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Answer: Most of the atom's mass must be concentrated in a small area at the centre of the atom. This is known as the nucleus.
The photoelectric effect is the emission/removal of electrons, normally, from the surface of a metal. This is done as light is shone on the metal. This is a very useful proof that light can act as a parti...
The photoelectric effect is the emission of electrons from a metal surface when light is incident on it. When a photon (a light particle) hits the metal surface, it interacts with the metal's electrons. T...
(Many students have an intuitive understanding of the photoelectric effect and how it demonstrates quantisation, but it is important when preparing for an exam to be able to explain this clearly and preci...
When the skydiver jumps out, they are instantaneously at free fall (accelerate at 9.81 m/s). After this, a drag force from the displacement of air is felt. The drag force is proportional to the velocity s...
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