What is Bend: Definition and 140 Discussions

Bend is a city in and the county seat of Deschutes County, Oregon, United States. It is the principal city of the Bend Metropolitan Statistical Area. Bend is Central Oregon's largest city and, despite its modest size, is the de facto metropolis of the region, owing to the low population density of that area. Bend recorded a population of 76,693 at the time of the 2010 U.S. Census, up from 52,029 at the 2000 census. The estimated population of the city as of 2019 was 100,421. The Bend metro population was estimated at 197,488 as of July 16, 2019. It is the fifth largest metropolitan area in Oregon.
Bend is located on the eastern edge of the Cascade Range along the Deschutes River. There the Ponderosa pine forest transitions into the high desert, characterized by arid land, junipers, sagebrush, and bitterbrush. Originally a crossing point on the river, settlement began in the early 1900s. Bend was incorporated as a city in 1905. Economically, it started as a logging town but is now identified as a gateway for many outdoor sports, including mountain biking, fishing, hiking, camping, rock climbing, white-water rafting, skiing, paragliding, and golf.

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  1. J

    How much will a steel plate bend?

    Hello, I am trying to figure out how to determine how much a simple steel plate will bend with "x" amount of weight on it. I have searched the internet looking for some good descriptive information for my studies and am having a hard time figuring it out. I understand that it is probably...
  2. I

    Does a light beam bend in an accelerating elevator?

    My understanding is that a light beam will bend in an upward accelerating elevator. I told my uncle this. He responded that the velocity of the elevator cannot be added to the velocity of light since light's velocity always remains the same no matter the motion of the source or the observer...
  3. A

    Help Building Simple Pipe Bend (Experiment)

    So as a side project for my professor, I'm supposed to 1) build a recirculating simple pipe bend 2) experiment and get data 3) do hand calculations via fluids equations (Bernoulli) 4) simulate with solidworks 5) compare results Restrictions: budget and availability of finding products...
  4. N

    How effective are honeycomb plates at preventing "bend"?

    I'm designing a custom ultra stiff strut bar for a car. Achieving extreme stiffness usually adds a lot of weight, so I am looking into ways to reduce the weight. Honeycomb plates are extremely light, but are only stiff in certain directions. This is perfect for my application since I am...
  5. J

    Superconductors and Space: Can Electricity Bend Reality?

    Hi! I was wondering that if you could put enough electricity into a superconducting coil if it would be powerful enough to bend space?
  6. P

    What is the minimum force needed to bend a 16mm x 2mm stainless steel pipe?

    The Tube materials and their mechanical properties. Tube Material Y.S - Mpa U.T.S-Mpa Modulus of elasticity- Gpa Stainless steel304 215 505 200 Tube Size, thickness & corresponding bending radius are. Tube Dia & thickness Corresponding...
  7. P

    Does light bend around objects? (Not by gravity or diffraction)

    Today I was watching the full moon while I had one eye closed. There was a vertical metal rod which, by moving my head a bit, covered the moon completely, so that no direct light could hit my eye. (Yeah... I do things like that...) I saw a thin line of moonlight parallel to the rod right at the...
  8. gfd43tg

    What is the Force Exerted on Supports Holding a 90 Degree Reducing Bend Pipe?

    Homework Statement A 90 degree reducing bend has an inlet diameter of 4 in. and an outlet diameter of 2 in. If water enters the bend at a pressure of 40 psig and a flow of 500 gpm, calculate the force (net magnitude and direction) exerted on the supports that hold the bend in lace. The loss...
  9. L

    Force needed to bend 2 inch square tube

    My question is: Researching two sizes of square steel tubing to use for a project. material 2 inch square tubing with 0.25 thick wall and 3 inch square tubing with 0.25 thick wall. The square steel tubing will be welded on to a frame at an angle so the corners point up and down , or another...
  10. R

    Thin Walled Tube around a 180deg bend

    Hey guys any help you can help me solve a problem at work. I've been UV testing some polymide tubing and I need to know if it will survive one of our manufacturing processes post UV exposure. The OD is 21 (0.91 mm) thou and wall thickness is 3 (6.4 mm) thou. It will be loaded with approx 4kg...
  11. J

    Bend Lines for Impeller Fabrication

    Hi, I'm trying to calculate the bend lines required for fabricating a blade for an agitator. I've built up a 3d model of the agitator but I'm having issues producing a drawing that can be used to fabricate the blades. Once I have these details then I can send the blade out for fabrication...
  12. P

    What Forces Act on a Train Carriage Moving Along a Bend?

    Homework Statement A train consists of a locomotive and five identical carriages, connected via massless ropes. Initially the train is moving at a speed V. At this speed, the tension in the rope, F between the locomotive and the first carriage exactly balances the resistive drag, so the train...
  13. S

    Why does light bend when passing from one medium to another

    I know that light bends when traveling from one optical medium to another. The "classic" answer to this question is of course because the average velocity of light changes in the process. I've also seen other ways to make it "intuitive" enough to take it as a hard fact, eg. thinking of light as...
  14. S

    Does mass bend the Higgs field as well?

    We know that - mass bends space-time - this is known as gravity We also know that - (interaction with) Higgs fields gives mass to particles Does mass/gravity bend the Higgs field as well?
  15. T

    Car negotiating bend - Forces

    Hi, I am confused a little bit with the forces acting on a vehicle when it's negotiating a bend, at constant speed. Please click the link to see my sketch. On the plan view I see that it's moving with constant speed, along a circular route. That means there is unbalanced force...
  16. S

    Does mass physically bend space or is time being bent?

    I know I've separated space and time, which is the opposite of what Einstein was trying to do. But do planets and even human bodies (and my golden retriever) actually warp the physical properties of space, or is it that time (whatever that is, though it seems to exist in space, thus spacetime)...
  17. A

    How can black holes bend time ?

    how can black holes bend time if time bending is impossible ?
  18. D

    How do cables bend and curve when fixed at two points?

    Hi I have a cable that is fixed at 2 points, and I would like to model the curve that it bends as the two points move together and further away. In one scenario, the cable is fixed at both ends (one above the other) like a "C". In the other scenario, both ends are also fixed in clamps, but...
  19. Philosophaie

    Do Solar Systems with Eccentric Planets Have More Stable Orbits?

    As the experiment proving Einstein's Relativity where the light waves from a star bend from the gravity of the Sun when viewed from a solar eclipse. Does Gravity do the same? Is Gravity an electromagnetic effect? The Gravity of the Earth has a tail from the Solar Wind that is bent due to...
  20. T

    How does band bending occur in energy band diagrams?

    My only exposure to energy bands is coming from courses on semiconductor devices (diodes and transistors), and I only understand the very basic theories of quantum mechanics (I've only taken a course which briefly introduced it). The thing is, we keep using energy band diagrams to explain and...
  21. M

    Why do energy bands bend in semiconductors?

    Dear Physics forum users The below figure is from http://pubs.acs.org/doi/full/10.1021/jp0009305 In Fig. 3, energy band diagrams are shown for a semiconducting material inbetween two metal electrodes. The figure caption is: "Figure 3 Energy band diagrams for (a) p-type SiNW (b)...
  22. M

    Exploring a Bend-Resistant, Elongating Material for Thin Fiber Applications

    hello! is there a material that doesn't bend, but can elongate? in the form of a very thin fiber thanks!
  23. S

    Does any field, other than gravity, bend space-time?

    In particle physics, quantum field theories such as the Standard Model describe nature in terms of fields. Each field has a complementary description as the set of particles of a particular type. Does any field, other than gravity, bend (or have any noticeable interaction with) space-time?
  24. J

    Will the 1018 steel bar bend problem

    I need some help determining if a bar with increased length and loads is going to bend. The original length and loads were 1018 steel, 1 3/8 dia, 7.8" long with 480 lbs at one end and being supported with bearings at 2 locations 4.68" and 7.8" away. The new configuration is 1018 steel, 1 3/8...
  25. N

    Why does mass bend spacetime in a single plane?

    well yeah i understand that in general theory of relativity is about bending of space time. but why does the bending of spacetime itself is not relative? i mean look at these photos, why does spacetime was bended that way? why not sidewards? why not on top? just want to know why. thanks :)
  26. Q

    Does Matter's Mass Determine Space's Curvature?

    I am 9 years old. Can anyone explain this to me?
  27. I

    Calculating the force to bend steel

    Picture a game of hangman. You have a vertical pole, a horizontal bar extending out from the pole and then the poor guy being slowing hanged hanging at the end of the horizontal bar. I'm trying to calculate much weight the pole can support before it bends. Well, actually I'm trying to hang a...
  28. G

    Flow around a reducing bend - effect on pumping work

    Hi all, On my race vehicle, one part I am looking at is reducing the pipe losses within the modified oil lubrication system (now dry sump). The main area in question is a 120 degree bend that the engines lubrication pump is pulling oil into the oil storage tank. This has been reduced in ID...
  29. S

    Correlating/deriving space time bend with law of gravitation

    We know that 1. Mass causes bend in space-time and this is the how gravitation occurs. 2. The formula for gravitation (per the universal law of gravitation) is product of masses divided by the square of the distance between them and multiplied by the universal gravitation constant. I...
  30. S

    Equivalent length of pipe bend

    can someone explain to me why it seems that the smaller the diameter of pipe bend (i.e. 90 degree elbow = 30D) the shorter its equivalent length becomes? for 1.5" diameter = 45" equivalent length while 2" diameter = 60" length. does this mean 1.5" diameter 90 degree elbow has less friction than...
  31. L

    Pipe bend fluid mechanics problem

    Homework Statement The pipe shown has a 180° horizontal bend in it as shown, and D is 20 cm. The discharge of water (ρ = 1000 kg/m3)in the pipe and bend is 0.30 m3/s, and the pressure in the pipe and bend is 100 kPa gage. If the bend volume is 0.10 m3 and the bend itself weighs 500 N...
  32. A

    Why does light bend while changing media?

    While changing media,why does light bend? And why does blue light bend more than red? It would be helpful if i get an answer related to molecular composition and interaction of photons with molecules.
  33. 0

    How to find the spec for a bend in a coil

    Howdy folks, I'm having trouble finding a spec for bends in wound wire i.e. a coil. For example if you take the coil, say 150mm long and roll it on a flat surface and it deflects from the table in places (wiggles), how does one possibly determine what is an acceptable bend and what isn't? It...
  34. johann1301

    How far does space-time bend out in space?

    When looking at Earth's ability to curve space-time; how far does these curves go? can they theoretically be registered at the edge of the universe?(just an infinite small amount of course).? i suppose i could just ask if Earth's gravity stretches everywhere in the universe? or.. is there a...
  35. A

    Concentrated pressure drop in tube having 90 round bend

    Hi i want to calculate the concentrated pressure drop in a tube having 90 round bend and other one having 180 round bend. The equation that i know is: dP (concentrated) = 1/2 * b*r*v^2 where: b=specific coefficient for concentrated pressure drop r = liquid density (kg/m³) v = average...
  36. R

    *May be a stupid question* Does Oxygen/Nitrogen bend space-time?

    I understand that matter and energy bend space time, yet i am curious as to the level at which it requires to bend it. This is obviously an elementary leveled question, but i am quite curious. Also, is there any level of matter that is incapable of bending space-time? Thank you!
  37. T

    Equivalence priciple, light bend

    in my textbook it say that a frame which move at constant velocity in deep space and a frame under free fall in uniform gravitational field will be Equivalent. There is no experiement that observer can do to see whether he is in which of the two frame. But it later say that light bent in...
  38. S

    Why does the bend in space time not affect the gyroscope?

    The bend in space-time due to Earth's gravity was measured by a gyroscope. A bend in space-time causes even light to bend, how does a gyroscope escape this? The angular momentum being discussed in a gyroscope, is this the same as the one we call "spin" in the entangled photons/electrons?
  39. C

    Bend Angle After Bending a Bar Around a Pin

    I think this is the right place to put this. If not I apologize. Feel free to move. I am trying to solve the bend angle for a bar given specific dimensions. The bend angle is acute as in the bar traverses the pin for more than 90-degrees. The bend angle is the angle of the projected lines...
  40. B

    Mass Bending Space: Theories Explored

    It seems obvious to me that mass isn't just bending space but it's essentially bent space. Have any previous theories shown this before?
  41. Q

    Pressure drop in pipeline in a bend or elbow

    I wonder if there is no table or graph with which I can make a quick estimation of the pressure drop in relation with pipe diameter and flowrate ( for 90° bends only ) ... can anyone help me with that ?? Thanks !
  42. N

    Does light itself bend spacetime?

    Hello, I understand light can be accelerated in a gravitational field, because it follows the curves in the spacetimecontinuum. Now I was wondering: does light itself also create a distortion in spacetime and thus attract other things? And are there experiments to confirm this? (E.g. two...
  43. S

    How does light bend under gravitational field(gravitational force), why?

    As I have heard that light bends under the gravitational force. While according to formula "w=mg", gravitation acts on objects that have mass, but light has no mass if it is considered as photon nature. And also if light bends under gravitational FORCE then light velocity must...
  44. E

    Calculating Variables for Bending a Beam

    How many variables would i need? I already know the 1.Length of beam 2.Weight of object on beam 3. Width 4.Thickness 5. Weight of beam 6. Young's module 7. Gravity? (not sure since the weight of object already has gravity and the same weight on the moon not mass would make it bend...
  45. N

    Does an EM wave bend in a B-field?

    I read somewhere that Thomson (1897) concluded that the electron was not an EM wave because it bended in a magnetic field and that it had been proven that EM waves did not do this. Is this true?
  46. 9

    Formula for X-Y-Theta bend test

    Being a 4th year mech. engineering student, you would think I could figure this out. But, for some reason, I can't get the right values. I am designing a bend test fixture for a company I am co-oping for, and although the idea isn't final yet, I figured I'd get a head start on this particular...
  47. N

    If photons don't have mass, why do their paths bend in a gravitational field?

    If photons don't have mass, why do their paths "bend" in a gravitational field? This is question #8 in the FAQ and the answer provided is this: I'm trying to understand the last sentence. I must be having a mental block: why would thinking of "relativistic mass" cause identical...
  48. P

    Light seems to bend around objects but why?

    Hello everyone, First of all I am new here and I hope I came to the right place :) I have been troubled by two observations I have about light, I come into difficulty to find the right words but I will try: First of all here is a picture that may help: Observation 1: With one of my...
  49. F

    What Is the Minimum Bend Radius for a Car Given Frictional Constraints?

    Homework Statement A certain car experiances a limiting maximum frictional force equal to 75% of its weight. What is the smallest radius of bend that it can move around on a level road at 20ms-1Homework Equations F=mv2/r The Attempt at a Solution Couldnt get past last stage.
  50. R

    Why do ice skaters bend at an angle when taking a turn at high speed?

    Why do ice skaters bend at an angle when taking a turn at high speed? I saw some pictures of ice skaters leaning while taking turn...in case of motorcyclists it is due to gyro effect but what in this case?
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