Recent content by weston_sagle

Well, the situation isn't ideal. We recently got a new teacher, after our old teacher canceled 2 weeks of classes. Now we are trying to catch up so we have an assignment on material we haven't covered. I also have no textbook for the class. I did google searches but could only find R=...

Homework Statement At what temperature does a carbon resistor have a resistance of 995 ohms, if it has a resistance of 1000 ohms at 20 degrees? What is its conductivity at the new temperature? Homework Equations The Attempt at a Solution I don't even know where to start.

Figured it out. 5.43 is in angstroms, which is 10^-8 cm. So density is atoms for cm^3 so 8/(5.43x10^-8)^3 = 4.99x10^22/cm^3 Simple as that.

Homework Statement A hydrogen atom in its ground state is illuminated with light having a wavelength of 96.7 nm. can the hydrogen atom's electron be excited to a higher energy state by absorbing one of these photons? If so, determine the state and wavelength of any photon that would be...

Homework Statement There are 8 atoms in a unit cell of Si. Silicon has an atomic weight of 28.09 and a lattice constant equal to 5.43 A. Determine the density of silicon/ Homework Equations ? The Attempt at a Solution ?