Tag: A-level

Simple Harmonic Motion and Circular Motion

Simple harmonic motion is closely related to a uniform circular motion. A real life simple harmonic motion. Review Question 1 Answer the following questions as you watch the first YouTube video(Simple…

Mathematics of Circular Motion

Angular Displacement The angle which an object moves around a circle is called the angular displacement. This angle is usually expressed in radians. Hence, there are radians in one complete…

How a Capacitor Discharge

How does a capacitor work? When a capacitor is connected across a power source, it starts charging up as current flows in the circuit.   Initially when the capacitor has…

Capacitance

What is a capacitor?   A capacitor is an electrical component that stores charge. It is usually made by having two parallel plates thinly separated by an insulating material. This…

Gravitation and Circular Motion

Why does a orbiting satellite not fall to the Earth? A common misconception among students is that orbiting satellites do not experience gravity. It is argued that since these satellites…

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…

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…