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Explain why a jet fighter pilot experiences "weightlessness" when at the top of a loop-the-loop manoeuvre.

The the pilot will experience two forces acting upon him in opposing directions: gravity and centripetal force. The centripetal force will act outwards from the jet's circular path i.e. towards space; gravit...
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Answered by Isaac F. • Physics tutor
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find dy/dx when y=x^3 + sin2x

so this question is asking you to differentiate x 3 + sin2xwe know that x n differentiates do nx n-1 , so using that x 3 will differentiate to 3x 2 we know that sinx differentiates to cosx and 2x differentia...
Answered by • Maths tutor
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Discuss lines 90-136 from Act 1 Scene 3 of ‘Hamlet’. Explore Shakespeare’s use of language and it’s dramatic effects.

In Act 1, Scene 3 of ‘Hamlet’, Polonius is warning Ophelia to distance herself from Hamlet, to avoid risking the family’s honourby losing her chastity. Shakespeare uses blank verse to ennoblehis Polonius and...
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Answered by Deepali F. • English tutor
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Explain why compounds of Fe^2+ are coloured in solution. (4 marks)

Fe 2+ has an electron configuration of 1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 . When the ligands of the solution bind to the metal ion the d-orbitals are split which creates an energy gap that allows for electron tra...
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Answered by Ben G. • Chemistry tutor
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In terms of the photoelectric effect, what is the work function of a material?

It is the work done (or energy) required to remove an electron from its surface. This information is used a lot in Einstein's Nobel prize winning Photoelectric effect experiment and theory.
Answered by • Physics tutor
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