Homework Statement
I have a fcc structure, the net parametre is 4.46*10-10m, the potential energy/mol is -1.88kJ/mol. My task is to find the parametres ε and σ of the potential.
Homework Equations
Φ=-4ε[(σ/r)6+(σ/r)12]
The Attempt at a Solution
I can find the value of r using the net...
Thank you very much for your anwsers, I am almost sure I have to say that is only thanks to the small angle that I can measure the distance on the photo because of the small angle; I have made some experiments with the shadows of two books and a table lamp, only for small angles the distances...
You are right, the photo is taken from the top of a building, the shadow makes a small angle of 4 degrees with the lamp itself, I have checked that the lamp is almost parallel to to the edge of the photo., so the only I can think of is saying that since the angles are small, if I am measuring...
Homework Statement
Hi everybody; a teacher of mine has given me a photo of two street lampd and their shadows; he has said to me that it's height is 3 metters, and the distance between the lamps is metters, and with that information I should be able to tell the length of the shadow.
The image...