What is Relative: Definition and 1000 Discussions

In music, relative keys are the major and minor scales that have the same key signatures (enharmonically equivalent), meaning that they share all the same notes but are arranged in a different order of whole steps and half steps. A pair of major and minor scales sharing the same key signature are said to be in a relative relationship. The relative minor of a particular major key, or the relative major of a minor key, is the key which has the same key signature but a different tonic. (This is as opposed to parallel minor or major, which shares the same tonic.)
For example, G major and E minor both have a single sharp in their key signature at F♯; therefore, E minor is the relative minor of G major, and conversely G major is the relative major of E minor. The tonic of the relative minor is the sixth scale degree of the major scale, while the tonic of the relative major is the third degree of the minor scale. The minor key starts three semitones below its relative major; for example, A minor is three semitones below its relative, C major.


The relative relationship may be visualized through the circle of fifths.

Relative keys are a type of closely related keys, the keys between which most modulations occur, because they differ by no more than one accidental. Relative keys are the most closely related, as they share exactly the same notes.

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  1. Quarlep

    What is the formula for calculating relative velocities in Special Relativity?

    Lets suppose three objects O,A and B are set up in universe and nothing else.Then O seems A is moving 0.3c And B is moving 0.5c .In Special Relativity we have relative velocities formula I want to formule it but result seems absurd can you find me all possible velocities I mean A, O and B...
  2. marellasunny

    Front crash with crumple zone: relative velocity calculation

    EURONCAP front crash test involves crashing a car moving at 64 kph onto a deformable barrier at 40% of the total vehicle width. According to the EURONCAP website, this is equivalent to two vehicles crashing into each other at 55 kph. How did they arrive at this figure? I presumed that the...
  3. 2

    Deriving the doppler shift equation for sound

    I am looking at derivations of the Doppler effect for sound and light, and I am very confused about what stays the same when it comes to sound. In this video, at 5:10, it is said that the wavelength will be the same. I'm not sure I agree with this because I'm pretty sure both the observed...
  4. N

    Time Dilation and Relative Time

    I was reading in Clifford M.Will's book "Was Einstein right? Putting General Relativity to the Test" that there was an experiment done where in October 1971 an experiment was done with radioactive clocks, and plane trips taken going with the spin of the earth, and against it. He reports: "The...
  5. Prashasti

    Relative stability of ortho and para isomers

    Generally, in organic reactions, the para isomer is found to be more stable (as it is symmetrical) because of which it is produced in greater amount than the ortho isomer. However, there are some exceptions also, for example, in some reactions the less sterically hindered ortho isomer is...
  6. S

    Derive Particle Speed in Terms of Invariant U.V | Relative 4-velocities Homework

    Homework Statement In a particular inertial frame of reference, a particle with 4-velocity V is observed by an observer moving with 4-velocity U. Derive an expression for the speed of the particle relative to the observer in terms of the invariant U · V Homework Equations...
  7. A

    Understanding Relative Velocity: Explained in Simple Terms

    Umm, so as far as I understand velocity is speed in a direction. So if I'm going North at X Km/h and another guy goes south, he'll go at -X Km/h. So anyways, the formula for relative velocity, for example V(AB) is V(A)-V(B). So let's say two trucks are going at 70 m/s towards each other...
  8. S

    4-momentum and relative velocity

    Homework Statement In a particular frame of reference a particle with 4-momentum ##P_p## is observed by an observer moving with 4-momentum ##P_o##. Derive an expression for the speed of the particle relative to the observer in terms of the invariant ##P_p.P_o## I am completely stuck on this...
  9. U

    Lorentz Transformation of relative velocity

    Homework Statement If two particles have velocities u and v in frame S, find their relative speed in frame S'. Homework EquationsThe Attempt at a Solution Isn't it strange that the relative speed doesn't depend on the velocity of the frame, ##\vec s##? Since the two particles have velocities...
  10. S

    Relativistic relative velocity of particles

    Homework Statement In a given inertial frame two particles are shot out simultaneously from a given point with equal speeds u at an angle of 60 degrees with respect to each other. Using the concept of 4-velocity or otherwise, show that the relative speed of the particles is given by ##u_R =...
  11. R

    Relative permittivity of a semiconductor material

    http://physics.stackexchange.com/questions/156708/can-the-relative-permittivity-of-a-semiconductor-material-be-lower-than-1 To measure the relative permittivity of a p-type semiconductor material (a metal phthalocyanine ) , a M-S-M structure was made by thermal evaporation method. The...
  12. R

    Comparing the Cost of High Temperature Alloys for Sodium Chloride Applications

    Does anyone have an approximate idea of the relative cost of the following allows / metals: Titanium SS904L 2205 Duplex Steel 6Mo (Super Austentic Stainless Steel) Alloy 400 SS316L (just as a convenient reference price) Of course, I'm not looking for accuracy just approximate price ratios...
  13. Quarlep

    General Case of Relative Velocities

    I was looking relative velocities and I saw General case in Relativity part.That part means every direction isn't it. http://en.wikipedia.org/wiki/Relative_velocity and in there B is the observer or A is the observer Thanks
  14. T

    Close to the speed of light relative to what?

    Hi, We know that gravity affects time and the presence of big masses such as planets will cause big distortions in spacetime which slows things down (if I'm floating in space, won't I be distorting spacetime for.. say.. an ant? Won't the ant gravitate towards me?). Anyway. we know that...
  15. J

    Why is the relative atomic mass always changing?

    And why the range of changing is different when we use different atoms as standards?
  16. J

    Why hydrogen is not used to compare the relative atomic mass

    Is that because of some historical reasons or E=mc2(i mean something about binding energy)?
  17. S

    Question about Space -- Is Space itself a 4th dimensional object?

    Ok, so I was just in physics class today and we were talking about special relativity... anyways, the instructor referred to how the universe is expanding, and so much so that there are places we could never ever get to because it's expanding fasterling than the speed of light. Anyways, this...
  18. ajlen

    Mybe stupid but i would like to know (vehicles in relative motion)

    So we have moving truck at 100mph, on truck is truck moving 100mph, then on this truck is truck moving 100mph, and on this truck is car moving 100mph. Then the last car is moving 400mph in space but only 300 from first truck?
  19. J

    Confusion with Relative Extrema and Intervals

    I've been watching the Khanacademy videos on Calculus and in this video, at 4:18: He talks about relative minima and maxima in an interval. He says that the relative extrema can't be at the endpoints. As far as I understand, in that case the interval would have to be an open one, but my...
  20. gracy

    Relative velocity of river swimmer

    in swimmer-river physics problems ,velocity of swimmer in still water=velocity of swimmer with respect to ground OR velocity of swimmer in still water=velocity of swimmer with respect to river which of these is correct .I am really confused.
  21. F

    How Can Relative Permittivity Be Measured in the Stratosphere?

    So I am a 17 years old student who is interested in electronics and programming them (I am expirienced with Arduino). I and my friends decided that we will join a competition for all technical schools in my country. The goal of the competition is to make a project that will do something while it...
  22. P

    Relative positioning sensor question (With Picture)

    So I've been researching whatcould be the sensor/s that would do what the picture depicts: I have camera A behind camera B. What I'm trying to achieve is: to point the position of camera B when B passes on the field of view of A. When B pases in front of camera A the Screen of camera A will...
  23. mpx86

    Clocks and their relative speeds

    Homework Statement A watch gains 3 minutes every hour. If it is set right at 11 a.m. on February 21st, 2012, when will the hour hand of this defective watch and a correct watch be at the same position? A) 9 p.m. on February 21st, 2012 B) 11 p.m. on February 28th, 2012 C) 11 a.m. on March 2nd...
  24. C

    Relative distances (motion problem) --

    Homework Statement In a collision, an automobile initially traveling at 50 km/h decelerates at a constant rate of 200 m/s^2. A passenger not wearing a seat belt crashes against the dashboard. Before the collision, the distance between the passenger and the dashboard was 0.60 m. With what speed...
  25. P

    Relative angle between two balls with equal mass after collision

    I´m working on a physics hand-in and found the relative angle between the two balls after collison(where one is stationary before the collison) to be exactly 90degrees, is this random or is it always so? It´s worth mentioning that total momentum and kinetic energy is conserved. The hand in is...
  26. K

    Is All Motion Truly Relative to Space?

    Why can't motion be relative to space?
  27. B3NR4Y

    Relative Speed of Two Masses Connected by a Rod

    Homework Statement The system shown in consists of two balls A and B connected by a thin rod of negligible mass. Ball A has three times the inertia of ball B and the distance between the two balls is ℓ. The system has a translational velocity of v in the x direction and is spinning...
  28. S

    Calculating Required Heading for North-East Sailing with Current at 5km/h

    Homework Statement A ships captain wishes to sail his ship north -east. A current is moving his ship with a velocity of 5.0km/h . If the ship has a maximum speed of 30 km/h what is the ships required heading? Homework Equations Cos angle=A/H The Attempt at a Solution Heading=cosine (5/30)...
  29. G

    Understanding the Relative Velocity of Particle Beams

    How come relative velocity of the beams can be expressed by v_{12} = \left| \vec{v}_1 - \vec{v}_2 \right| = \left|\frac{\vec{p}_1}{E_1} - \frac{\vec{p}_2}{E_2}\right| where \vec{p}_{1,2} and E_{1,2} is the momenta and energies of incoming particles, respectively? Similar equation is in Peskin &...
  30. andrewkirk

    Abuse of notation in relative homology theory

    I am refreshing my understanding of homology theory (well, recreating from scratch really!) after a thirty year break and there's something that bugs me in how the texts I've seen write about relative homology. The relative homology module ##H_q(X,A)## is defined as ##ker\ \partial_q^A/Im\...
  31. G

    Does the speed of sound depend on the observer's relative motion?

    Hi, I wanted to ask if the speed of a sound wave, given a fixed medium, depends on the speed of the observer. That is to say, does the speed of sound obey to the laws of relative motion, implying addition of relative speeds? In case it doesn't depend on relative motion, can you explain why? I...
  32. K

    Velma and Mort relative motion question

    Homework Statement 1. Velma passes Mort at a speed of 0.75c. At this speed, the "time dilation factor" is 1.5. In other words, Mort observes a 1-second tick of Velma's clock to take 1.5 seconds. Suppose that they are born at the same time, and that Mort observes himself to live 30 years. As...
  33. K

    Special relativity and relative motion question

    Homework Statement Hello all, I have a couple of questions that I am a little unsure of. Could you please let me know if my answers are correct? But more importantly could you let me know if my reasoning is correct? Thanks in advance! 1. Mort stands on Earth. Velma moves away from him in a...
  34. Hijaz Aslam

    Relative velocity of accelerating and non accelerating particles

    Q. Two particles start simultaneously from the same point and move along two straight lines, one (particle A) with uniform velocity v and other (particle B) with a uniform acceleration a. If ##\alpha## is the angle between the lines of motion of two particles then the least value of relative...
  35. Hijaz Aslam

    Is relative velocity confusing in multiple vector systems?

    Are the vectors resolved correctly? I get a different answer to this question(well my diagram itself is different). How can ##\beta## be greater than ##\alpha##? Isn't it that here ##\alpha## should be in place of ##\beta## and ##\beta## in place of ##\alpha## and both ##V(rain,woman)## and...
  36. M

    On partitioning an even number into a pair of (relative) primes

    An example:For m= 176 (132<176<172 one finds r=(3-2)x(5-2)x(7-2)x(11-1)x(13-2)=1650 relative primes (0<v<2x3x5x7x11x13), forming 825 asymmetric pairs, among them four partitions into prime numbers:19+157, 37+139, 67+109, 73+103, 79+97.
  37. ellipsis

    Is distance between particles relative? Poincare invariance?

    If you shift the universe five meters to the left, there is no observational change. If you rotate the entire universe, the inertial frame is also rotated, and there is no observable change. If you freeze time in the universe for one billion years, then resume it, there is no observable...
  38. B

    Vectors and finding relative speed

    Homework Statement Find Particle A's speed with respect to Particle B. I am given: Particle A: (15i - 10j) or 18.03 m/s angle A: -33.69 degrees Particle B: (5i + 15j) or 15.81 m/s angle B: 71.57 degrees (Both angles with respect to x axis) Homework Equations Had there not been any angles, I...
  39. K

    Path of a ball thrown radially from a satellite orbiting Earth

    Homework Statement A satellite has a circular orbit 500 km above earth. A ball is thrown directly downwards radially at 20 m/s. Find the path of the ball relative to the satellite. Homework Equations mv^2/r=GMm/r^2 The Attempt at a Solution From the height of the orbit you can easily solve...
  40. P

    Stoichiometric Coefficients and Relative Concentrations

    For a simple equilibrium or non-equilibrium chemical reaction, while I understand that the ratio of the coefficients of each reactant/product is mathematically equal to the molar ratio, I am not quite sure whether or not it is equal to the ratio of concentrations of each component in the...
  41. T

    Find the relative permittivity

    Consider a commonly-used capacitor made from two circular parallel plates with a ceramic dielectric between them. The plates have 12.5 mm diameter and the whole thing is 3 mm thick with a capacitance of 10 nF. Neglecting the finite thickness and extent of the plates, what relative permittivity...
  42. F

    Relative humidity and the science behind cigar storage

    I recently got heavier into cigar smoking and want to start storing cigars at home in a humidor. Like most things that become a sort of hobby of mine, I research the hell out of my new fascination. So while learning about humidors, I discovered that the cigar community is split on whether or...
  43. O

    Relative motion of a cannonball/submarine

    Homework Statement 1.) A projectile is fired from a submarine traveling horizontally at 20 m/s with respect to the water as shown in the figure below. According to an observer on the submarine, the projectile is fired at 45° with an initial velocity of 60 m/s. After firing the projectile, the...
  44. Fantini

    MHB Relative velocity with respect to a specified coordinate system

    Hello all. I didn't know whether this fit pre-university math so I posted here. This is exercise's 1.15 from Kleppner & Kolenkow. By relative velocity we mean velocity with respect to a specified coordinate system. (The term velocity, alone, is understood to be relative to the observer's...
  45. T

    Universe Age: Why Is There a Set Number?

    If this is true, why is there a set number of years that the "universe" has existed for? Aren't different parts of the universe traveling at EXTREMELY different relative speeds? Doesn't this mean that the universe is a different age depending on your location in the universe, which you are of...
  46. K

    How the velocity of rain relative to the driver in car increases?

    How does the velocity of the rain with respect to the car get added up? Velocity of rain with respect to man is given by the (velocity of rain wrt ground - the velocity of car wrt ground). Here it's not being added up!
  47. W

    Is theory of relativity really relative ?

    Einstein made the theory based on Maxwell saying that electromagnetic waves travel with same speed from the view of all inertial & non - inertial frame. Then with what speed relative to a person sitting on light does light travel ?
  48. K

    Relative Velocity of Stone?

    Homework Statement A stone is dropped from a balloon at an altitude of 300 metres. How much time is required for the stone to reach Earth if: (1) Balloon is ascending with a velocity of 5 m/s, (2) Balloon is descending with a velocity of 5 m/s (3) Balloon is stationary Disregard air...
  49. K

    What is the Average Velocity of a Ship and the Velocity of the River Current?

    Homework Statement A ship goes from A to B at v_1=10 km/h and from B to A at v_2=16 km/h Find: (1) the average velocity of the ship, and (2) the velocity of the river current. Homework Equations v_{avg}=(v_1+v_2)/2 v_{AC}=v_{AB}+v_{BC} The Attempt at a Solution...
  50. D

    What Is the Wind Velocity Affecting the Light Plane's Course?

    A light plane is headed due south with a speed relative to still air of 185 km/h. After 1 h, the pilot notices that they have covered only 135 km and their direction is not south but 75˚ south of east. What is the wind velocity? I know I have to set up a triangle and solve...
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