Relative Definition and 1000 Threads

1. Done in a lab: % difference: 0.679%, inherent error: 0.7%, % RAD: 0.941%. Anyway, I'm just having trouble interpreting what they mean in comparison to each other. What does the inherent error say about the % difference? And what does it mean if my %RAD is greater than my inherent error...

Homework Statement Consider a three dimensional rectangular infinite potential well with sides of length L, 2L and 3L. What is the energy of the first excited state relative to the energy of the ground state? The second state? The third? The fourth? Homework Equations...

2 ships, A and C are traveling on a parallel course, separated by some distance x. As their velocity is constant, I could say that they share an inertial frame of reference, or in other words are at rest wrt to each other. Their clocks have also been synchronised and I will assume for this...

Homework Statement I figured I'll try this again. A battleship steams due east at 24 km/h. A submarine 4.0 km away fires a torpedo that has a speed of 50 km/h. If the ship is seen 20º east of north, in what direction should the torpedo be fired to hit the ship? Homework Equations...

Homework Statement A battleship steams due east at 24 km/h. A submarine 4.0 km away fires a torpedo that has a speed of 50 km/h. If the ship is seen 20º east of north, in what direction should the torpedo be fired to hit the ship? Homework Equations x motion of ship: x = vt x...

Hi. I'm finishing my first year of Undergraduate CS with relative ease. We have the opportunity to take 30 credits worth of classes in another field of study (minor). I'm thinking of taking either an Applied Math or a Physics minor. For Math I was thinking about taking classes in abstract...

I was wondering if anyone had input into this question. Is the measured polarization of a beam of light relative to the frame of the observer? In the texts on Optics that I've read, there does not seem to be any reference to the observer's frame. It is only mentioned that light is...

Fg= Gm1m2/R2 and E=MC2(1/(1-(V2/C2)1/2))-MC2 So my question is, does the relative mass created by gamma,which I subbed for the relativity Equation in the above equation increase the gravitational pull that is exerted by a object near a body of mass? let's say we accelerated the moon to .99c or...

relative minus sign?? Hi, I have one question for you... to compute the matrix element for the process u d -> u d I want to use full SM, but I have one problem I'll give you the maths. process with W: <ud|(\bar{Ψ}u Ψd)(\bar{Ψ}dΨu)|ud> process with γ: <ud|(\bar{Ψ}u Ψu)(\bar{Ψ}dΨd)|ud> Z and...

Hi- I'm trying to calculate the effect of a magnetic field on some spectral lines. I know that each energy level will split into 2J+1 sub levels (each denoted by Mj). I can calculate the energy level splitting and using the selection rules (dJ = 0, +/-1, dMj = 0, +/-1, dL = 0, +/-1), I...

Homework Statement Find the relative extrema of the following function f(x) = (a-x)/(x2-a2) where a is a constant, a>0 Homework Equations Derivative of f(x), zeroes, quadratic formula The Attempt at a Solution I think I just screwed a small step in there because my answer doesn't...

Homework Statement Sketch the graphs of the following function showing vertical and horizontal asymptotes and relative extrema: f(x) = (x2-1)/(x2-4) Homework Equations Limits, zeroes, derivatives The Attempt at a Solution I know that I have the majority of the answers right, the...

Why is it that things appear smaller the farther they are away and bigger the closer they are away? It is almost as if the magnitude of their dimensions (length, width, and height)changes. But in reality it is still the same object. My cup x distance closer to me than the door may appear 1/6th...

Homework Statement given a package on a conveyor belt running at a constant veloctiy of 1.5m/s, 1.8m away from the origin. the conveyor belt is rotating origin as a pivot at angular velocity 6 rad/s. it rotates on z axis. calculate the relative velocity of the package from origin (Vp/0) and V...

Homework Statement The wind is blowing from west to east at 35.0 mph, and a bird in that wind is flying at 22.0 mph relative to the air. What is the magnitude of the velocity of this bird relative to a person standing on the ground if the bird is flying from west to east relative to the...

Hi All, Sorry perhaps for a stupid question, but I am pretty confused by this one... Suppose I have two different smooth functions, f(x) and g(x) both defined on a closed interval [a,b]. How do I calculate the average relative distance between the all values of these functions (say relative...

Homework Statement A cosmic ray travels 60km through the Earth's atmosphere in 400μs, as mesured by experimenters on the ground. a. Calculate the relative velocity between the cosmic ray's intertial reference grame and the Earth's inertial reference frame. b. How long does...

Hi, I got the answer to this question wrong; I'll show what I did so you guys can help me spot my misconception: A cyclist A moves with speed 3.0 m/s to the left (with respect to the road). A second cyclist B, moves on the same straight line path as A with a relative velocity of 1.0 m/s...

Homework Statement A laboratory experiment shoots an electron to the left at 0.9c. What is the electrons speed relative to a proton that is moving to the right at 0.9c? I have no idea how to attempt this problem i know the answer is -.0994c but I am not sure how to get this answer?

Homework Statement The attempt at a solution I used the concept of relative motion analysis for velocity: VB = VA + VB/A (4) = (-2) + ω(3) ω = 2 rad/s (CCW) Is this correct?

Homework Statement Suppose the river is moving east at 5 km/h and the boat is traveling 45 degrees south of east with respect to earth. Find (a) the speed of the boat with respect to Earth and (b) the speed of the boat with respect to the river if the boat's heading in the water is 60...

Suppose we have two ships A and B in uniform motion according to each other(A claims B to in motion and B claims A to be in motion). Let each one of the objects have a roll of rope on it (let us call the ropes a-> for A's rope and b-> for B's rope). Now when the ships were initially close to...

if the universe was the size of my laptop, and i moved my hand over my laptop from one end to the the other in let's say ... 1 second . relative too the universe my hand would have moved millions of times faster than the speed of light. Why is this? is speed relative to size?

Let's say you're mass is 100kg and you're traveling at 0.9C. The relativistic effect on your mass is roughly 2.3 so you now have a mass of 230kg. If you went whipping past me, would you appear to have a mass of 230kg or 100kg? Seems like a no-brainer. But it keeps tripping me up! TIA...

Two spaceships are traveling relative to Earth (stationary). One spaceship is going to the right at 0.8c the other is going to the left at 0.8c. Could you say their relative speed to one another is .8c+.8c? I'm thinking not since you can't possible go faster then the speed of light, doesn't...

Homework Statement Two spaceships are traveling relative to Earth (stationary). One spaceship is going to the right at 0.8c the other is going to the left at 0.8c. a. What is their relative speed to one another? b. what is their relative size? Homework Equations The Attempt at a Solution

drunken musings... if i was sat on the wing of a jet traveling at mach2 would i be able to hear the the noise of the engine behind me?

I would like to see some comments on this observation that appears to lead to an ambiguity re: time dilation: The usual definition for time dilation is the expression: t =t'/(1-V^2/c^2)^1/2 where an individual in the unprimed coordinate system "at rest" in empty space, sees a clock in the...

Homework Statement Let B = {b1, b2, b3} be a basis for a vector space V and T : V -> R2 be a linear transformation with the property that T(x1b1 + x2b2 + x3b3) = 2x1 - 4x2 + 5x3 0x1 - 1x2 + 3x3 Find the matrix for T relative to B and the standard basis for R2. Homework...

Just a thought experiment... Cover a metal plate with a material of relative permittivity 0 on one side. Then place a charge on the metal plate. The system as a whole will accelerate towards the metal side since there is no flux on the covered side and so the charge is accelerated in the...

I apologize if this comes off as a dumb question, but does anyone know if gravity is ABSOLUTELY simply dependent on density alone, regardless of the type of material itself, or does the type material also factor into it's gravity?

Hello everyone! Something about speeds and how they're supposed to be relative has been bugging me for a while. I'm not particularly well-versed in physics, so if these questions make you cringe ... well, sorry about that. ;) So here goes - it is said that speeds are relative, right? If you...

Equation of a Surface relative to the standard basis is X1^1 + 2X2^2 + 3x^3 -4x1x2 -4x2x3 =0 Now the question ask to find the equation of above surface relative to the cordinate system with basis vectors F1= (2/3,2/3,1/3) F2= (1/3,-2/3,2/3) F3= (2/3,-1/3,-2/3) Now i found the transition...

as we know at zero degree temp. water condense to form ice. so what will be the relative humidity of a chamber at a temperature below zero degree temp.? will it be nagative or what?

Homework Statement Find constants a, b, and c such that the graph of f(x) = ax2 + bx + c has a relative maximum at (5 , 12) and crosses the the y - axis at (0 , 3). Homework Equations Not sure what to use The Attempt at a Solution -- i don't have one --

(This isn't a homework problem, just something I've been thinking about.) Suppose we have two planets isolated in space separated by a distance "D." They exert a gravitational force on each other which changes as they get closer. If we were in the accelerating reference frame of one of the...

Homework Statement A particle as observed in a certain reference frame has energy 5GeV and momentum 3GeV. what is the energy in a frame in which its momentum is equal to 4GeV/c? what is its rest mass? what is the relative velocity of the two reference frames? Homework Equations The Attempt at a...

I explain my question through an example. If we brought down a GPS clock, would it show the normal time, because it was accelerated before launch, but it has been slowed down by time dilation? Or we have to accelerate those clocks in order to compensate for the time loss, till the signal from...

Two objects X and Y are moving away from Point P. The diagram I linked shows it. It then asks us: Which of the following velocity vectors represent the velocity of X relative to Y. The answer is B, but the same book told me in another part that we should subtract vectors to get the...

I think I may have asked this before, but I don't think I received a reply that made sense, at least to me. Does the gravitational force between distant galaxies become larger and more significant due to their Relativistic Mass at high relative velocities and especially at luminal and...

Homework Statement A man on a moving train throws a ball at a parked car. Find velocity of the ball when it hits the car if: train is moving 21 m/s North East; the man is walking 3.0 m/s [E35S] (relative to train) ball is thrown 10.0 m/s [W22S] (relative to man) Homework Equations VBG...

I just read the following innocent sounding statement, which got me thinking: "An electron in motion relative to an observer generates a magnetic field..." This implies that, for an observer moving alongside at the same speed as the electron, there is no magnetic field. I understand the...

Would someone please correct my train of thought on this? I understood that the Earth's position in the Solar System is related to the gravitational attraction between the Earth and the Sun. If this thought is correct, then when the Sun enters its Red Giant phase, the Earth should be pushed...

I am a piano teacher with some very cool, science-minded students. Usually we stick to basic acoustics, and mechanics in terms of piano technique, but yesterday one of them took things in an interesting new direction. . . he described to me how, when he closes his eyes and listens to the music...

Homework Statement A plane has an airspeed of 200 mph. The pilot wishes to reach a destination 600 mi due east, but a wind is blowing at 10.0 mph in the direction 10.0 degrees north of east. In what direction must the pilot head the plane in order to reach her destination? ______________...

consider a housefly in a car moving with a certain vel...how does it manage to move with the same speed as that of the car even though it isn't in contact with the car itself??...as in does it spend its own energy to move at quite high speeds (considering its small size and energy)??...

Something must be wrong with my reasoning in the following thought experiment. Can someone, please, point out my error. This thought experiment involves an empty cosmos which contains three space craft. Two of these, piloted by those intrepid adventurers Alice and Bob, are twenty...

Relative Velocity Problem -- find the angle Homework Statement An airplane has a cruising speed (speed of plane with respect to the air) of 547 mph. The wind is blowing at 84 mph 40° north of east. The plane needs to fly from Geordi to Data, which is 982 miles at 28° west of north. Part A...

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...

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...