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What is the meaning of the term "Specific Heat Capacity"?

Specific Heat Capacity is the amount of energy required to increase the temperature of 1kg of a substance by 1 degree Kelvin/Celsius ."Specific" refers to the fact that this value is per kilogram, ...
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Answered by Daragh M. • Physics tutor
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calaculate the resistance if two 3 ohm resitsors are placed in series and another 3 ohm was attached in parallel

total resistance for resistors in series is the addition of the resistances therefore the two 3 ohm resisters in series totals 6 ohms resistors in parallel follow the equation : 1/R T = 1/R 1 + 1/R 2 therefo...
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Answered by Brandon A. • Physics tutor
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Light with a frequency of 200nm is shone on a sodium plate with a work function of 2.28eV and electrons start escaping the surface of the plate due to the photoelectric effect. What is the maximum kinetic energy of one of these electrons in eV?

The work function of a metal is the minimum amount of energy required for electrons to start escaping the surface. This means that if we calculate the energy of each photon from the light and subtract the wo...
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Answered by Robert S. • Physics tutor
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What is the difference between velocity and speed?

Both the speed and the velocity show us how fast something is moving (the rate at which it changes its position). However, velocity is a vector quantity, which means it also gives us information about the di...
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Answered by Bozhidara S. • Physics tutor
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Describe how you could find the density of a cube of metal? (4 marks) (Example from GCSE bitesize)

Think of key words in the questions to help solve it. For example in this question we need to consider density and the fact that the object is a cube. 2) Remember the equation of density which is : Density =...
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Answered by Branwen A. • Physics tutor
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