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Why does ionisation energy increase across Period 3?

Ionisation energy is the energy required to remove the valence electron of an element/atom. The reason this increases is because, as we go across the period, the atomic number of the element increases. Th...

SF
Answered by Shahana F. Chemistry tutor
3270 Views

Solve the second order ODE, giving a general solution: x'' + 2x' - 3x = 2e^-t

First find an auxiliary equation, for the complimentary function:m^2 + 2m - 3 = 0, (m+3)(m-1)=0m=1 or m=-3So the complimentary function is: x= Ae^t + Be^-3tFor the particular integral (PI), let x = Ue^-tt...

IF
2341 Views

What is the indefinite integral of ln(x) ?

We can use integration by parts to solve this question. If we look at the formula for Integration by parts: ∫u(dv/dx)dx = uv - ∫ v (du/dx) dx, we see that u must be multi...

DM
Answered by Dawud M. Maths tutor
4854 Views

Outline Bowlby's Evolutionary Theory of Attachment

Bowlby (1958) defines attachment as a species-specific system that has evolutionary advantages and contributes to reproductive fitness. This is initially a biological relationship which then becomes a cog...

KE
Answered by Katie E. Psychology tutor
3409 Views

What is legitimacy and how is it gained?

Legitimacy is rightful authority. This means the right to assert power over other people. Legitimacy according to political thinker Max Weber has 3 sources:Traditional - this means that people see it some...

SR
3969 Views

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