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.

View More On Wikipedia.org
Recent contents Top users
  1. S

    Truss behaviour, load-deformation curve

    Hello everyone! I am analysing an 18 m per 1.2 m truss, simply supported, with 140x5 chords and 90x8 braces. I then loaded the superior nodes with 500 KN. The top nodes were also laterally constrained to prevent out-of-plane displacements. After imputing the structure in Abaqus (FEA software), I...
  2. S

    Shape of graph of torque vs angular displacement of galvanometer

    I know the torque will be zero when the deflection is zero and will be maximum when the angular displacement is θ0 but how to determine the exact shape of the graph? Thanks
  3. S

    Graph of torque against displacement of galvanometer needle

    My guess is (c) since the rest of the options do not make sense to me but I am not sure about the shape of the graph. Is (c) the correct answer? If yes, how to know whether the shape will be like in the option (straight line then curve downwards) or other shape like straight line only (like y =...
  4. S

    I Displacement vs time under a time varying speed limit

    The speed limits on a straight road are given by a known function g(x,t) where x is the location on the road and t is time. A car starts at x = 0 at time t= 0 and always drives at the speed limit. The location of the car is given by the (unknown) function s(t). Is there a differential...
  5. IWillBarelyUseThis

    Solving for Displacement: 9.8m or 36m?

    So the equation I had used made sense to me because through the wording of the question, since we have an initial velocity of 0m/s, and an acceleration of 2.5m/(s^2), and it was implied in the question that she caught the robber at the exact same time as she reached her maximum velocity, and...
  6. CBA

    Calculating Net Force on an Electron using E(r) and mx

    I just insterted E(r) into F to get the net force. After that I wrote mx''=Fnet and I don't know how to proceed (supposing that's the right way).
  7. N

    Displacement and distance when particle is moving in curved trajectory

    While solving question 1.13(see the attachment) from Irodov, I was doing this: $$\int_{0}^{\tau}(\vec{v}-ucos\theta) dt=l$$, and $$\int_{0}^{\tau}\vec{v}cos\theta dt=u\tau$$. Solving this gave the answer. However, while solving these 2 equations, I only used the magnitude of ##\vec{v}##, and...
  8. J

    Displacement & Angle Theta: Figuring Out Centripetal Force

    For the displacement, how do I figure out the angle theta between the points? And how does the speed at which the string retracts affect the centripetal force?
  9. O

    How to find d2 when given d1 and d, total time, and average velocity?

    I rearranged the displacement formula to d2 = d + d1. I used cosine law to solve for d2 since the triangle is not right-angled but I am not getting the correct answer or angle for d2. The angle I used in cosine law (based on the diagram) was 32+12+90 = 134. d = v(t) = 130(3) = 390 km/h [N 32 E]...
  10. D

    Solving Transcendental in Wien's Displacement law

    Hello, I have attached my attempt at a solution. All is okay until i reach x=5-5e^-x. My assignment suggests that i solve it by substituting x=5-ε into the equation where ε is assumed to be small. Solve for ε and then solved for x (Approximate). Thank you for your help
  11. E

    Having trouble with finding this displacement vector

    Broke it into its components finding d1x, d1y, d2x, etc... Using those components I found drx to be 228.38km and dry to be 120.429km. Did Pythagoras to get 258km as the resultant displacement, heading N62W. I'm honestly lost. I'm doing the question the correct way, I just don't know what I'm...
  12. T

    Positive displacement pump for spray nozzles

    Hi all, I have a positive displacement (diaphragm) pump that I am looking to use to supply spray nozzles. The pump has a max pressure rating of 69 bar at 30.6 L/min (1450 rpm). I however want my nozzles to spray at 15 bar pressure and from the nozzle performance data sheet that equates to 0.68...
  13. maxim

    Non magnetic linear displacement system for moving a Hall Sensor

    Dear mechanical expert I have to realize a linear displacement system for a Hall sensor that has to slide along the central axis of a narrow cylinder and with which high intensity magnetic field measurements (1-14 Tesla) have to be made. The field is produced by a commercial vertical magnet...
  14. danielhaish

    I Are there waves that go up and down without going below zero displacement?

    weave is change in something. and I always see harmonics wave that looks like this there is some normal value let's say the height of the water then the height of the water become higher then normal and then lower like that But do there are an harmonics waves in physics that just going up and...
  15. jamiebean

    Magnitude of the displacement of a spelunker exploring a cave

    in part a, i tried to draw the scale and tried to determine the magnitude. But I still don't get why is the answer written in that way. in part b: i know that x180/pi calculates the degree, but i don't understand how does this calculates the direction. and i don't understand what's happening in...
  16. jamiebean

    Direction of resulting displacement

    I do not understand part b. I know that x180/pi changes the value into a degree, but i do not understand what's going on inside the bracket. And how did the equation calculated the direction?
  17. A

    Displacement as a discrete function of time

    Given initial displacement ##X_0## and displacement at any time ##t## as ##x##. Where ##x(t)=f_t(X_0)## where the functional dependence of ##x## upon ##X_0## changes with time. For exm ##X_0=2## and ##x(t_1)=X^2_0=4,x(t_2)=X^2_0+1=5,x(t_3)=X_0^3+3=11...##and so on. From this, is there any method...
  18. E

    Calculating System Work and Displacement of Center of Mass

    <work done a system> a) w=5N*(0.4m)=2J I think this is right, but b) center of mass initial = ((0.5kg)(0.05m)+0.5kg(0.65m))/1kg = 0.35m center of mass final = ((0.5kg)(0.45m)+0.5kg(0.4+0.1+0.3+0.25))/1kg = 0.75m I'm not sure for this one... How can I calculate the displacement of the...
  19. F

    Arbitrariness of the surface involved in the displacement current

    I was thinking of a standard, high school level discussion of the displacement current. The need for introducing this quantity is demonstrated by considering a circuit with a charging capacitor, and (for the sake of simplicity) a circular loop whose axis is along the (straight) wire carrying the...
  20. J

    Fortran Fortran subroutine solving for the velocity and displacement of a spring

    I have a simple Fortran code for solving velocity and displacement of spring, the code works fine when writing all together without using a subroutine. but as I am learning Fortran I tried to do it using subroutine, but I keep getting errors appreciate any help in advance. program msd implicit...
  21. K

    Vacuum interrupter contacts and displacement current

    I’m self taught so I have a lot of holes in my understanding. I also have little to no mathematical understanding. Even though ironically, I tend to prefer to picture electricity as numbers rather than “water” in a pipe, etc. I’ve been studying displacement current recently and have a question...
  22. J

    Proper barograph linkage settings for maximum pen displacement?

    Hi. I wasn't sure where to post this. It does relate to Earth science, but still wasn't sure whether or not to post there. Anyway, I am trying to determine the proper settings of the linkage of my barograph so that the pen moves the greatest distance up or down on the chart with as minimal...
  23. J

    Kinematics and displacement, who is right?

    Hi everyone I have an issue with my physics teacher about a question on displacement. I have inserted the screenshot of the question below. By the definition of displacement, I was sure, and still am sure my answer is correct. But my physics teacher insisted that I am wrong. Please, can anyone...
  24. R

    Calculating the spring displacement response from an acceleration input

    I'm working on a project where we have a mass (50 kg) sitting on a spring (350 N/mm) and are subjecting it to a sudden impulse (20g) along the spring axis to simulate a shock. We have the profile of the acceleration defined as: ##a(t) = x''(t) = P\cdot \sin^2 (\pi \cdot t / T)## Where P (peak...
  25. S

    Engineering Calculate consumption, displacement and speed using given standards

    I calculated the value of kgf/cm^2 from given values. In the second table (Force exerted by the pneumatic cylinders) I see my value 5.6 exactly but how do I then read the table to get the diameter of the cylinder and then the rod? I then am stuck on how to calculate the total consumption...
  26. MrDickinson

    I Understanding the Concept of Recoil in Relation to Momentum and Force

    I am having some difficulty understanding what "recoil" really is with respect to momentum, force, and and time. On the one hand, momentum is considered to be the product of mass and velocity or perhaps the product of the sum of masses and some velocity, or some variant of P=mv, where P is a...
  27. jisbon

    Finding the displacement of an electron between 2 charged rods

    Since electron will stop eventually due to efield, equation is : ##v^2 = u^2 +2as## Where v = 0 , u = ##1.04*10^8 m/s## ##a = \frac{qe}{m} =\frac{(1.6*10^{-19})(e)}{9.11*10^{-31}}## ##e = \frac{Q}{4\pi\epsilon(1)}+\frac{Q}{4\pi\epsilon(4-1)}## Are the equations correct? Or is my concepts wrong?
  28. O

    Net Displacement: Calculate x,y & r,θ

    Summary: Figuring net displacement given the angles and distances of three vectors. You travel 4.00 miles East, followed by 5.00 miles at 50.0° N of E, followed by 6.00 miles at 20.0° S of W. What is your net displacement? Give the component form (x and y) and the polar form (r and theta). I...
  29. G

    Acceleration and Displacement from a Velocity vs. Time Graph

    Please could I ask for help with the following question: Part (a) is no problem. Acceleration is the gradient of the graph in regions OA and AB which gives 3 and 0.5 Part (b), I believe, requires me to calculate the greatest and least value of the gradient of the curve in region BC Part...
  30. Anthony Gonzalez

    Question on Test: Hiker Displacement

    a
  31. T

    Resultant displacement in a stretched spring

    If I take the vector sum, I am getting the angle to be 1. (tan^-1 tan(1)). Is that correct?
  32. FQVBSina_Jesse

    Question about net work and displacement

    I know that by physics definition if displacement is zero, work is zero. However, if I push an object 5 m to the east, and then move to the other side of the object and push it 5 m back to the west. I think in this case I have always done positive work on the object and hence the total work...
  33. jisbon

    Exploring Radial Acceleration and Displacement

    From what I understand, ##a_{r} = v_{tan}^2 /r## ##a_{r} = (r\omega)^2 /r## ##a_{r} = r\omega^2## ##\omega^2 = \frac{a_{r}}{r}## ##\omega^2 = \frac{2+2t}{0.12}## ##\omega = \sqrt{\frac{2+2t}{0.12}}## ##s =\int_{0}^{2} \sqrt{\frac{2+2t}{0.12}}## After integrating, I still can't seem to get the...
  34. jisbon

    Elevator Question: Calculating displacement from weighing scale readings

    EDIT: As per @Orodruin 's suggestion(s), I have edited my problems and equations, sorry for the confusion as I typed this out hasty. So from this question, I understand I have to find the net force for the first 10 seconds and deceleration for 20 seconds. The scale shows the force with which...
  35. Z

    Difference between gyroscope angular displacement and Euler angles

    Hi guys, I'm trying to understand between gyroscope angular displacement and euler angles? for example { Δx = Δx + h * Rx * SCx);} this is gyroscope output about anguler displacement.This value can be used to determine angle that device created.Why we should euler angles to fly.(I know...
  36. K

    Converting Pipe Displacement into forces on a Bend

    Hi there, I am by no means a mathematician, I am currently working on a project to improve the safety of gas distribution systems in multi occupancy developments. I am hitting a bit of a wall regarding converting displacement onto force. I am trying to calculate the stress applied to a point...
  37. A

    How Do I Calculate Displacement for Vectors Pointing South and West?

    I have drawn a arrow pointing straight down (South) 110km and an arrow off that to the right(west) 70km.I know that the distance of the journey would be 180km. How do I go about finding the displacement?
  38. E

    Calculating the Displacement (Having Constant Acceleration)

    I'm just having trouble understanding 1) how to plug in the formulas correctly and 2) the correct manner of attacking this. I feel like I'm missing something basic/simple. Any help is greatly appreciated! So far I've got: D = (0) + .5(2.2m/s^2 x 2.4s)^2 Enrique
  39. russ_watters

    Hypoxia: Altitude vs Displacement

    I work in HVAC, for those who don't know, and one of the things that you need to protect against in labs and chiller rooms is the risk of asphyxiation due to oxygen displacement by an inert gas. This is often described as analogous to high altitude hypoxia - and the math is related - but is it...
  40. M

    Convert cylindrical coordinate displacement to Cartesian

    Summary: I can't figure out how the solver carries out the conversions from cartesian to cylindrical coordinates and vice-versa. I have a set of points of a finite element mesh which when inputted into a solver (ansys) gives the displacement of each node. I can get the displacement values of...
  41. N

    Why does the displacement force act on AC - BC?

    Hi, I am having trouble understanding the intuition behind the problem I attached. Work is the product of the force and displacement in the direction of displacement, so since the crate is moving horizontally from A to B why isn't the displacement AB = 6m? Thanks in advance
  42. Astrogirl101

    Maximum displacement of a coupled pendulum

    Hi, So I have this question to solve and I have no idea how to do it. It states: ''How are the maximum displacements of each pendulum related for ω1 and ω2? Draw a sketch that describes the motion of the system in each case. '' The 2 angular frequencies that I have found are ω1 =√(g/l) and...
  43. B

    Calculating Displacement of X and Y with Water-Filled Container

    NO TEMPLATE BECAUSE ORIGIONALLY SUBMIIED TO NON-homework forumHi, I have a pipe connects to a container's outlet. The container contains water and the pipe is open-ended. When a 10Kg object is placed inside the container and compress the water. Can you tell me how to calculate the displacement...
  44. F

    Maximum displacement in mass spring system

    Homework Statement A block is suspended by an ideal spring of the force constant K. If the block is pulled down by applying a constant force F and if maximum displacement of the block from its initial position of rest is X then, find the value of X. Homework Equations mg + F = XK + K(mg/K)...
  45. T

    I Relativistic form of the displacement current using the Biot-Savart Law

    The Biot-Savart law which describes a magnetic field created by a displacement current: $$\frac{dB}{dV}=\frac{\mu_0\epsilon_0}{4\pi}\frac{\frac{∂E}{∂t}×r}{r^2}$$ What's the relativistically co-variant form of this equation? Is the introduction of speed of light propagation delays enough, or...
  46. T

    Magnetic Field of a Moving Charge and the Displacement Current

    We all know a moving charge generates a magnetic field. A moving charge also generates a displacement current ∂E/∂t. Is the magnetic field generated entirely due to the presence of the displacement current, or is there an independent, separate effect which contributes to the magnetic field?
  47. Jonathan1218

    Rolling Marble + Air resistance = Displacement?

    A marble rolls down an inclined plane with an angle of elevation of 5 degrees, roughly 4.9sin(5)m/s/s, and at normal pressure temperature NPT what would I need to add to S=1/2 at^2 to include the air resistance considering the marble is a sphere with a radius of 0.85cm and mass of 20g. The whole...
  48. M

    Nature of displacement and the deformation tensor

    If we have two points P and Q in undeformed material and after deformation they become P' and Q'. The deformation tensor is the derivative of the displacement. What is the displacement? vector PP'? or the change from PQ to P'Q'? is the second question is the strain "change in length". Why the...
  49. S

    Calculus Problem: acceleration, speed, and displacement of a particle

    Homework Statement The acceleration of a particle given a=A√t where A=2.0 m/s5/2. At t=0, v=7.5 m/s and x=0. (a) What is the speed as a function of time? (b) What is the displacement as a function of time? (c) What are the acceleration, speed, and displacement at t=5.0s. Homework EquationsThe...
  50. Justin71

    Inertial force acceleration (vertical axis)

    Hi, How is the inertial force Fi (acceleration) when the system is vertical. I noted Fi_horizontal=m.a, Ff=mg.μ.cos(Θ) et Fg=mg.sin(Θ) .
Back
Top