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Explain the change in first ionisation energy across period 2

Ionisation energy increases overall because nuclear charge increases with no significant increase in shielding, so it becomes more difficult to remove the outer electron.Ionisation energy decreases going fro...
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Answered by Amelia I. • Chemistry tutor
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Explain how price and output are determined for a firm in a monopolistically competitive market, in both the short run and the long run

There is a v simple formula for answering these 'explain' questionsStart with definitions - what is monopolistic competition? -10% of marksThen to score full marks, you must include:2 well-reasoned chains of...
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Answered by Will H. • Economics tutor
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Solve x^2=3(x-1)^2

To start with, we want to put this into quadratic form, where we have ax^2+bx+c=0. We notice that there are terms on both sides of the equation. So we can expand the right hand side and then bring all the te...
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Answered by Joshua U. • Maths tutor
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An internet shopping company is planning to use drones to deliver packages.During a test the drone is hovering at a constant height above the ground.The mass of the drone is 5·50 kg. The mass of the package is 1·25 kg. See questions below

a) Determine the upward force produced by the droneWe can simplify the problem by drawing a free body diagram. This allows us to analyse the forces involved. We are told the drone is stationary, meaning the ...
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Answered by Joe R. • Physics tutor
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How do I work out the exact value of a number which is expressed as an indice, for example 81^-1/4

Firstly, recall the indice rules which are applicable to the question, for example in this question we can use the rules:(x^a)^b = x^abx^-1 = 1/xx^1/2 = square root xSecondly, apply these rules to break down...
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Answered by Cameron H. • Maths tutor
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