Power is a measure of how quickly energy is transferred and it's measured in Watts. The more energy that is transferred in a certain time, the greater the power. A 100 W light bulb transfers more electrical energy each second than a 60 W...

Renewable energy resources are being developed because we are running out of fossil fuels at an exponential rate. The wind is produced as a result of giant convection currents in the Earth's atmosphere, which are driven by heat energy...

There are 10 types of energy. Magnetic, the energy in magnets, electromagnets and the Earth's magnetic field. Kinetic, the energy in moving objects, like this bullet out of a gun. Heat, which is also called thermal energy. Light, the...

Geothermal energy uses hot water and steam from deep underground to drive turbines. Radioactive decay of substances like uranium heats up rocks, which may heat water that rises as steam. In some places there may be hot rocks but no...

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A moment is the turning effect of a force. It’s calculated by multiplying the force by the perpendicular distance between the force and the pivot. For example, by turning a spanner you are producing a moment. If you apply a force of 15N...

The idea of conservation of momentum can be used to work out what will happen when things collide. Conservation of momentum states that the total momentum of a closed system is constant. This means that the total momentum before a...

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