Components Definition and 949 Threads

1. The problem A ball is thrown from a 19m building and hits the ground 98.2 m away. Gravity = 9.8 m/s2. Find the intial velocity as well as x and y components of the ball just before it hits the ground Homework Equations I found time=1.969149822.

Homework Statement A particle starts at t=0 at the origin of a coordinate system with a velocity of 1.32m/s in the negative y direction. There is acceleration on the particle of 2.47m/s^2 in a direction 35 degrees above the x axis. a) at what time does the y component of the particle's...

Metalogic-- atomic components in common for truth-functional entailment I'm trying to prove, assuming \Gamma is a set of sentences of SL-CN which truth-functionally entails P, that ~(\Gamma is consistent & P is not truth-functionally true (ie entailed by the empty set) & \Gamma has no atomic...

I am doing physics homework and I came upon a problem that I had forgotten how to do, and i do not believe my answer is correct. I have tried to Google this but failed, can you please tell me if i have done this correct? the question: "4. Give the horizontal and vertical components of...

I have a technical question about numerical relativity, hopefully someone can help. In the usual 3 + 1 decomposition in NR, the four gauge freedoms are expressed via the lapse, \alpha and three shift components \beta^i . In a finite element numerical scheme, each grid point will have a value...

Homework Statement With reference to Fig. 3 (not accurate), where the origin is at the centre of the image, if r1 = (0.10)î+(-0.80)j hat, and r2 = (-0.90)î+(0.10)j hat, what is the distance between the dots? Homework Equations Unsure. The Attempt at a Solution I'm not so good with these...

Homework Statement A radar station, located at the origin of xz plane, as shown in the figure, detects an airplane coming straight at the station from the east. At first observation (point A), the position of the airplane relative to the origin is R_vec_A. The position vector R_vec_A has a...

Homework Statement An airplane wishes to fly from A to B which is located 1000 km northeast of A. The maximum speed of the plane in still air is 650 km/hr. There is a wind blowing West of 40 km/hr In what direction should the pilot steer the plane to complete the trip as fast as possible...

Does anyone know of any sites where I can buy components like ICs or off-the-shelf stuff like resistors and capacitors in small amounts (<10, for example?). The only one I know of is jameco.com, and they don't have one of the ICs I'm looking for (LM2678T-12). Any others?

Homework Statement http://www.grabup.com/uploads/7800261909D120091B14DB13F106.png That's an image I have made of the diagram we are given. T1 and T2 are tension 1 and [/i]tension 2[/i] respectively. I need to work out the length of those by: a). Maths b). Scale Drawing Homework Equations...

Homework Statement A dolphin leaps out of the water at an angle of 32° above the horizontal. The horizontal component of the dolphin's velocity is 7.7 m/s. Find the magnitude of the vertical component of the velocity. Homework Equations Vy=V0y + ayt The Attempt at a Solution 4.63...

Homework Statement If Avec = (6.00 ihat -8.00 jhat) units, Bvec = (-8.00 ihat + 3.00 jhat) units, and Cvec = (26.0 ihat + 22.0 jhat) units, determine a and b such that a Avec + b Bvec + Cvec= 0. a= b= Homework Equations Avec + Bvec = Rvec Rvec = (Ax + Bx)i-hat + (Ay + By)j-hatThe Attempt at a...

Homework Statement http://img32.imageshack.us/img32/5364/325n.png The Attempt at a Solution I don't know how to approach this simple problem. I don't know what role A+B+C = -1.90i plays. Even if the vector of B is found, I don't understand how to find the components of B.

Homework Statement Vector C has a magnitude of 5.0 units and makes an angle of -90.0º with the positive x-axis, vector D has a magnitude of 7.0 units and makes and angle of –120º with the positive x-axis. What is the magnitude of the vector sum of C + D? - I am assuming that this means the...

Homework Statement Find the x, y, and z components of the vector A shown in the figure , given that A = 65 m. A link to the image: http://img401.imageshack.us/i/asdasp.jpg/ The Attempt at a Solution Y Component: 65m*cos(35) = 53.24m Z Component: 65m*cos(55) = 37.28m I think...

Homework Statement a ball is thrown up onto a roof, landing 3.90 s later at height h = 18.0 m above the release level. The ball's path just before landing is angled at θ = 67.0° with the roof. (a) Find the horizontal distance d it travels. (Hint: One way is to reverse the motion, as if on...

My question concerns my understand of the mechanics of the absorption of Photons by the components of atoms. I will use a common real-world example to facilitate my understanding of the concept. 1. When a rock (for example) sits in the sunlight, the rock warms to the touch. I believe this...

Help! I am losing my mind over this problem (which is basically problem 2.6.5 in Arfken and Weber Mathematical Methods for Physicists, sixth edition). I am having difficulty using the tensor symmetric and antisymmetric relationships of the Riemann-Christoffel tensor to show that it reduces...

Hey guys! I am back for a second time. (Woo) More Awesome Physics underway! Homework Statement The components of a vector V are often written (Vx, Vy, Vz). What are the components and length of a vector which is the sum of the two vectors, V1 and V2, whose components are (3.4, 1.0, 15.0)...

Homework Statement A room has dimensions 2.95 m (height) × 4.68 m × 6.19 m. A fly starting at one corner flies around, ending up at the diagonally opposite corner. (a) What is the magnitude of its displacement? (b) If the fly walks rather than flies, what is the length of the shortest path...

Is anyone familiar with materials which possesses a high tensile strength, but also a low young's modulus (high compliance)? I'm interested in a material which can support large deflections, while offering minimal resistance to it. Also, I'm specifically not interested in non-linear materials...

Homework Statement A 2.0kg object's momentum at a certain time is 10kg*m/s 37degrees vertically upward from due west. What are the components and magnitude of its velocity vector at this time (in a frame in standard orientation)? Homework Equations P=mv imp= dP The Attempt at a...

[b]1. A vector is 40.0 m long and makes an angle of 50.0° counterclockwise from the y-axis (on the side of the -x-axis). What are the x- and y-components of this vector? [b]2. Homework Equations Sin = opp/hyp Cos = adj/hyp [b]3. I tried solving for the x and y components of the...

Hi everyone! I am trying to self- study GR and I am (very slowly) working through Schutz at the moment ( not the clearest at times for a " first course" text). Anyway I have noticed that several times when working with components of physical variables e.g. momentum/ energy, the 'up' index in say...

Homework Statement You will be hiking to a lake with some of your friends. the map says you will travel 1.6 mi north then 2.2 mi in a direction 35 degrees east of north, then finally 1.1 mi in a direction 15 degrees north of east. how far will you be from where you started and what direction...

Given: at 70 pounds <60.02, -35> at 40 pounds <28.28, 28.28> at 60 pounds <-42.43, 42,43> now add the components to find the resultant of the system and use it to find the magnitude and direction angle. ----------------------> can anyone please explain it to me how to add the...

Hello, Can any experts give me some advice on the selection and calculation of infrared in control. I want to do a simple sensor control by PLC which utilize the infrared.When the receiver detects the infrared from the transmitter, the signal will trigger the PLC for some form of control...

Hello, for technical reasons I'm looking for a schematic of an Op Amp built with discret components and having GBP over 30 MHz.

What is the difference between, - Alternators - Generators - Dynamos - Rotors - Stators - Armature - Field - Commutators - Brushes. My mind is filling up with terms and I am struggling to make sense and define the difference between each! your help is appreciated.

if a body that is going in space in a straight line and suddenly 2 forces acts on it the first with the motion direction and the other is perpendicular to the motion direction , would the object start to go in circles ? or it will change its direction of motion and will keep going sideways ...

I have a apparatus with a thin electrode that is suppose to be parallel with surface beneath it. I can level the surface, but you cannot put a level on this electrode. I was thinking have like a block precisely made to the expected distance between the electrode and bottom to determine the...

As stated in title: I have full knowledge of the 2 signals. They have the same Power Spectral Density. However, only certain components of the 2 signals have the same phase. Is there any way of extracting these components, or at least their PSD functions? Is this doable at all? The phase I...

Ive recently completed a project in microcontrollers (my first project with uc's actually) and I built a power supply which gives me 12v and 5v dc. I use a transformer to step the voltage down to 12v AC from mains and then the 12v AC is converted to 12v dc using a bridge rectifier with a...

So I have an LC circuit at resonance except the capacitor gets very hot. There is about ~2Amps AC going across it. The setup is: 2x 0.1uF capacitors in parallel ~304uH inductor the ESR of the cap is 0.56ohms and the resistance of the inductor is ~0.7ohms. I was looking for the...

here is the question: http://i44.tinypic.com/xe53tc.gif here is the solution: http://i43.tinypic.com/2nuokfq.gif my first question regarding this whole thing is. why when the doing the partial derivative by "r" we don't multiply by minus the formula says (minus derivative) but all they do is...

Homework Statement A plane flies from base camp to lake A, a distance of 280km, at a direction of 20 degrees north of east. After dropping thr supplies, it flies to lake B which is 190km and 30 degrees west of north from lake A. Determine the distance and direction gtom lake B to the base...

Hi guys, I am a physics graduate, currently working in an experimental lab. Before coming here, I have no solid experience in lab stuffs. Anyway I enjoy working at lab a lot. The first task I have is to learn and master a programable DC source (Yokogawa 7651). To do this, I personaly think...

Okay, let's say there's vector a,b and c What would be the difference between projection of c on a and b and components of c along a and b I thought they were the same... thanks.

My Homework question is The stress components at a point are given by (image attached) units are in "Mpa (Mega pascal). calculate the strain components. Assume E= 200GPa and poisson ratio= 0.25. please guide me. formula to be used? thanks,

I'd like to breadboard a surface mount IC for testing. Is there some type of connector that can be purchased to plug the IC into which will provides wire leads for breadboarding? Failing that, I guess I could try to solder leads to the IC. But at 3mm x 3mm and 10 pins, I think that's next to...

Initial Velocity of Projectile given: - let theta be: B -equation for: (E1)horizontal component is x = vxt; where vx= v0cosB (E2)vertical component is y= y0 +vyt - (1/2)gt(squared); where vy = v0sinB using these components an equation of initial velocity{v0} =...

The tidal range of spring tides is about 3.2 m and tidal range of neap tides is about 1.8m, Assume the only tidal components are m2 and s2 tides. i.e 2 tides per day due to the sun and moon. Find the amplitude of these components and also find the maximum phase angle between the m2 tides and...

Homework Statement Using a coordinate system in whic x and y are due east and nort of the city and z is the radial distance outwards from te centre of te earth, find the compnents of w the Earth's angular velocity vector. You may assume that the latitude of the city is lamdba = 34degrees...

Homework Statement A hungry bear weighing 720 N walks out on a beam in an attempt to retrieve a basket of food hanging at the end of the beam. The beam is uniform, weighs 200 N, and is 5.40 m long; the basket weighs 80.0 N. a) When the bear is at x = 1.00 m, find the tension in the wire and...

Homework Statement I'm just working through a textbook and there's a line in which I'm clearly missing something. What I want to do is show that from: [tex] \bar{h^{TT}_{\mu \nu}} = A^{TT}_{\mu \nu} cos(\omega (t-z)) [\tex] to [tex] h^{TT}_{\mu \nu} = B^{TT}_{\mu \nu} cos(\omega (t-z))...

Homework Statement the boy of mass 40kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r=1.5m, theta=.7t radians, and z = -.5t m, where t is in seconds. Determine the components of force for F(r), F(theta), and...

Hi All, I am a beginner at Electromagnetics I'm implementing ray tracing SBR to predict propagation of waves. Each ray contribution will be in the form of: Ei = (some factors) e ^ (- j k r) u(theta, phi) where k = 2 pi / wavelength, r is the total unfolded path I'm not sure about...

6.60 -micro C particle moves through a region of space where an electric field of magnitude 1200 N/C points in the positive x direction and a magnetic field of magnitude 1.01T points in the positive Z direction if the net force acting on the particle is 6.23 x 10^-3 N in the positive x...

I have been given the following components to design a 4 to 16 decoder: I. One 3 to 8 decoder (with enable) II. Two 2 to 4 decoder (with enable) III. Two NOT gates IV. Two AND gates I just don't understand where the AND, NOT, and enables go into. I have attached two files One with the 3...

Hi! I'm writing a pool simulation program and have an awful problem with my ball collisions (elastic collisions). The theory (in terms of vectors) is that when two balls collide you take the line between their centers and the velocity components which are perpendicular to this line are...