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How do you write an interesting historical essay while satisfying the needs of exam boards?

There is no fixed method or style to writing a history essay. There are, however, certain elements which must be included to both engage a reader and satisfy the stipulations of an exam board - it is importa...
OT
Answered by Oli T. • History tutor
3288 Views

What is the minimum frequency of electromagnetic radiation needed for a photon to ionise an atom of sodium? ( An atom of sodium has an ionisation energy of 5.15 eV.)

First, let's define what the ionisation energy is. The ionisation energy is the minimum amount of energy required to remove an electron from the ground state of an atom. That means, if we give an electron in...
AM
Answered by Angus M. • Physics tutor
14164 Views

Find the eigenvalues and eigenvectors of the matrix M , where M{2,2} = (1/2 2/3 ; 1/2 1/3) Hence express M in the form PDP^-1 where D is a diagonal matrix.

To start off, It's worth noting the definition of eigenvalues: for a Matrix A (n x n), it's ith eigenvalue (λ i ) is defined as the scalar constant the ith eigenvector (v i ) is multiplied for the matrix mul...
LT
3427 Views

How should I prepare for MMI?

Presenting yourself confidently at interview is important, you must also remain true to yourself, providing honest answers that convey your dedication and passion for the subject. Confidence can be achieved ...
OG
1757 Views

Find dy/dx in terms of t for the curve given by the parametric equations x = tan(t) , y = sec(t) for -pi/2<t<pi/2.

We know that dy/dx = (dy/dt) * (dt/dx). Differentiating each of the equations with respect to t gives. dy/dt = sec(t) tan(t) and dx/dt = sec 2 (t). Since dt/dx = 1 / (dx/dt) we have that dt/dx = 1/(sec 2 (t)...
OC
Answered by Oliver C. • Maths tutor
6803 Views