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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
14184 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
3450 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
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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
6824 Views

Wie schreibt man einen Kommentar?

Ein Kommentar ist eine Reaktion auf einen journaistichen Stück, oft in Zeitungen. Er is eine persönliche Stellungnahme des Autors. Aufbau:Überschrift - interessant für LeserThese /EinstiegZusammenfassung Arg...
NN
Answered by Nicol N. • German tutor
2646 Views