Recent content by RK1992

you mean can a ladder fall from such a height and be expected to land in the ground? i don't think so.

the reason why things look bigger as you get closer is simple and it's just down to geometry. the angle an object subtends to your eye tells you how much of your vision it takes up (not sure why the inverse square law was being mentioned) the angle subtended can be found with simple, rough...

youve answered the question - youve differentiated what you were given. if you want to find dy/dx explicitly, you can try factorizing to get there.

edit: oops, ignore this

would you care to mark on the angles/lengths you know on a diagram? I am really not able to follow a description that well.

haha your example is hilarious :smile: i thought you handled it extremely well when somebody trying to be philosophical called you pedantic. you are much more patient than me! :-p

a magnetic field is basically a vector field. every point has a vector associated with it which tells you what force the field exerts on the particle and the direction of this force. you want to know what happens when you add vector fields - I am sure you know what happens when you add vectors...

im not really clear on what you mean? [PLAIN]http://img193.imageshack.us/img193/8507/wedgef.jpg you mean moving from one red point to another? could you tell us all the information you know? i expect you can do this question either with geometry or energy

well, black holes don't have zero volume. google the schwarzchild radius.

what are you talking about? if you move towards a source of sound at speed v, the speed of the sound waves relative to you is (340+v)m/s contrast this with light where if you move towards a torch with velocity v, the speed of the light waves relative to you is c m/s, the speed of light. the...

have you seen Newton's second law written in the form f=d(mv)/dt ? edit: oops, dead thread..

not at all, the argument itself is banned. you would be told off if you posted a tonne of scientific journals supporting global warming. also opinions can't be proven and QED is a pretty ridiculous thing to say there.

speed of sound depends on the density means its related to the density. the OP asked if the speed of sound was relative ie relative to the motion of the observer

thats not what the OP asked. youre explaining why the speed of sound is related to density. PS banned topic of discussion

interesting - a very similar question came up in a 1st year cambridge physics paper (http://www-teach.phy.cam.ac.uk/dms/dms_getFile.php?node=5735")