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From a Newtonian perspective, the equation for the speed of a satellite in circular orbit around the Earth at a radius r can be derived by equating centripetal acceleration to the acceleration due to g...

The temperature of a substance is a measure of the average kinetic energy (energy of movement) of the molecules within it. When molecules have less kinetic energy, they are moving slower on average and...

Spanish GCSE is set up with 4 sections. The listening exam, Reading exam, Oral exam and finally the Written exam.

You might find it helpful to list some key features you know might apply to the question before you read the texts. The question will tell you what kind of features it is looking for, for example 'pres...

The first type of evil is natural evil, which is suffering caused by events humans had nothing to do with, like earthquakes and famine. 

The second type is moral evil, which is suffering ...