The definition of the effective charge In this paper we will determine the effective charge of an electron. The effective charge is by definition the ratio (e/m). Background Information and… Click here to read more
Welcome to Physics Homework - Questions & Answers
This site was started back in 2008, and features, among others, a collection of physics homework exercises and tutorials for all levels of physics students (high school and college).
We hope our site will help you advance in your studies and make it easier to understand physics, hence the world that surrounds us!
All the contents of this site were written by Valentin Bogatu (Physics, PhD).
Please help us spread the word. This site is free (supported by advertising) and your help is necessary to keep us going. Thank you for your visit.
The Bridge In the figure is presented a Wien Bridge. When its two arms are at equilibrium ($R1*R3=R2*R4$) the voltage on the Wien bridge diagonal cancels. You apply to this… Click here to read more
The supernova expansion In a supernova explosion, initially the supernova expands freely. Then the supernova enters a new stage when in the existent gas around the star, shock waves push… Click here to read more
Velocity as function of time You are given the dependence of velocity as function of time from the figure. Please find the position as function of time from the given… Click here to read more