Monthly Archive: April 2016

Work done in a Capacitor

Capacitor is an electrical component that stores charge. As charges are stored, potential energy in the capacitor also increases. In this post, I would like to explain how to calculate the energy stored in...

IGCSE Definitions

This document contains the common definitions that may be asked in the Cambridge IGCSE examinations. IGCSE Definitions

Radioactive Decay is Random

Radioactive decay is both random over space and time, and radioactive decay is spontaneous. Random Random over space means that given a large number of radioactive nuclei, it would be impossible to predict which nuclei would...

Ultrasound Calculations

The table provides the data for the acoustic impedance and absorption coefficients for muscle and bone. A parallel beam of ultrasound of intensity  enters the muscle of thickness 3.0 cm as shown. The ultrasound...