Displacement Definition and 999 Threads

The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, metric tonnes are more commonly used.
Ship displacement varies by a vessel's degree of load, from its empty weight as designed (known as "lightweight tonnage") to its maximum load. Numerous specific terms are used to describe varying levels of load and trim, detailed below.
Ship displacement should not be confused with measurements of volume or capacity typically used for commercial vessels and measured by tonnage: net tonnage and gross tonnage.

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  1. B

    Decent references for SN2 displacement of tosylate with acetylide

    i'm having trouble finding good references for lithiating a terminal alkyne and reacting that acetylide with a tosylate, and my goto procedure didn't work. can anyone give me a hand? procedure i did try: alkyne in THF at -78 1.0 eq nBuLi added 1.0 eq tosylated phenylethanol added (color...
  2. F

    Find the total displacement on a velocity-time graph

    Homework Statement What is the total displacement of the graph? (see the picture) The answer is 14m. Can you please show me how to do it? Thank you for your help! :D
  3. S

    Why does higher derivatives of displacement not concentrated?

    I luckily went on to Newton's laws which I already know. I was stuck with a fantastic question ( I have been seeing the Newton's laws from my childhood, but I didn't notice these sort of observation ) . I was seeing the Force and Momentum. Force is based upon acceleration and Momentum on...
  4. R

    Angular Displacement Differentiation

    Homework Statement An angular displacement θ radians in time t seconds is given by the equation θ = sin 3t. Find a:) angular velocity when t = 1 second b:) the smallest positive value of t for which the angular velocity is 2rad/s c:) the angular acceleration when t = 0.5 seconds d:) the...
  5. Z

    Vector displacement around a closed loop

    My book says that the total vector displacement around a closed loop is zero. Is this a general thing for every type of closed loop? If so, should this be obvious?
  6. T

    Elastic String Displacement u(x,t)

    Homework Statement Consider an elastic string of length L whose ends are held fixed. The string is set in motion with no initial velocity from an initial position u(x, 0) = f (x). Assume that the parameter alpha = 1. Find the displacement u(x,t) for the given initial position f(x) The Attempt...
  7. W

    Physics problem involving displacement of car

    Homework Statement A car is driven east for a distance of 48 km, then north for 25 km, and then in a direction 33° east of north for 29 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total...
  8. jssamp

    Displacement of emerging light ray

    Homework Statement A light ray is incident on a flat piece of glass with index of refraction n. Show that if the incident angle θ is small, the emerging ray is displaced a distance d = tθ(n - 1)/n form the incident ray, where t is the thickness of the glass and θ is in radians. Homework...
  9. MathematicalPhysicist

    Question on energy displacement.

    I want to show that the energy displacement of Z^{2n}(r), the 2n-dimensional cylinder with radial radius is at most \pi r^2. In the textbook of Mcduff and Salamon they write that I should identify the two dimensional ball (with radius r) with a square of the same area, and then calculate...
  10. binbagsss

    SHM: Vertical Displacement Above Equilibrium

    SHM - VERTICAL Surely whether you consider the motion used to establish the SHM system, or the motion as soon as the system is released you should derive the same equation. DISPLACEMENT BELOW EQUILLBRIUM. However, consider a verticle spring with particle attached hanging in equilibrium...
  11. J

    Displacement of an object in circular motion

    Homework Statement A1. An object undergoing circular motion is pictured below at time t = 0 s. (a) What is the angular frequency of the object? (b) What is the equation of the displacement of the object in the x-direction? (c) What is the equation of the displacement of the object in the...
  12. S

    Finding Electric Field and Displacement in Two Regions

    Homework Statement Now consider a specific example where this boundary lies in the plane y = 0 and we have ϵ1 = 4, ϵ2 = 5 and σ = 5C/m2. The electric field in region 1 (with y > 0) is given by ⃗ E1 = (20,−10, 15) V/m. Find ⃗D1. [1] Find ⃗D 2 and ⃗ E2 in region 2 with y < 0. [4]...
  13. K

    Waves can cause the displacement of an object.

    Now it's known that waves can't cause the displacement of an object but i made a few experiments that proves it can. For example , wind can cause a wave the can move a piece of paper. However, a water wave can't cause the displacement of and object but other waves like wind can cause that waves...
  14. S

    Finding work when displacement is a function of force

    Hi, I've taken introductory calculus and am doing algebra based physics, but I'm trying to understand how to relate calculus to physics. This is more of a theoretical question than a practical one, so I might be rambling on about something that doesn't even work. I know that W=∫F(d)Δd, but...
  15. P

    Finding Time Using Displacement and Acceleration

    Homework Statement "A body is thrown downward with an initial speed of 20 m/s on Earth. What is the time required to fall 300 m?" I tried finding kinetic and gravitational energy, but then I realized I don't have any mass to use it with (1/2)*m*v^2 and m*g*h How can I solve this problem...
  16. N

    Simple Harmonic Motion and spring displacement

    Homework Statement An object of mass m is suspended from a vertical spring of force constant 1800 N/m. When the object is pulled down 2.50 cm from equilibrium and released from rest, the object oscillates at 5.500 Hz. a) Find m, b) Find the amount the spring is stretched from its unstressed...
  17. J

    Angular displacement of a curve ball

    1. A pitcher throws a curveball that reaches the catcher in .60s. The ball is spinning at an average angular velocity of 330 rev/min, (assumed constant) on the path to the catcher's mitt. Find angular displacement. 2. θ=ωt where t is time, ω is angular velocity, and θ is angular displacement...
  18. J

    Calculate displacement when acceleration is dependent on displacement?

    I really have no idea where to start with this. I have a=\frac{2.071\cdot10^{11}A}{mx^{2}} m/s2, where A and m are constants. Since the acceleration is dependent on position, and the position is obviously dependent on acceleration, I don't know how to separate the two in order to do any...
  19. G

    Virtual displacement and generalised forces

    I am unsure about the virtual displacement and work definition even after looking through the definition and seeming to understand it. If we have ## \delta W = \displaystyle \sum_{i} \vec{F}_i \cdot \delta \vec{r}_i ##, I can use, ## \delta \vec{r}_i = \sum_{i} \frac{\partial...
  20. T

    Graphical Analysis Question - Torque, Angular Displacement

    Homework Statement The graph shows the behavior of an object with the moment of inertia of 18 kgm^2 a) Calculate the magnitude of the constant torque that acted on the system. b) Through what angle did the object rotate between t=2 and t=20 seconds? Homework Equations...
  21. T

    Double Slit Experiment - White Lite & Minimum Angular Displacement

    Homework Statement A two-component beam of light, consisting only of two wavelengths 650 nm and 520 nm, is used to obtain interference fringes in a double-slit experiment. The separation between the centers of the slits is 2.43×10−4 m and the distance of the plane of the slits from the...
  22. phosgene

    Displacement of ball bearing using conservation of energy

    Homework Statement A large ball bearing is suspended as a pendulum. One end of the pendulum is held by the electromagnet (1) and the ball is initially held by magnet (2) at some height, h, above its lowest position. The ball is released from (2) and as the pendulum swings through the vertical...
  23. M

    Buoyant force and water displacement

    couple question regarding buyoancy and water displacment 1. so if you have a pond w/ ρ=1.2 and part of the water in that pond turns into ice will the level decrease increase stay the same? (i think it will stay the same) 2. same pond w/ a ρ=1.2 and you add ice cubes w/ a ρ= 1.2 the cubes...
  24. S

    Projectile Motion with displacement and time

    Homework Statement A boy kicks a ball into the air. It takes 4.3 seconds to land 41.1 meters from his position to the right. What is the launch velocity and launch angle of the ball? Ignore air resistance. Δx = 41.1 m t = 4.3 s a = -9.8 m/s2Homework Equations dx = vxt vfy = v0y + at The...
  25. P

    Integral of speed as a function of displacement

    Hello, I'm trying to figure out a way to do an integral of a speed/velocity function v(x) described as a function of displacement (the speed changes based on the position of the particle). I want to know the distance traveled after a specific period of time, and I can't figure out how to...
  26. S

    Calculating Displacement with Sine Waves

    Homework Statement y=0.2msin[(0.18rad/m)x+(90 rad/s)t - pi/4] What is the displacement at position x=0 and t=0? Homework Equations y(x,t)=Asin(kx-wt+phi) The Attempt at a Solution y=0.2m[0.18-90]=-0.199m the answer is -.141 m help?
  27. M

    Time period of oscillation and displacement from O

    Homework Statement In the attachment! The Attempt at a Solution My big hangup in this situation is why T, the period, of the oscillation doesn't change? If you increase the displacement by 2A does this mean that since the force acting on the spring also increases proportionally there's...
  28. A

    Find the displacement of the underdamped driven mass.

    Homework Statement A mass "m" is oscillating on a spring in one direction. And the mass has a dampening constant ψ. The right end of the spring is attached to the mass, and the left end is driven by a force. For t<0, the spring end is at rest, but for t>0 the end oscillates with amplitude...
  29. G

    How Do You Calculate Displacement with Varying Force Over Time?

    Homework Statement Find Δx Given: Fxe-(t/T) v0=-41.2 m/s tf=84.54 s T=46 s Fx=13.4 N m=8.8 kg Homework Equations F=ma The Attempt at a Solution a=Fxe-(t/T)/m dv/dt=Fxe-(t/T)/m *integrate both sides* v=[(-T)Fx)/m]e-(t/T)+v0 dx/dt=[(-T)Fx/m]e-(t/T)+v0 *take the...
  30. N

    Basic physics/ wavelength and displacement questions

    Hi guys, i'd really like to understand physics but for some reason I'm not coping. Not sure if it's the calculations or something. But I'm willing to learn, I'd appreciate some help with this problem:Homework Statement A B string on a guitar with a length of 33cm is held fixed at both ends...
  31. F

    Finding displacement from PE and KE?

    Homework Statement We were assigned bookwork, we have a test on thursday, and I really don't understand the concepts of the lesson or what we are suppose to be doing. (My teacher is not the best by any standards.) Anyhow, here is the problem. " A 50.0 kg diver steps off a diving board and...
  32. S

    Kinematics, finding the displacement and comparing

    Homework Statement using a map, measure the displacement from Bradford to Milton. Compare the distances traveled to the for each route above with this displacement and explain the differences Homework Equations Δd = vΔt The Attempt at a Solution okay, so i may just being having a brain fart...
  33. O

    Displacement of an electron between two plates

    Homework Statement In an oscilloscope, an electron is accelerated from rest through a voltage of 1.14x103 V. It then passes through deflecting plates 2.00 cm apart, across which there is a voltage of 412 V. Its velocity when it enters the plates is perpendicular to the electric field of the...
  34. T

    Displacement after Time T in a Velocity Field

    I have a velocity field that is static in time. At every location, x, there is a corresponding velocity vector. I'm trying to work out the displacement of a particle after T seconds if I drop it into the velocity field at time t=0 and at location x_0. I was thinking something along the lines...
  35. A

    Calculate the angle between the displacement vector and the force vector

    Homework Statement A force F = 8i-3i N acts on a particle that undergoes a displacement Δr = 2i + j m. (b) What is the angle between F and Δr? (state your answer to three significant figures) Homework Equations Angle = cos-1 (A.B/ AB) The Attempt at a Solution W=13.1 J AB=...
  36. E

    Emailanmol's discussion on angular displacement

    Mod node: This thread was split from this other thread, 590162. Hey vkash. This is a good one. See, instantaneous angular displacement is a vector. Average angular displacement is not a vector.What does this information tell you about instantaneous angular velocity and acceleration...
  37. L

    Check 2 waave displacement equations please

    Got to calculate the superposition of a couple o' waves, wanted to double check if they are both the same frequency and wavenumber?x1(t) = 3 sin(2∏t + ∏/4 ) and x2(t) = 3 cos(2∏t). I take it 2∏ is the frequency? And since Kx is not inside the function how can I know whether the wave numbers...
  38. H

    Vertical Displacement of Electron (Millikan's Oil Drop)

    Homework Statement An electron moving horizontally at 2.50 x 106 m/s enters a 150 N/C electric field exactly half way between two horizontal parallel plates and follows a parabolic path downwards. Both plates are 14 cm long and spaced 10 cm apart. Determine the vertical displacement of the e-...
  39. T

    Inelastic Collision of 2 Carts - Displacement

    Homework Statement A 15.0 kg toy cart is traveling at 5.5 m/s to the right when it collides head on with a 10.0 kg cart traveling at 4.0 m/s to the left. The objects collide and stick togethere. The coefficient of friction between the wheels of the cart and the floor is 0.40. How far will the...
  40. X

    How Do Displacement and Distance Differ in Particle Motion Calculations?

    Homework Statement A particle's position is described by x=2t^3-4t-5 Find its a) displacement b) distance from t=0 to t=5 Homework Equations The Attempt at a Solution Displacement, plug in x(5)-x(0) = 230m Distance, shouldn't it be the same thing plug in and get 230m? But...
  41. mishima

    Misc Questions: Virtual work, RMS, Friction on incline, and Virtual Displacement

    I have a few questions I thought I'd post together instead of making separate threads, hope that's ok. They are more or less unrelated... 1. Are there 2 conceptual ideas that use the term "virtual work"? I am familiar with the one from intro level physics, but I read there is also one from...
  42. T

    Finding displacement from variable acceleration

    Hello, I've been staring at this question for an hour with no luck.. if anyone could point me in the right direction that would greatly appreciated! Homework Statement a = acceleration v = velocity x = displacement m and n are constants vt = terminal velocity Show that after...
  43. J

    Does water displacement theory apply to other liquids?

    Hi, I assume that you all know the water displacement theory where: The volume of water displaced is equal to volume of completely submerged object. Now, my questions is this: does this theory work for other liquids besides water (e.g. mercury, seawater)? If not, then can you please...
  44. V

    Why displacement equals (average a) x (t)

    I get the proof with the velocity as a function of time graphic. I don't get why that is... E.G. Why does something with a constant acceleration of (1m/s)/s gets displaced the same as something with a constant velocity of .5m/s?
  45. V

    Simple Harmonic Motion displacement

    Homework Statement A mass m is attached to a horizontal spring of spring constant k. The spring oscillates in simple harmonic motion with amplitude A. Answer the following in terms of A. At what displacement from equilibrium is the speed half of the maximum value? Homework Equations PE1 +...
  46. X

    Rectilinear motion (displacement, position) calculus

    Homework Statement A particle has a linearly varying rectilinear acceleration of a=x''i=(12t)i m/s^2. Two observations of the particle's motion are made: Its velocity at t = 1s is x'i=2i m/s, and its position at t= 2s is given bt xi=3i m. (a) Find the displacement of the particle at t=5s...
  47. J

    Acceleration, and displacement

    I think we can't have a negative displacement. Is that right? Acceleration: the change in displacement / change in time squared Since displacement can't be negative, and time can't be negative, acceleration also can't be negative. But I know (it's in the books) that when we have decreasing...
  48. A

    Where to find Electric displacement help

    I'm having a little trouble wrapping my head around the idea of electric displacement fields, it doesn't fit in with any the intuition I gained from lower devision E&M. Are there any lectures online dealing with the subject? Or textbooks that do a particularly good job of explaining? (My class...
  49. P

    Measurement of material displacement using recorded material thermal data

    Hello all I am trying to measure material displacement using measured thermal data.7 While the specimen is heated up, I want to measure how much it changes its length at particular points. Is this possible? If you have any further questions or suggestions please do not hesitate to...
  50. X

    How do you find time given vi, acceleration, and displacement

    using d=vit+ 1/2at^2 my subs are 75 =3t +1/2 (9.81)t^2 (if an object is dropped is gravity still -9.81?) where do i go from here
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