unit 22 ( electric circuits )

In my school, I learnt about the electrical circuits... we did some experiment in this unit. And it is very exciting... we must make a series circuit... and the parallel circuits... then we learnt about the symbols of the wires, battery, switch and the bulb...and we have to make the diagrams of the circuit. so... that's what i learnt about the electrical circuits...

Unit 19 ( Gravitational force and frictional force )

In my school, Binus international school serpong, I learnt in science about the gravitational force and frictional force... I learnt that the gravitational force and the frictional force are a force that a gravitational  force is a force that can act at a distance from an object. Gravitational force is the force of attraction between things and then earth. And the frictional force is a force that opposes motion. It is produced when two surfaces rub against each other. so.... that is the gravitational force and the frictional force...