Top answers

If the complex number z = 5 + 4i, work out 1/z.

1/(5 + 4i) * (5 - 4i)/(5 - 4i) = (5 - 4i)/41
OG
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What is the definition of a moment?

A moment is the product of force and the perpendicular distance from the pivot to the line of action of the force.
OG
Answered by Odin G. • Physics tutor
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What is the objection from the problem of evil to the existence of God?

The problem of evil attacks the principle that God is an omniscient, benevolent and omnipotent being. If God were omniscient, he would know that evil exists and he would know how to prevent it. A frequent ob...
CG
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Write cosx - 3sinx in the form Rcos(x + a)

Rcos(x + a) = Rcosxcosa - Rsinxsina By comparing cosx - 3sinx to the new expression, we can see that: Rsina = 3 and Rcosa = 1 If we square both and add them, we can see R = √(1 2 +(-3) 2 ) [I would explain w...
OG
Answered by Odin G. • Maths tutor
10649 Views

What is Ionisation Energy and the three factors that affect it? 2)State and explain the general trend in first ionisation energies for the Period 3 elements.

Ionisation energy is the energy required to remove 1 mole of electrons from each atom in 1 mole of gaseous atoms to form 1 mole of gaseous ions .For example,O (g) → O + (g) + e - The three factors that affec...
KR
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