Hello everyone,
I am a physics teacher and off late i was pondering on just a general information about the spectral radiancy curve.
I wanted to know, who actually was the first one to do the experiments and make the plot. And in which year it was done.
I believe that unless the curve is made...
firstly, the particle is not rotating about point O it is just falling under gravity.
Secondly, let's look at another problem.
Q. Consider an Atwood machine with pulley having mass M, radius R and sufficient friction such that the thread doesn't slip on it. The masses on the two sides are m1...
Homework Statement
I am struggling with a simple point.
Suppose a particle of mass 'm' is located at (a, b) in XY plane (a,b > 0). Gravity is in -Y direction. The particle is to let fall under gravity. Suppose it falls by a height 'h' after some time 't'. I have two questions.
(i) What is...
I know it is a bit naive to ask in here.. but can anyone tell who was the first one to actually start talking about reference frame. Was it Newton or later development by some people of that era corrected Newtons law.
Historically i checked many places but no answers as of yet.
And who gave...
i shall rephrase my question.
A small spherical ball is floating in liquid layer due to surface tension. Thus it depresses the liquid layer as if it is an elastic membrane. So shall we say that buoyant force doesn't act on it?
Suppose that there is a small spherical ball of mass 'm' floating on surface of a liquid due to surface tension. The contact angle between ball and liquid is theta. Is there any way to calculate exactly as what fraction of ball will be inside the fluid. Buoyancy should not be neglect.
Surface tension is a surface phenomenon. So when i am inside the liquid, surface tension has no role to play.
I am using P = Po + dgh (d: density of liquid) to find the pressure. So where is the flaw?
We know about capillary rise. And we say that meniscus is hemispherical in shape.
Now please see this picture.
http://www.flickr.com/photos/63184961@N00/3030969897/
There i am mentioning two points where the pressure is indicated as P1 and P2.
I am also mentioning two other points 1' and...
In fox mcdonald - 6th edition page 83...i read that the free surface profile is independent of any property of liquid. But i have doubt that any liquid tried to acquire a shape so as to minimize its energy.
So what went wrong?