This is a list of all the questions and their associated study carrel identifiers. One can learn a lot of the "aboutness" of a text simply by reading the questions.
| identifier | question |
|---|---|
| 11335 | The question must have occurred to many, what has all this to do with relativity? |
| 7333 | But what if the two- foot rule were to behave on the plane_ E_ in the same way as the disc- shadows_ L''_? |
| 7333 | Can we picture to ourselves a three- dimensional universe which is finite, yet unbounded? |
| 7333 | How can experience furnish an answer? |
| 7333 | How is this axiom to be interpreted in the older sense and in the more modern sense? |
| 7333 | How was unity to be preserved in his comprehension of the forces of nature? |
| 7333 | Now we put the question, What are the laws of disposition of the disc- shadows_ L''_ on the plane_ E_? |
| 7333 | So, will the initiated please pardon me, if part of what I shall bring forward has long been known? |
| 7333 | What do we wish to express when we say that our space is infinite? |
| 63372 | AND WHAT IS IT ALL ABOUT? |
| 63372 | And to what extent shall we be able to reconcile the results of one observer using one reference frame, and a second observer using a different one? |
| 63372 | And what, now, can be deduced from these very simple looking equations? |
| 63372 | But did you ever observe anything suggesting the presence of time in the absence of space, or vice versa? |
| 63372 | But is its result in agreement with actual experience? |
| 63372 | But is this not a relic of animism? |
| 63372 | But once more the question arises: What could be done by an optical experiment? |
| 63372 | But what about these axioms themselves? |
| 63372 | But which particular material reference- frame shall we use? |
| 63372 | But who shall define point in terms of something simpler and something which precedes point in the formulation of geometry? |
| 63372 | By its fruits the ether hypothesis justified itself; but does the ether exist? |
| 63372 | Can we tell whether we are moving through this ether, even though all parts of our apparatus move together, and at the same rate? |
| 63372 | Do objects on the earth, on this account, look larger to a moon observer than they do to us? |
| 63372 | Does it take longer to swim to a point 1 mile up a stream and back or to a point 1 mile across stream and back? |
| 63372 | How do we judge about it? |
| 63372 | How shall we determine whether this body is at rest, or whether it is moving at high or low velocity through space? |
| 63372 | How shall we finally determine this? |
| 63372 | How shall we prove it? |
| 63372 | How then can we talk about the relative duration of these intervals? |
| 63372 | If a train is 1,000 feet long at rest, how long will it be when running a mile a minute? |
| 63372 | If it does not, are we justified in still calling it a law of nature? |
| 63372 | If it passes a second observer at 60 miles per hour, what is its length as observed by him? |
| 63372 | If the laws begin to become, intricate, why not reshape, somewhat, the fundamental concepts, in order to simplify the scientific laws? |
| 63372 | Is it really impossible to distinguish between rest and motion of a body if we do not take into consideration its relations to other objects? |
| 63372 | Is the expression of natural law independent of or dependent upon the choice of a system of coordinates? |
| 63372 | Is there then in the chaos of observational disagreements anything which is independent of all observers? |
| 63372 | Is this geometry ever realized? |
| 63372 | Is this the only possible explanation? |
| 63372 | Is time eternal or finite? |
| 63372 | It is not an event about which the headline writers are likely to get greatly excited; but what of that? |
| 63372 | It is then in order to investigate the converse: if the lines are parallel to begin with, are the angles equal? |
| 63372 | May not our belief in the uniformity of time be due to the uniformity of the motion of all observers on the earth? |
| 63372 | Maybe the representation will be a distorted one, but who is to say which is the absolutely undistorted representation? |
| 63372 | Perhaps the curvature was introduced by some peculiarity of our reference framework? |
| 63372 | SUCCESSIVE STEPS TOWARD GENERALITY Is then our laboriously acquired geometry of points in a three- dimensional space to go into the discard? |
| 63372 | Shall we carry over our idea( b) to answer the next question:"To which material body shall we attach our framework?" |
| 63372 | So it is altogether sensible for us to ask:"Is the universe of space about us really Euclidean in whatever of realized geometry it presents to us? |
| 63372 | The natural question here, of course, is"Well, where are their time axes?" |
| 63372 | This is all very fine; but how does the geometer know what postulates to lay down? |
| 63372 | Time can no longer be regarded as something independent of position and motion, and the question is what is the reality? |
| 63372 | WHAT MAY WE TAKE FOR GRANTED? |
| 63372 | WHO IS MOVING? |
| 63372 | WHO IS RIGHT? |
| 63372 | We believe there are sound waves produced, and all that; but what of it? |
| 63372 | We think we understand this, but our understanding consists merely of the unspoken query,"Why, of course; what is there to prevent?" |
| 63372 | Well, how would we prove it if he told us that our space axes did not run in precisely the same direction? |
| 63372 | What do we mean when we say that a plane is two- dimensional? |
| 63372 | What is the essential peculiarity of an absolute frame? |
| 63372 | What may we conclude from this coincidence? |
| 63372 | What tells us that the second just elapsed is equal to the one following? |
| 63372 | Where shall we look for such a preferred coordinate system? |
| 63372 | Why should there be this limitation of the time- factor? |
| 63372 | Why, then, should that introduced by relative motion puzzle us? |
| 63372 | Why? |
| 63372 | ] 220[ Who is right? |
| 63372 | ]*[ But if the quantity$ E/ C^2$ is to be considered as an actual increase in mass, may it not be possible that all mass is energy? |
| 63372 | ]*[ For if we can not tell which of two bodies is moving, which one is shortened? |
| 60271 | And if not, why not assume that all lines drawn through a point outside a given line will eventually intersect it? |
| 60271 | Are there no outstanding difficulties? |
| 60271 | Are we to attribute the displacement to the gravitational field and not to the refracting matter around the sun? |
| 60271 | But are there such lines? |
| 60271 | But how do we know that the sun itself does not move with reference to some other body? |
| 60271 | But how much would the path of the projectile be bent? |
| 60271 | But if all things pointing in a certain direction are shortened to an equal extent, how are you going to notice it? |
| 60271 | But is there no relationship existing between the space and time of one body in the universe as compared to the space and time of another? |
| 60271 | But now if matter and light have the same origin, and matter is subject to gravitation, why not light also? |
| 60271 | But perhaps the moon itself has attractive power? |
| 60271 | But suppose I add that it is situated at Broadway and 117th Street, south- east? |
| 60271 | But then if the earth attracts the moon, why does not the moon fall to the earth? |
| 60271 | But what is beyond? |
| 60271 | But what is this ether? |
| 60271 | But what is this ether? |
| 60271 | But why should you? |
| 60271 | Can we not find something which holds good for all bodies in the universe? |
| 60271 | Did not Aristotle say that earth, air, fire and water constituted the four elements? |
| 60271 | Did not Ptolemy say that the earth was the center around which the sun revolved? |
| 60271 | Does the earth exert any gravitational pull on the moon? |
| 60271 | How do we know that our planetary system, and the stars, and the cosmos as a whole is not in motion? |
| 60271 | How does it appear? |
| 60271 | How will the time taken for light to travel in these two directions compare? |
| 60271 | If matter and light have the same origin, and if matter is subject to gravitation, why not light also? |
| 60271 | If one, two and three dimensions, why not four-- and five and six, for that matter? |
| 60271 | If water is the medium for the waves of the sea, what is the medium for the waves of light? |
| 60271 | If, however, there is no ether, or if we are to ignore it, how are we to get the velocity of bodies in space? |
| 60271 | In particular what can be done with respect to gravitational phenomena? |
| 60271 | Is it not, then, possible to regard the system of coordinates as at rest, and the centrifugal forces as gravitational? |
| 60271 | Is there no possibility of error? |
| 60271 | It may be asked, why does not a bullet continue moving indefinitely once it has left the barrel of the gun? |
| 60271 | It may well be asked, what bearing have these laws of Newton on the question of time and space? |
| 60271 | Must we then revise our ideas of an ether? |
| 60271 | Perhaps you think the attraction due to the air in between the magnet and iron? |
| 60271 | Probably the further up you go the less does the earth attract the apple, but at what distance does this attraction stop entirely? |
| 60271 | Still Another Victory? |
| 60271 | Suppose I say to you that the chemical laboratory of Columbia University faces Broadway; would that locate the laboratory? |
| 60271 | Suppose these two- dimensional beings were living on the surface of the earth; what could they see? |
| 60271 | Suppose we ignore the ether altogether, what then? |
| 60271 | To begin with, why should Einstein suppose that the path of a ray of light would be affected by the son? |
| 60271 | We say that it takes a"long time"to get from New York to Albany; long as compared to what? |
| 60271 | What Is This"Ether"? |
| 60271 | What charges give rise to light waves? |
| 60271 | What has nature to do with the coordinate systems that we propose and with their motions? |
| 60271 | What has this Albert Einstein done to merit such extraordinary praise? |
| 60271 | What is the explanation? |
| 60271 | What is this"something else"? |
| 60271 | What of the remaining 42 seconds? |
| 60271 | What was it? |
| 60271 | What would be the shape of its parabola? |
| 60271 | Where is the fundamental set of axes? |
| 60271 | Where is the rope that pulls the iron towards the magnet? |
| 60271 | Why did the planets move in just this way? |
| 60271 | Why is not the velocity of the planets reduced in time, just as the velocity of a rifle bullet decreases owing to the resistance of the air? |
| 60271 | Why not consider them both as brought into our equations by the agency of mathematical transformations? |
| 60271 | Why not? |
| 60271 | Why should there be to any other so- called"force,"which like centrifugal force, is independent of the nature of the matter? |
| 60271 | Why then is there any difference in the essence of the two? |
| 60271 | Why, then, question further? |
| 60271 | Will you apply the yard stick? |
| 60271 | Will you pass judgment with the help of your eyes? |
| 60271 | Would Einstein''s figures be confirmed? |
| 60271 | Would an apple reach the earth if thrown from the moon? |
| 60271 | Yet how can we conceive of the iron being drawn to the magnet unless there is some go- between? |
| 60271 | You may say, why not take our standard of time as the standard, and measure everything by it? |
| 60271 | [ 1] But what is this light? |
| 60271 | [ 5] Where Did Einstein Get His Idea of Gravitation? |
| 60271 | some medium not readily perceptible to the senses perhaps, and therefore not strictly a form of matter? |
| 60271 | that, in fact, not only the earth''s motion, but the motion of all the planets is regulated by the same means? |