Thanks a lot! :cool:
I am currently reading my first book by Susskind, the easy and highly enjoyable "The Black Hole War", and I am very eager to follow these lessons!
The charges which are free to move in metallic wires are electrons. A current in a metallic wire is therefore a flow of electrons.
The lines of an electric field show the direction of such field at any point in space, and therefore the direction of the corresponding force that would act on a...
Or perhaps in this case the container is always and only where matter (or energy) is or has been, and therefore matter can never cross its boundary, because the boundary is defined by matter.
If you can communicate "perfectly", then you also talk about specific aminoacids without the need to pass samples.
The fact that their biology or the lifeforms on their planets may be working differently however stands as an obstacle.
IMHO, you are overcomplicating.
You can also figure out what is the angular momentum of the system M1+M2 relative to its own center of mass (not "CM") one instant before the rope is cut. Such momentum is not zero, and is conserved after the cut.
Uhm...
I think the rope is just as good. The only difference (not considering needlessly complicating issues like rope linear elasticity) is that if the 2 masses were going towards each other, the rope wouldn't prevent it and the distance between M1 and M2 could become less than the original...
Some organic molecular compounds have significant difference in their chemical/physical properties depending on whether the molecule (otherwise with exactly the same atoms and chemical bonds) is shaped clockwise or counterclockwise.
Perhaps this can be used, if the two races have some shared...
I think yes, they do spin.
An instant before the break, M1 has a tangential speed v1, and M2 has v2>v1. That should be the same an instant after the break, therefore M1 and M2 will start rotating around their center of mass while going away from the rest of the device.
The rest of the device...
But then, what is "work"? :wink:
Energy is the capacity to do work, and work is the effect of changing someone else's energy...
It's not so easy to define, just as it ain't easy to define "mass" or "charge". You can try to define mass in terms of how it resists being accelerated by a force...
Could you please spot where is the fault in this reasoning? I suspect that some of the relations may not be applicable and needs to be substituted with something else (or I'm just making a gross mistake as usual...):
Speed of light in a material:
c=\sqrt{\frac{1}{\epsilon\mu}}
where...
A loop of wire with current and a magnet are very similar from the point of view of their behaviour in an electric field.
It may help to thinkg of "poles" as just an abstraction and not something as "solidly real" as having shape and extension. In fact, the north and south poles are not...
I am more puzzled now...
If you manage to get a body that has exactly the same density as water, and therefore the weight of the water displaced is equal to the body's weight, according to Archimede's principle this body should float and neither fall or rise, right?
But the body being...
...and if you put a hair-thin sheet of material (lighter than water) underwater, and position it flat horizontally, then it should almost stay there (or at least rise very very slowly) because there is almost no pressure difference between the bottom and the top?
PS Neglect imprecisions, assume...
Sounds like a purely mathematical result rather than what physically happens tho...
If you really take a battery and connect its poles via an inductor, what happens? Does the inductor "extracts" all the energy from the battery, increasing the "stored" current linearly until the battery runs...