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The volume, V, of water in a tank at time t seconds is given by V = 1/3*t^6 - 2*t^4 + 3*t^2, for t=>0. (i) Find dV/dt

The differential of a function is is rate of range of that function. Therefore to find dV/dt, we are finding the rate of change of the volume per unit time.Recall, in order to differentiate a term, e.g. x a ...
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Answered by Samuel W. • Maths tutor
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Explain why Magnesium has a greater second ionisation energy than strontium

Magnesium is a smaller atom with a smaller radius than strontium, this means the electron has a greater attraction to the nucleus. Also as strontium has more orbitals the electron has more shielding from the...
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Answered by Kelvin W. • Chemistry tutor
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What is the mechanism of inspiration in human?

Inspiration and expiration are the terms used to describe breathing in and out. The way in which we breathe depends entirely upon a pressure gradient that determines the direction of air movement in or out o...
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Answered by Pam N. • Biology tutor
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I don't understand Pythagoras' theorem . What is it and how do you use it?

Ok, so the reason we need the Pythagoras theorem is to work out the length of missing side given we know the other 2 sides in a right-angled triangle. (Would go on to draw the triangle with the known sides a...
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Answered by Stefano M. • Maths tutor
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Explore the theme of dreams in 'Of Mice and Men'

(P - point) Dreams play a central role in 'Of Mice and Men' by introducing the idea of the American Dream and its reality in the time of the Great Depression. (E - example) Before even reaching the ranch Len...
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