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A cable with a diameter of 6mm is used to lift crate. Calculate the mass of the crate required to create a stress of 350 MPa.

Let's begin with the definition of stress: Stress = F/A First, we need to recall that the force the weight of the crate will exert on the cable will be equal to: F= m*g We know the stress, g and A. Combining...
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Answered by Abdel D. • Physics tutor
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Explain why the price of average tickets has risen by £10 in the last month. Use a supply and demand diagram. (5 marks)

This is an example of a 5 marker in the second part of new spec edexcel paper 1 1 mark for defining supply and demand 1 mark for applying it to context (text provided in the exam) 3 marks for diagram (origin...
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Answered by Jeppe S. • Economics tutor
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What conditions are needed for hurricane formation ? (6 marks)

Define tropical storm: A large, low-pressure system characterised by high wind speeds and heavy rain. Prerequisite conditions : - Location: Between 8 o -20 o North and South of the equator so that Coriolis f...
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Answered by Nevena S. • Geography tutor
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y=4x/(x^2+5)

Find dy/dx Remember quotient rule dy/dx=(u'v-v'u)/v^2 u=4x u'=4 v=x^2+5 v'=2x dy/dx=(20-4x^2)/(x^2+5)^2 (simplified)
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Answered by Jeppe S. • Maths tutor
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What is the indefinite integral ∫5exp(3-4x)dx ?

∫ 5e 3-4x dx=5∫e 3 e -4x dx=5e 3 ∫e -4x d=5e 3 [(-1/4)e -4x ]=-(5/4)e 3 e -4x =-(5/4)e 3-4x
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Answered by Alexandros M. • Maths tutor
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