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Outline the structure of the alpha and beta particle and give their overall charge and a material which it cannot pass through.

Alpha - it is composed of 2 protons and 2 neutrons. It has an identical structure to a helium nucleus (an atom with no orbiting electrons). It has an over charge of +2. It cannot pass though a sheet of paper...
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Answered by Liam M. • Physics tutor
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What are the differences between microwaves and radio waves? How does this effect what we use them for?

Microwaves and radio waves are both used for communication purposes. Microwaves have a higher frequency, and therefore a smaller wavelength. Because of this, microwaves can travel through the Earth's atmosph...
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Answered by Madeleine R. • Physics tutor
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A tennis ball is hit over a net with a speed of 45ms^-1 and has a mass of 30g. Calculate the kinetic energy of tennis ball.

K=0.5 mv^2 K=0.5 0.03*(45^2) K=30.4J
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Answered by Liam M. • Physics tutor
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How do I factorise and solve 2x^2+4x-6=0?

The 2 in front of the x^2 can cause confusion. In this case, the equation can be divided through by 2, to produce x^2+2x-3=0. From here it can be factorised by working out what adds to make '2' and times to ...
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Answered by Madeleine R. • Maths tutor
11579 Views

Define electric current

Electric current is a measure of the rate of flow of charges. What this means is how many charges are flowing in a circuit in a certain time period. Mathematically this is expressed as I=Q/t where I is for c...
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Answered by Liam M. • Physics tutor
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