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Here we have a typical moments question. The start of the diving board is the pivot (draw a picture)To answer this question we need to know that sum of the clockwise moments must equal the sum of the anti...
The gold leaf will diverge from the metal stem. This is because connecting the negative electrode to the zinc plate, causes an influx of electrons to flow into the electroscope. When the electrode is remo...
A point in a gravitational field has an associated gravitational potential. It is defined as the work done required to bring a unit mass from a point an infinite distance to that point in the field. At an...
Firstly the gold foil was flattened so that it was one atom thick. The researchers knew that alpha particles were positively charged, and so would be repelled by other positive charges. At the atomic scal...
Firstly, a free-body diagram of the problem should be drawn indicating the forces acting on the block (remember that the friction force is the product of the normal reaction on the block and the coefficie...
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