Monthly Archives: September 2010

Heat Transfer – A Nice Cup of Tea

Heat – or thermal energy –  is always transferred from hot to cold If a hot cup of tea is left for a while, the tea goes cold. There are FOUR ways in which this happens 1. The thermal energy from … Continue reading

Posted in Physics | 1 Comment

Resistance and Ohm’s Law

The resistance of an electrical component tells us how many volts I need to push a current of 1A through it. It is measured in OHMS If we want to measure the resistance of a component, we connect up the … Continue reading

Posted in Physics | Leave a comment

Electromotive force

….isn’t a force at all. It’s better described as ‘electrical pressure’ which we measure , like p.d, in VOLTS. It’s written on the battery for you. These are both 1.5V cells, connected in series. Notice we connect + to – … Continue reading

Posted in Physics | Leave a comment

Tutorial Problems for AS

This link takes you to the Edexcel Physics for AS website where you will find tutorial examples on all aspects of both AS modules. You need to satisfy yourselves that you can do all of the questions without difficulty.

Posted in AS and A2 Physics | Leave a comment

Projectiles

The problem of the ‘Monkey and the Hunter’ is a famous one in physics. Here’s the picture. Where should the hunter aim to be sure of hitting the monkey, at him, above him or below him? When the monkey sees … Continue reading

Posted in AS and A2 Physics | Leave a comment

Equations of Motion

WordPress won’t let me post a spreadsheet here. Instead, here’s the first line of it as an image – you’ll have to create it for yourselves after all. Go from t=0 to t=20s. Here’s what to do. Click on the … Continue reading

Posted in AS and A2 Physics, Physics | Leave a comment

The Gold Leaf Electroscope – Electrostatic Measurement

This is a device to measure or compare static charge. It consists of a metal cap with a rod, with a thin gold leaf attached to it, electrically isolated from an earthed case with a black wax plug. When a … Continue reading

Posted in Physics | Leave a comment