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Explain what led to the plum pudding model of the atom being replaced by the nuclear model of the atom.

An early model which was based on a scientific idea on atomic structure was the plum pudding model. In this model, it was believed the atom was a sphere of positive charge with negatively charged electrons s...
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Answered by Zoe H. • Physics tutor
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Explain Ohm's Law

Ohm's Law
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Answered by Zeeshaan A. • Physics tutor
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What is electricity

A transfer of energy via a current
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Answered by Andrew G. • Physics tutor
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A motor does 4.8kJ of work in 2 minutes. What is its power output?

Power is the RATE of work done or energy transferred. By the Law of Conservation of Energy, energy cannot be created or destroyed, only converted from one form to another. Power is the rate at which energy i...
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Answered by Simran J. • Physics tutor
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Suppose a student wants calculate the density of the two different objects, a metal cube and a small statue. Describe the methods the student could use to measure the density of the two objects.

First we should quickly remind ourselves of the equation for density:density= mass/ volumeTo calculate the density we need a method of measuring the mass of each object and another method for measuring the v...
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Answered by Alexander A. • Physics tutor
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