteristic wavelength of photon.In other words, each excited noble gas releases a characteristic color of light.For neon, this is a reddish-orange light.. Are all true neon signs the same color? Every other colored "neon" sign is a bit misnamed. For most of the colors that you see in "neon" signs (the ones that are bent to spell out letters), almost all colors, including yellow, are produced indirectly. These "neon" signs are actually long fluorescent lamps. Do neon lights get hot? No. Neon is perfectly safe to the touch and will not burn you. When manufactured and installed correctly, neon will only ever run warm. The electrodes that are attached to each piece of neon tubing, that create the start and end point for… Guest What are plastic signs made of? Acrylic is made of a versatile plastic known as Plexiglas.Acrylic signs can be completely transparent, or come in a variety of colors.You can print directly on acrylic, or apply cut vinyl to it.Acrylic is relatively heavy and comes in a variety of thicknesses from 1/16″ to 1″ (U.S.Plastic Corp).. What material is used for banners? VinylVinyl. Vinyl is the most popular type of material for banners. Suitable for both indoor and outdoor use, it's a cost-effective option compared to others. The banner, which can measure from 16 feet by 50 feet without seams, is digitally printed on a 13 oz scrim, vinyl sheet. What is a coroplast sign? Well, the coroplast is a corrugated plastic signs sheet that is lightweight and extremely durable. ... It's tougher than corrugated fiberboard and lighter than plastic sheets. Coroplast signs are considered a great marketing tool! What kind… Guest Can anyone buy a billboard? Yes, nearly anyone can buy space on a billboard....This is why most billboard buyers use media agencies like DASH TWO to make buys for them.It's easier than doing it yourself.However, if you have a very limited budget or you simply want to do it yourself for kicks, you can purchase a billboard yourself.. How much are billboards worth? The classic billboards can cost as low as $250 per month, especially when they are in rural areas, and as much as $14,000 per month or more if they're located in midsize or large cities. Digital billboards are more expensive, coming in between $1,200 and $15,000 or more per month. How much does it cost to make a street sign? A stop sign costs about $50, and a neighborhood street sign is around $15 (depending on the length). How profitable is owning a billboard? Owning a billboard… Guest What is another word for molding? Molding Synonyms - WordHippo Thesaurus....What is another word for molding?castingcreatingmodelingUSshapingformingmanufacturesculpturesculptingcarvingsculping4 more rows. What's the difference between molding and Moulding? When it comes to moulding or molding, there is not much difference in the meaning – aside from the spelling. ... Moulding is the “Old World” version of the spelling and molding finds itself exclusive to usage in the United States among woodworkers and carpentry businesses. What are the types of Moulding? Types of Molding ProcessesCasting. Casting is a basic molding process as it requires the least amount of complex technology. ... Injection Molding. Injection molding is used for creating high-quality three-dimensional objects, that can be commercially reproduced. ... Blow Molding. ... Compression Molding. ... Rotational Molding. What is the use of Moulding? Use. At their simplest, moldings hide and help weather seal natural joints produced in the framing process of building a structure. As… Guest What is plastic machine? A plastic forming machine, or plastic molding machine, is developed on the basis of rubber machinery and metal die-casting machine....Blow molding is the third-largest plastic molding method after the injection molding and extrusion blow molding method, it is also the fastest development of plastic molding method.. What are the method of Moulding? The most popular techniques in plastic molding are rotational molding, injection molding, blow molding, compression molding, extrusion molding, and thermoforming. We'll cover all these techniques in this guide to help you discover the best process to make your part or product. What are types of casting? 10 types of casting process（1）Sand casting.（2）Investment casting.（3）Die casting.（4）Low pressure casting.（5）Centrifugal casting.（6）Gravity die casting.（7）Vacuum die casting.（8）Squeezing die casting.More items... What is head Moulding? Overview. During a head first birth, pressure on the head caused by the tight birth canal may 'mold' the head into an oblong rather than round… Guest How much does a signage cost? Signage costs $3,000, with a typical range of $500 to $5,000.Signs measuring five to 10 square feet with minimal electronics are $50 to $1,000.Larger styles with a freestanding structure in a monument, billboard or pylon and pole design measuring 20 to 700 square feet run up to $200,000.. How do you make an LED sign board? How to Make a Led Sign BoardStep 1: Things You Need :- Parts:- ... Tip Question Comment.Step 3: Carving in It. Now in this step u have to take tracing paper and draw an outline of the rectangle on it see photo (1) ... Step 4: Adding the Leds. ... Step 5: UPDATE 24/8/12. Why are neon signs red? The electrodes of each noble gas release a specific and characteristic wavelength of photons, which determines the colour the gas will shine in - neon for example glows red/orange.… Professor How does torque affect speed? Torque multiplied by rpm returns horsepower.Basically, the faster the crankshaft spins with the same amount of force, the more power an engine will make.A car with more hp than torque will always be quicker since this gives a car acceleration and speed.. Why does torque drop at high rpm? At high RPM, torque drops off primarily from intake and exhaust flow restriction. Volumetric Efficiency declines because the engine can't breathe any faster. Mechanical efficiency also declines at higher RPM, due to increased frictional resistance. This further reduces torque at the output. What is the benefit of higher torque? Benefits of torque Having high torque force as the engine rotation (RPM) increases makes transporting heavy loads far easier and more efficient. Easier for driving up steep inclines - Having extra torque is also what creates enough power to get a vehicle going from, particularly when moving… Professor Does VCarve work on Mac? I use VCarve on a mac with Parallels Desktop.You can install Windows free and it can run in the background so you dont even know its running.You can also use bootcamp to install for no cost at all, but requires a reboot to run.I also have VCarve Pro running on my Mac using Parallel and performance is good.. What is VCarve Pro USB media pack? VCarve Pro is a powerful and flexible software package that includes all the design, layout and machining functionality demanded by commercial shops and users, while remaining easy to use and affordably priced. This purchase also includes a free library of 3D Clipart. How much does VCarve pro cost? Single ProductsProductPrice*VCarve Pro$699 / £540 / €660BUY NOW >VCarve Desktop$349 / £275 / €330BUY NOW >Cut2D Pro$449 / £350 / €420BUY NOW >Cut2D Desktop$149 / £110 / €135BUY NOW >3 more rows… Professor What are backlit signs made of? adhesive vinylMade from 3.5 mil adhesive vinyl, backlit decals are designed to withstand exposure to heat from light sources as well as indoor and outdoor elements.. How much are channel letter signs? How much does a channel letter sign cost on average on the market today? The average range of their price varies between $3,000 to $4,000. What are channel letters signs? Channel letters are custom-made metal or plastic letters commonly used in exterior signage on public and commercial buildings, and often internally illuminated. Unlit three dimensional letters that are applied to sign panels or monuments are usually referred to as dimensional letters. How much is a marquee sign? An average church marquee sign can cost you anywhere from $5,000.00 to $10,000.00 depending on the size you'll need to be effective for viewers on the road. How much are outdoor LED signs? The average… Professor How do you increase the torque of a motor? To increase the torque ...that a bit harder.All you can do, electrically (as you can do it mechanically via gears), is to reduce the source impedance to maximise the current that can be delivered for a given stator impedance.Rewind it with more turns of thinner wire.. Does higher torque mean faster acceleration? A car with more hp than torque will always be quicker since this gives a car acceleration and speed. ... Higher torque doesn't mean one vehicle will necessarily be faster than another, though. For example, a Ford F-250 makes 925 lb-ft of torque, while a Honda S2000 has just 162 lb-ft. How many ft lbs is 1 HP? 550 ft lbf1 Horsepower (Imperial Mechanical): 550 ft lbf/s. What horsepower is 5252? One horsepower is equal to 33,000 foot-pounds of work per minute. Add in the equations relating to torque… Professor How much does aspire cost? Aspire pricing starts at $1000.00 per feature, per month.They do not have a free version.Aspire does not offer a free trial.. Can VCarve pro do 3D? Re: Vcarve Pro and 3d questions Cut3D cannot create models. It's purely a toolpath generator. If you want to create models from 2D images you need Aspire. Is VCarve free? If you've considered getting into CNC work, but wondered how complex VCarve Pro might be to use, there's great news. You can test the software on your own computer, for free. Is VCarve worth the money? Rob, I agree with Bob, VCarve Pro is definitely worth the investment and will pay for itself real quick. The preview function is very valuable and the ability to print a design for a customer to approve before machining is a huge benefit. VCP will get you up and making signs faster than… User What material is used for backlit signs? Backlit paperBacklit paper is thin and inexpensive, making it a preferred choice for things like bus shelters and other short-term signage.Thin translucent plastic sheets such as styrene or polypropylene can make very durable outdoor backlit signage like transit signs, theatres, mall displays, etc.. What is backlit printing? Backlit prints turn a normal window graphic into a vibrant and eye-catching display. Printed on specialized translucent media that provides rich, vibrant colors, this display instantly makes your message pop in high or low-visibility environments. What is backlit vinyl? Backlit vinyl is specially engineered to be translucent. While your initial instincts have you picturing this material as difficult to see and even washed out, the opposite is true. What are channel letters signs? Channel letters are custom-made metal or plastic letters commonly used in exterior signage on public and commercial buildings, and often internally illuminated. Unlit… User How much do advertising signs cost? The cost of billboard advertising depends on format, circulation, demographics, and impressions.Physical billboard costs average $750 to $1,500 per month in rural areas, $1,500 to $2,000 in small to midsize cities, and $14,000 and up in larger markets.. How much does an LED sign cost? Normally LED signs start around $15,000 to $50,000. However custom signs could be more. How profitable is owning a billboard? Owning a billboard provides large companies a regular income cash flow. The revenue generated by billboard companies may reach up to 40 to 50 percent before counting the depreciation, taxes, amortization and interest. The rate of income grows higher on highway billboards that may go higher as 60 percent of revenue. How much do stop signs cost? A stop sign costs about $50, and a neighborhood street sign is around $15 (depending on the length). But the cost of… User What is backlit light? A backlight is a form of illumination used in liquid crystal displays (LCDs).As LCDs do not produce light by themselves—unlike, for example, cathode ray tube (CRT) displays—they need illumination (ambient light or a special light source) to produce a visible image.. How much is a sign? Signage costs $3,000, with a typical range of $500 to $5,000. Signs measuring five to 10 square feet with minimal electronics are $50 to $1,000. Larger styles with a freestanding structure in a monument, billboard or pylon and pole design measuring 20 to 700 square feet run up to $200,000. What's the difference between backlit and lighted mirrors? Backlit mirrors have light bulbs behind the mirror, whereas lighted mirrors have the bulbs on top of or just underneath the glass surface. But this isn't the only difference between these two types of illuminated mirrors. Is edge lit better than backlit?… User Should I put crown molding in every room? Crown molding is a magnificent addition to any home.You may choose to add it to every room, only a few of your rooms, or even just one room, depending on your house's style and layout.. Does crown molding make a room look smaller? Crown molding does not make a room look smaller — in most instances. Whether it does or does not depends largely upon how high your ceilings are and how wide the molding is. If the room is small and has normal or low ceilings, a 2- to 4-inch-width molding is appropriate. What are the types of Moulding? Types of Molding ProcessesCasting. Casting is a basic molding process as it requires the least amount of complex technology. ... Injection Molding. Injection molding is used for creating high-quality three-dimensional objects, that can be commercially reproduced. ... Blow Molding. ... Compression Molding.… User What is the best CNC control software? Mach3Mach3 is without any doubt the most popular software on the market so far.Mach3 is a control software compatible with many hardware solutions and has positioned itself as the market leader for low-end CNC control software.. How do I choose a stepper motor? Then select a stepper with at least twice as much torque as required at the target operating speed, and use a motor rated at about ¼ supply voltage. Next, look at the driver current required to get target motor torque. Select a stepper driver based on that number. What size breaker do I need for a 15 hp motor? Full Load Current: Three Phase AC MotorsMotor HorsepowerSize Breaker7-1/2230V 460V40 3010230V 460V50 3015230V 460V70 4020230V 460V100 506 more rows•Feb 16, 2017 How do you make an electric motor more powerful? We can increase the turning force (or torque) that the motor… |
Work done to stop a moving object
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