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what is an ion? and how are they made?

An ion is a charged particle. They are made when an atom of neutral charge accepts or donates an electron from another atom or ion in order to bond with one another.
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Answered by Shaun W. • Chemistry tutor
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In a fluorescent tube, how are the atoms in the tube excited?

As there is a potential difference in the fluorescent tube. Electrons will flow from negative to the positive . These electrons collide with the orbital electrons in the atoms of the fluorescent tube. As the...
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Answered by Shaun W. • Physics tutor
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Solve x^2-5*x+6=0

There are 2 methods we can use here. Method 1 - Factorisation If we can rewrite the equation so that it looks like (x+a)*(x+b)=0, where 'a' and 'b' are numbers, then we can easily find a solution. If one or ...
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Answered by Hannah D. • Maths tutor
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what are the energy changes when a car rolls from the top of a hill to the bottom? Name two forces that would slow the acceleration of the car?

At first as the car is on the top of the hill, it has GRAVITATIONAL POTENTIAL ENERGY As the car rolls down the hill, GRAVITATIONAL POTENTIAL ENERGY changes to KINETIC ENERGY. Friction and Air resistance
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Answered by Shaun W. • Physics tutor
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expand the brackets (x+5)(x+3) furthermore what are the two values of x

X 2 +3X+5X+15 Take the first X in the first bracket and multiply by every number or letter in the second bracket. Take the Second number in the first bracket and multiply by every number or letter in the sec...
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Answered by Shaun W. • Maths tutor
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