Displacement Definition and 999 Threads

Homework Statement A 6 cylinder engine has cylinders wirh a bore of 115mm and a stroke of 145mm Each cylinder also has a clearance volume of 300 cubic centimeter. This engine operates on a four stroke ideal otto cycle and at 3000 rpm. The temperature and pressure of the intake air is 25...

Ok, I have a question I have been wondering about. If you have a tube and insert one fan into it. The fan turns to create a certain air displacement. If you put 2, or 3 etc. fans into the tube spinning at the same speed, would it displace more air? or would each fan simply move the air...

Lets say I have a beam with a cross section made of half aluminium and half steel glued together. I would like to know how to calculate the deflection of this beam due to bending moment but I am unsure of how to use the virtual work equation to accomplish this. Should I use a different...

Homework Statement For copper we find that J=\sigmaE , where \sigma has the value 5.8x10^7 mksc units. If an alternating electric field represented by E0ei\omegat exists within the copper. Find the ratio of the conduction to the displacement current density at a frequency of 1megacycle/sec...

I was doing a FEA Stress Analysis of an Alum (6063 T6) part and set the Ultimate and Yield Strength of the material lower to model the behavior at 150 degress C. The displacement (movement) of the model was exactly the same for relatively small forces. The force was 110 N and the Ultimate...

Homework Statement A particle is displaced by 10m along a direction joining 2 points having coordinates A(2,3,4) and B(-4,-5,3).Find the displacement vector if the time of the motion is 2.5 seconds.Find avg. velocity of this particle. Homework Equations vector AB = (x2-x1)i + (y2-y1)j...

if a ball is thrown and caught at the same height with constant horizontal velocity and no vertical displacement is its initial and final velocity the same? since v2y^2=v1y^2+2aDy, no displacement means final vertical velocity will be the same as initial, since v2x=v1x, horizontal velocity...

Homework Statement A 230 kg crate hangs from the end of a rope of length L = 12.0 m. You push horizontally on the crate with a varying force to move it distance d = 4.00 m to the side (Fig. 7-43). (a) What is the magnitude of when the crate is in this final position? Figure...

Homework Statement I'm a bit confused by a question asking me to work out the power of a bike traveling up an inclined plane with a constant speed. I have the mass and friction and the speed but no displacement so I don't know how I could work out power if to find the work I need to factor...

Suppose the dielectric material is fixed in position and filling the capacitor, and you would have this term in the way of calculating something. \int\nabla\cdot\left[\left(\Delta{D}\right){V}\right]{d}\tau where D is the dielectric displacement Now that turns into (by divergence...

Homework Statement An electron with a speed of 1.9 × 107 m/s moves horizontally into a region where a constant vertical force of 4.3 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the time it has moved 34 mm...

Homework Statement An inclined plane of angle θ = 20.0° has a spring of force constant k = 460 N/m fastened securely at the bottom so that the spring is parallel to the surface as shown in the figure below. A block of mass m = 2.55 kg is placed on the plane at a distance d = 0.288 m from the...

Hey, I have a very easy problem. A dancer completes 2.2 revolutions in a pirouette. What is her angular displacement? here's my work. Given: 2.2 revolutions. Battle Plan: Find angular position in radians. Subtract final position with the initial position. Outcome: 2.2 x 2pi = 4.4 pi...

Hi I have already solved the problem. I just have some doubts about the solution given in the solution manual. This is "Physics for scientists and engineers" by Serway, Jewett In the solution for part b) , the author has taken the area of whole Amperian loop while calculating the electric...

Homework Statement Amadeus pushes horizontally on a desk that rests on a rough wooden floor. The coefficient of static friction between the desk and the floor is 0.800 and the coefficient of kinetic friction is 0.620. The desk has a mass of 94.0 kg. He pushes just hard enough to barely get the...

Homework Statement In the above problem, Amadeus pushed horizontally on a desk that rests on a rough wooden floor. The coefficient of static friction between the desk and the floor is 0.800 and the coefficient of kinetic friction is 0.620. The desk has a mass of 94.0 kg. He pushes just hard...

Homework Statement An orienteer runs 5km east, 4 km south and 1km west. If she completed the course in exactly 1 hour, calculate her displacement from the start. Homework Equations There were questions before it I've already answered but I am not sure if I can do this question through...

Homework Statement The 30mm diameter A-36 steel rod (E=200x10^9 Pa) is subjected to the loading shown. Determine the displacement of end A with respect to end C. (see attached picture) Homework Equations \delta = \frac{PL}{EA} (eq. 1) where delta is the deflection, P is the internal...

Homework Statement Andrew is driving his van to deliver groceries in Elmvale. As he travels along Hwy 92, a fox stops on the road. Andrew is traveling at 75 km/h [North] and is 42 m away from the fox when he applies his brakes. It takes him 3.4 s to stop. a) How far did Andrew travel...

Dear All, I have trouble to understand the calculation of phonon using small displacement method. I found people said the limitation of this method was that it requires the wave vector k orthogonal to the supercell size(?). Does it mean the wave vector is not any you want? why? I got really...

So I have been trying to figure out how much an object is displaced when subjected to certain frequencies. If I know the modal frequency and max displacement at modal frequency can I find displacement at any frequency? I was thinking maybe using ratios you could do the following, modal...

There is an attached image I couldn't figure out how to make it in the post. The attempt at a solution a) So I know that the direction of the velocity vector will be in the direction on the displacement vector from P to Q: 2i+5j+3k I also know that the magnitude of the velocity vector is...

Homework Statement Suppose we have a uniformly polarized sphere of radius R. The polarization vector is \mathbf{P}. Goal: To find the electric field everywhere. Homework Equations I know the actual solution already. It should be \mathbf{E} = \frac{-1}{3 \epsilon_0} \mathbf{P} The Attempt...

The A-36 steel rod is subjected to the loading shown. If the cross-sectional area of the rod is 50 mm^2, determine the displacement of C. Neglect the size of the couplings at B, C, and D. Please help, I don't have any idea how to begin. I can't seem to sum the forces right.

Homework Statement A car is driven east for a distance of 48 km, then north for 26 km, and then in a direction 30° east of north for 28 km. Draw the vector diagram and determine the total displacement of the car from its starting point and its direction. Homework Equations im not...

A boat which travels 100km[N], then 40km[N], and finally 80km [S]. The entire trip takes 6.5 hours. Calculate the total displacement of the boat d = d2-d1 d = (-80) - 140 d = -220 d = 220km[S] Just want to make sure this is correct. Thanks

Relative Motion-- Airplane vs radar station and tracking the displacement In Figure 4-49, a radar station detects an airplane approaching directly from the east. At first observation, the airplane is at distance d1 = 340 m from the station and at angle θ1 = 34° above the horizon. The airplane...

Hi! I can't wrap my head around the formula \textbf{D} = \epsilon \textbf{E} + \textbf{P}. The electric field, \textbf{E}, goes through the dielectric. It polarizes the atoms/molecules, which creates a field going the opposite way, which cancels out at least part of \textbf{E} (right?)...

Homework Statement A drag racer, starting from rest, accelerates to ¼ mile with a constant acceleration whose magnitude is 12.427 m/s2. At the end of the ¼ mile, a parachute opens, slowing the car down and bringing the car to a stop after 40 seconds. From the time the parachute opened, how...

Homework Statement A duck has a mass of 2.7 kg. As the duck paddles, a force of 0.13 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.20 N in a direction of 54° south of east. When these forces begin to act, the velocity of the duck is 0.13 m/s in...

We have 3 points. O, P, Q. OP = rP OQ = rQ but why is QP PrQ rather than QrP? I'm just starting M4 and I really like to understand everything. This doesn't make any sense to me and I can't find out online. I'm sure there's a logical reason for it to be like that. Is it because you go...

Homework Statement At time zero, a particle is at x = 4.0 m and y = 3.0 m and has velocity vector = (2.0 m/s)i + (-9.0 m/s)j. The acceleration of the particle is constant and is given by acceleration vector = (4.0 m/s^2)i + (3.0 m/s^2)j. a) Find the velocity at t = 2.0 s b) Express the...

Homework Statement A particle of dust is bombarded by air molecules and follows a zigzag path at constant speed v. (a)Assuming each step has a length d, find the distance traveled by the dust particle in time t. (b)What is the length of the displacement vector after N steps where N is large...

I understand that i should post all relevant work that I've done, but i don't even know where to start, in the serway 8th edition chapter 3 this problem is listed, i read all of chapter 3 yet still can't even attempt this problem. It's for my online homework which is due monday morning and was...

Homework Statement Consider the three displacement vectors A=(3i-3j) m B=(i-4j) m C=(-2i+5j) m Use the component method to determine (a) the magnitude and direction of the vector: D= A+B+C and (b) the magnitude and direction of: E=-A-B+CHomework Equations The Attempt at a Solution I did...

Homework Statement Assume you are on a planet similar to Earth where the acceleration of gravity is 10m/s^2 and the positive directions for displacement velocity and acceleration are upward. At t=0sec., an elevator is at a displacement of x=0 with a velocity of v=0m/s. A student whose weight...

Hi ! I have a intemediate calculus problem. I am seeing right now all about curves and motion curves. Homework Statement Show that 1. the path of a particle lies on a sphere if its displacement and velocity are always perpendicular 2.show that if the particle moves with constant speed then...

Homework Statement An electron is projected at an angle of 29.1° above the horizontal at a speed of 8.29×105 m/s in a region where the electric field is E = 378j N/C. Neglecting the effects of gravity, calculate the time it takes the electron to return to its initial height, the maximum height...

hi peoples... i have to design a small boat with a self draining deck. the boat has to be able to allow rain water to flow straight out above the water line. how do i work out where the waterline will be before i build the boat? and how do i calculate how high the deck should be? (depending...

[b]1. Homework Statement An aeroplane makes a round trip between two airports A and B located on the same line of longitude. On a windless day the aeroplane travels with constant speed v and the round trip time is T0. On the following day the same journey is made but there is a wind blowing...

1)What displacement must be added to a 50cm displacement in the +x-direction to give resultant displacement of 85cm at 25°? 2)A child is holding a wagon from rolling straight back down a driveway that is inclined at 20°to the horizontal. If the wagon 150N, with what force must the child pull...

]Hi Guys Can you help me with this : If a compressor with a displacement of 10 meter cube hour is displacing gas with a pressure of 10 bar, it is displacing 100 meter cube hour ?? (10 meter cube x 10 bar) rgds Marco

So suppose we have two dielectrics in contact and we want to know how \mathbf{D} varies across them, then we can use the fact that since \nabla \cdot \mathbf{D} = \rho_f and we have no "free" charges at the boundary then \mathbf{D} is continuous across it. So my question is, in Grant & Philips...

This is a very basic question, but I just started wondering about it. First which is the original quantity and which is the derived one. I mean is the displacement by definition is integral from a to b v(t) dt or is it the distance from the starting point to the finishing point or change in...

I was reading Kleppner and Kolenkow's An Introduction to Mechanics, and in one of the problems you're given a force vector as a fuction of time. You're given initial conditions and asked to compute velocity and position, then asked to find the cross product of position and velocity, that is rXv...

Homework Statement I am modelling the motion of a space probe and have some problems with obtaining velocity in terms of time v(t). I am given Q(z)=v2(z). Q(z) is a solution to ODE which I have solved with z being the independent variable. Homework Equations Q(z)= something really...

Homework Statement a ball is thrown upward with an initial speed of 80 ft/sec. Homework Equations how high is it at 3 seconds...? The Attempt at a Solution using the formula:h = Vo*t - 1/2 g*t2 where h as the height Vo is the original velocity g as the gravitational pull ...

Homework Statement During a bank robbery, one of the gangsters forgets a brick of gold on the roof of the car. Assuming that the car accelerates from rest with a constant acceleration, and that the brick was on the point of slipping, throughout the acceleration, how far did the car travel in...

http://img121.imageshack.us/img121/6590/mwsnap001.jpg The image above shows the question I'm stuck on. I've done the first part and got the force per unit mass to be -2wV'cos\lambda But I have no idea how to get the equation for the eastward displacement due to the Coreolis. Any...

Homework Statement The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.33 rad/s2. It accelerates for 23.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 67.3 s after it begins...