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Qui or Que?

It can be tricky to understand when to use each of these relative pronouns. But if we break it down it is actually quite simple! Qui is used as the subject of the clause, (ie. the person/thing doing the verb...
RT
Answered by Rebecca T. • French tutor
4041 Views

How does the reactivity of group 2 elements change down the group, and what is the cause of this trend?

Each row on the periodic table represents a new energy level/electron shell. So as you go down the group there are more energy levels, increasing the atomic radius. The first electron to react will be on the...
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Answered by Ruth R. • Chemistry tutor
54649 Views

A capacitor discharge circuit of time constant 45ms includes a capacitor and resistor. The capacitor has a capacitance of 18µF What is the resistance of the resistor?

This question is in one of the CIE Physics Pre-U sample papers, and if you know the definition of the time constant for a capacitor circuit (=RC), its very easy, however even if you didnt it canbe derived fa...
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Answered by Sam C. • Physics tutor
6228 Views

‘Systems of prediction, preparation and prevention are so well developed, catastrophe is avoidable.’ In the context of volcanic hazards, discuss the extent to which you agree with this view. (40 marks)

As this is a 40-mark question, I will not attempt to provide a full-length sample answer, but instead offer guidance on how to structure this type of question. More detailed case studies and content advice w...
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Answered by Olivia M. • Geography tutor
14947 Views

Find dy/dx when y = x^2(cos(x)).

y = x 2 (cos(x)) therefore we will need to use the product rule, dy/dx = u dv/dx + v du/dx where u = x 2 and v = cos(x) du/dx = 2x and dv/dx = - sin(x), (don't forget the negative symbol when differentiating...
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Answered by Joseff S. • Maths tutor
33254 Views