i have a question that I cannot solve;
Show that the rms velocity of a sodium atom moving in a vaccum chamber at 300 kelvin is about 570 metres per second
pV=nRT and 3pV=Nm<c^2>
Define I(n) by I(n) = integral of x^n / square root(1+x^2) dx. Evaluate I(0), I(1) and then establish the reduction formula I(n) = ((root2)-(n-1)I(n-2))/(n) for suitable values of n, which should be stated
Here is my attempt
I found I(0) first,and got the answer to be...
1. integrate 1/(1+(xx-1)^0.5)
I.E. Integrate 1 over the sqaure root of( x^2 - 1)
2. I started by rationalizing the fraction and then i split the equation into two. I THEN let x = root2 (tanh(u)) for the 1/(xx-2) fraction, and have no idea what to do from there :S
1. The base of a cloud has an area of 2*10^7 metres squared and is on average 1km above the ground. treating the base of the cloud, the ground and the intervening air gap as a parallel plate capacitor, calculate the capacitance.[relative permittivity of air = 1.0]
2. I tried to say C...
I have a few questions:
1. 'small smoke particles in air are seen under a low magnification microscope to move randomly at a speed of 0.10mm/s. The speed of sound in air is 330m/s. Estimate the mass of the smoke particles.
I cannot make the link between speed of particle and speed of sound -...
I am stuck on a question about standing waves:
'The diagram below show's Melde's experiment and demonstartion of a stationary wave on a string'
The string has 3 full wavelengths shown, and 3 points are marked:
Point A is on an antinode, Point B is on the same antinode, but very...
Hello,
I have studied X-ray emission when an electron beam is fired at a tungsten target - But when I was presented with the graph of Intensity versus wavelength, I was confused...
I saw a curve, and on it there were spikes. What are these spikes, and why are they caused?
Something to...
Hi,
I have a question concerning a hydrogen spectrum:
There are 4 energy levels drawn:
Starting from the top
-1.4 * 10^-19 Joules
-2.4 * 10^-19 Joules
-5.4 * 10^-19 Joules
-21.8 * 10^19 Joules
1st question:
Going from the second level to the third from the top (from -2.4 to...
A cliff diver takes off horizontally from a cliff face 26.5 metres above the surface of the water. In the course of his flight, he travels 8 metres forwards, of which all but the last 1.5 metres of horizontal motion is above rock. In other words, he travels 6.5 metres in the air horizontally...
If ultraviolet radiation is shone onto a freshly-cleaned zinc cap of an uncharged leaf electroscope, explain why the emission of electrons will soon stop
I understand it is about the photoelectric effect, but I am not sure why the emission will ever stop...
Thank You in advance!:biggrin: