There is more to melting Antarctic ice than simply warming it up in situ. In simple terms: Antarctica is a very high plateau of ice which gradually flows to the ocean via the very extensive network of glaciers. The glacial ice melts (slowly) on contact with the ocean. As the ocean warms the rate...
This is not my area of expertise, but two possibilities spring to mind immediately.
1. No matter how good your vacuum pump is and even if you leave it to run for a long enough time to compensate for out-gassing from the chamber walls, there will always be a residual level of gas in the chamber...
In a previous life I was a bicycle frame builder. At the time most handbuilt bikes used steel tubing. One of the distinguishing features of bicycle tubing sets which set them apart from aircraft tubing was that the tubes were "butted". For the uninitiated this essentially meant that the wall...
The important bit in this is "...define matter...". Physicists don't usually define "matter", they talk about the properties of matter, which include mass and energy, (and spin... charge...). You can make a good argument that the only things that actually exist are the properties. At a particle...
The numbers quoted are slightly misleading when expressed in this way. Yes the Milky way is more massive than all dwarf galaxies; but it is run-of the-mill for spiral galaxies and less massive than average for elipticals.
Stellar formation is not really my area of expertise, but my understanding is that the "nett" angular momentum of the initial dust cloud is conserved. Which is to say that collisions between counter-rotating particles (opposite angular momenta) cancel most, but not all, of the apparent rotation...
"an infinitesimal addition would turn it into a Black hole."
Be careful about reading more into an article or paper than is actually there. The article says "with an accuracy of a few percent". A few percent could mean 5% and 5% of 2.16 solar masses is about 0.1 solar masses, hardly an...
Taking your question literally ("all the forces in play") there are three forces:
Gravity
Friction between tyres and road
Wind resistance
The net friction force will be due to the combination of motor; braking and the centripetal force required to turn the corner. If you ignore wind resistance...
Ah... yes. I see what I was missing. The barycentre position is a function of the inverse of the distance and the mass, the gravitational force is a function of the inverse of the square of the distance and the mass. So the net force and acceleration vectors point in the same direction but it...
Physicists and engineers would say "work" has been done on an object if its energy has been changed. That could be its kinetic energy, its gravitational potential, its heat energy ... So for your 1 kg object in space; if its speed has changed by 5 m/s (note: you said "accelerated to 5m/s2"...
What am I missing here? I can't conceive how the acceleration can point to any place other than the solar system barycentre. The acceleration vector is in the direction of the net force surely? And the net force always points to the solar system barycentre? (Simplifying to the extent that we...
Andrew;
Orbital mechanics is not my speciality so there is a limit to my understanding here. However, as I said, the problem is that word "orbits", whether it is qualified by the adverb "directly" or not. "Orbit" is a human description of the path of motion not a property of the body in...
A big part of the confusion here is that word "orbits". Another big part is the constant chopping and changing of frames of reference.
At any moment a body (star, planet, moon ...) will move with an instantaneous velocity and be subject to an acceleration due to the local gravitational field...
That depends on your definition of "directly". Katmandu is 27 deg north, Calbuco is 41 deg south; Katmandu is 81 East, Calbuco is 73 west. By my definition that is not even close.
Cheers