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What was the Rutherford gold foil experiment

The rutherford gold foil experiment was an experiment the was done to determine the structure of the atom. In it a beam of alpha particles was shot at an extremely thin piece of gold foil and a detector was ...
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Answered by Kyle C. • Physics tutor
11392 Views

What is convection?

Convection is a heat transfer process that occurs in fluids. During convection, hot, less dense fluids rise to the top of a system, while cooler, more dense fluids sink to the bottow of the system under grav...
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Answered by Anuradha D. • Physics tutor
5348 Views

Whats the difference between speed and velocity?

Although these two words can be used interchangably they are very very different. Its easier to explain if you break down their equatoins. Speed = distance / time Velocity = displacement / time The differenc...
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Answered by Michael G. • Physics tutor
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Two cars are crash tested. Car A has a crumple zone, B doesn't. Both cars have mass 1500kg and a driver of mass 80kg and crash at 20m/s. Cars A and B take 0.8 and 0.2 seconds to stop respectively. Using this information, are crumple zones a necessity? (6)

We need to show that car A is safer than car B and this is done by showing that the force is greater on car B than car A. Start by finding the force on car A, total mass 1580kg: Force is the change of moment...
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Answered by Jake F. • Physics tutor
13471 Views

A lamp has a rating of 18V 9W. How much energy is transferred to the bulb in 5 minutes? Calculate the current through it when connected to a 18V supply.

The first question comes from the realisation that the power rating, "9W" represents 9 joules being supplied every second and so can be written as 9 J/s and so in 5 minutes (or 300 seconds) the ene...
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Answered by Alexander N. • Physics tutor
5010 Views