Recent content by uzair_ha91

But the values for R and \omega L and \omega C are not given.

What if I took them as vectors? VR = 40 VC = -20i VL = 50i V=40+30i The magnitude of this is sqrt (402 + 302) = sqrt (1600 + 900) = sqrt(2500) = 50 volts Is this correct?

But the values of resistance and reactance aren't given for capacitor and inductor, so how should I calculate their voltages? Or I just can't add them anyway? So how to reach the answer?

Homework Statement [PLAIN]http://img255.imageshack.us/img255/3048/56893213.jpg Find the voltage of the applied source. Homework Equations I=V/R Kirchoff's Voltage LawThe Attempt at a Solution Applying KVL. V= 40 + 50 +20 =110 Is this question that simple? Or am I missing something?

So formation of that mist which manifests that the reaction is highly reactive means that reaction is exothermic?

Homework Statement SO3 is not absorbed in water directly to form sulfuric acid because A. Reaction doesn't go to completion B. Reaction is slow. C. Highly exothermic. D. Insoluble Homework Equations -------------- The Attempt at a Solution MY...

I've read somewhere that only red light is used in photography because of its low energy which does not affect the photographic plate. So my question is that when light shines on a surface, is momentum transferred to the metal surface?

MY knowledge (which still remains untested) is that an accelerating electric charge produces a changing electric field. This changing electric field then produces a changing magnetic field which again sets up a changing electric field. This continuous process is known as an electromagnetic wave...

In mass spectrometer, isotopes are isolated and their atomic masses are determined. This is done in a mass spectrometer, in which first the atoms are ionized, vaporized then accelerated (because of their positive charges by electrodes) and finally are deflected in a perpendicular magnetic...

If memory serves, this is according to Bernoulli's principle. When velocity of a fluid increases, pressure decreases. Air, being a fluid, flows faster on one side of the ball and slower on the other (due to the spin given to the ball) which creates a pressure difference on the two sides. A net...

So it's 4pi not 2pi? Actually the answer I'm getting is different from that which is given at the end of my physics book. And while solving the problem, doesn't it become \Deltax\Deltap=h/4pi?

Homework Statement An electron is placed in a box about the size of an atom that is about 1*10^-10m. What is the velocity of the electron? Homework Equations Heisenberg's equation xp=h/2pi xmv=h/2pi v=h/2pi*x*m where x=1*10^-10m m=9.1*10^-31kg h=planck's cosntant...

Can anyone explain the following (the capitalized text)? "The ions of the quenching gas reach the cathode before the principal gas ions. When they reach near the cathode, THEY CAPTURE ELECTRONS (secondary?) AND BECOME NEUTRAL MOLECULES. FOLLOWING NEUTRALIZATION, THE EXCESS ENERGY OF THE...

Is it possible to change our usernames? (Didn't think too much about mine when I created it)

Hi, Given below are some questions which I have attempted and all I want to know now is whether they are correct or wrong and what the correct approach should be. So please check all my answers and point out the mistakes. Thanks. 1. Why do ordinary silicon diodes not emit light? A. Because...