rktpro

We all enjoy being at SFN. Most of you might have seen extraordinary people or really intelligent people here. Let us award them this year by recognizing their contribution to their respective fields and how well they have helped beginners excel. Let's have nominations for PHYSICS CHEMISTRY BIOLOGY MEDICAL SCIENCES Since I am no administrator or moderator this thread may be terminated.

As far as my knowledge go, a metal expands on heating. Heating just increases the volume of the metal not the mass. g is constant to particular area only. It varies at poles and equator too.

That doesn't mean a negative point buddy. I didn't know about your degree. What I was pointing out there was to use google translator as a tool for translator, of course only when you don't know that!

I am getting interested in relativity. I would read some when I get time!

I tried to prove that distance of image is same as the distance of object in a plane mirror. The image attached is the ray diagram. First of all, I have assumed object and image to be parallel to mirror. First I proved angle TSA = angle TSa Then I have made similar triangle TSA and triangle TSa with AA similarity. ( where angle ATS = angle aTS ----each 90) Therefore, TS/TS = TA/Ta => TA=Ta ( TS/TS = 1 ) => AS=aS ( corresponding parts of similar triangle are equal in ratio) Using this, I have made triangle ABS and abs congruent. where, As=aS angle ASB = angle aSB angle ABS = angle aBS => AB=aB ( corresponding parts of congruent triangles are equal) Therefor, size of image is same as that of object. Also, Bs=bS (corresponding parts of congruent triangles) That is, distance of image from mirror is same as that of object from mirror. Now, I want to know how to prove that angle of image is same as that of object with principal axis? Because in my above method I already assumed both to be 90 degree. In other words, how to prove that image is erect too?

You must be the relativity guy. Let's see what you people say about it.

You need to know about google translator.

What a loss. He was such a genius, a great man!

Now Panic you.

How, sir?

Book of such good author and still mistakes. Thanks buddy.

Not beggars. From whom would they beg? Nobody because everyone is bankrupt.

Because the time taken for absorption and emission in less than 10^-3 seconds.

Kids don't prefer reading these days. What majority would love reading would be comics or novels and they can be full of violence some times.

I came across this while reading--If an object approaches/moves away from a mirror with velocity v then the image approaches/moves away from the mirror with velocity 2v. Isn't this wrong? The image should approach/move away from object with 2v rather than from mirror. Thanks.

Obtener un primer libro que probablemente se lee "Aprende Inglés en un mes". Luego, puedes comenzar la conferencia.

Appear? Or actually?

They might. What they can't is overtaking speed of light in vacuum( unless they have heard of neutrinos defying barrier or something.)

Hmm, I apparently missed a point there. Thanks for pointing Captain. I agree BMI is not for those who are still in growing age.

Dr. Rocket. Is there any relation between gravitational field and electromagnetic field? Like, If I throw a magnet through a circular loop what would be the acceleration of magnet? Equal to g or less than it?

Electromagnet field or electric field?

Can you show how it's done? I am a beginner at this

And now you won't quit. Won't you?

One fact must be remembered that lenders survive when borrowers dwell. Economic development needs the growth of lenders, no doubt, but it leads to increase in number of borrowers. Lenders can increase when they have borrowers. Besides, economic crisis is really broad and not limited to lenders or borrowers.