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Heat is transferred by 3 processes, conducation, convection and radiation. Having a vacuum layer stops heat being transferred away from the coffee by conduction. Conduction works by air molecules bumping ...

First I would draw a graph showing a wave to support my explanation for what the wavelength means. The wavelength of a wave is the distance, in metres, from one point of the wave to the same point on the ...

Using F=Ma, rearrage for a, a= 500/20, the acceleration is 25m/s²

The two decayed particles will form identical spirals but in the opposite direction to one another, as they will have to be oppositely charged to preserve the overall charge. The spiral patterns will be i...

This depends on what "best" means, but generally this boils down to location.

As an example, consider geothermal energy. This is derived from heat sources inside the Earth. Some places, s...