Having the hole at the side of the bucket does indeed change things, and my general feeling is that the water would come out of the side of the bucket.
However my question is, if the hole was at the bottom of the bucket, wouldn't it be more likely that the air would go up through the hole...
http://members.optusnet.com.au/donchichio/string.html
This was posted somewhere else in the forums, its a link where you can download the "Elegant Universe" movie. I'm not sure if its still working, but it worked for me a couple of weeks ago. Worthwhile to just check anyway.
In regards to...
Ok, if you want to be absolutely perfect, then yes, a mass isn't just going to appear out of nowhere. I was just merely trying to simplify the question.
"There are no lack of candidates in Einstein's Relativistic Universe. Powerful gravitational waves are thought to be generated by...
I don't really have an answer to your first question, but I do have another question about gravity, so I figure this would be the best place for it.
"Are the effects of gravity instant"
For example, if Earth is the only mass in the universe, then you add another large mass 2 light years...
I was just thinking about the mouse trap racer, and I guess there is a subtle way to increase your power even though it is actually cheating.
If you add a 30 cm rod to the mouse trap the energy will be released more slowly over a longer period of time.
However if you use a flexible 30cm...
Basically you have to make an object move the furthest distance powered purely by a mouse trap.
The main problem is to find a balance in the power of your vehicle. Basically what I mean is if you use a 4 inch string as suggested before you will get a racer that will accelerate for about 1...
Basically anything that bends space time will cause light to bend, therefore even a large sun will bend light even though it will not be to the same extent as a black hole.
I guess if you think of space time as a 2D sheet, then place various celestial objects with a large mass on the sheet...
This not really an answer, rather another question on the same topic. We all talk about gravity and most of us know how it works and can calculate it, if we are given the masses of the two objects and the distance between them. However I ask the question,
Why does gravity occur?
We know...
I don't really know much about birds however I may be able shed some light on the "apparent physics" that pulls along the more spent birds.
The same principle applies when you are going canoeing and a large boat goes past. Now the large boat creates a wave as it pushes through the water, and...
I am still quite sure that parabola is the right answer.
However Ambitwistor, is right in saying that "A hyperbola is not a rotated parabola".
However I did say it is "like" a parabola, but having done a little more research into it, a parabola isn't really like a hyperbola at all...
1. In relation to your first question about having magnitude and direction. The answer would be a vector.
2. If is only magnitude then it would be scalar.
3. When you say projectile, I am thinking something like a arrow being shot into the air and then travels in an arc of some kind...