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The voltage (or potential difference) between two points is the cost in energy to move a unit of positive charge from the point of lower potential to the point of higher potentia...
Firstly, energy transfers happen step by step. Almost all energy on Earth comes from the Sun. The Sun causes plants to photosynthesise so the energy becomes chemical energy in your food. When you eat your...
EM waves invariantly travel at the speed of light, and can do so in a vacuum. They transfer energy from their source to the absorber. Some kinds of EM waves can be reflected and refracted. The spectrum of...
At the centre of the atom, is the nucleus. This is made up of protons and neutrons. Protons are positively charged, with a relative charge of +1. Whilst neutrons are neutral (relative charge = 0).Surround...
Firstly, we want to define what information we know from the question: ∆Q = 18000C; ∆t = 300s, P = 13.8kWTherefore, to calculate the resistance we can use the power equation, P=I2R, and c...
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