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Sketch a curve of f(x)= sin(x)/x

Start by analysing the parts of the function, it's clearly a combination of two functions: f = g(x) / h(x) and drawing them both out.Examine behaviour for -inf. and +inf.Notice a problem in a situation when ...
MP
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Sodium hydroxide reacts with phosphoric(V) acid according to the equation: 3NaOH + H3PO4 -> Na3PO4 + 3H2O 25.00 cm3 of 0.10 mol dm-3 sodium hydroxide reacts with 0.05 mol dm-3 H3PO4. The volume of H3PO4, in cm3, required for neutralisation is?

This is a simple moles equation and the method with any moles equation is find the number of moles of something, use the chemical equation to work out the number of moles of the thing you need to find and th...
ME
Answered by Matthew E. • Chemistry tutor
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A square based pyramid with corners ABCD has side length 6 cm. The distance from the centre of the square (C) to the top vertex of the pyramid (V) is 4 cm. Work out the total surface area of the pyramid.

The first thing I would do with this question is to draw it out to help visualise the shape.From this drawing you can see that the shape has 4 triangle shaped faces (let's call this triangle T1) and 1 square...
ME
Answered by Matthew E. • Maths tutor
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Use your knowledge of Water Potential applied to the GIT to describe what can cause or prevent Constipation

Water Potential is the measure of the ability of water molecules to move freely in solution. A solution of pure water where there is no solute and all of the water molecules are free to move, the water poten...
TM
Answered by Teresa M. • Biology tutor
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An exoplanet of mass 1.36x10^26 kg is orbiting a star of mass 3.2x10^31 kg at a distance of 1 AU. What is the magnitude of the gravitational force between the two?

We use Newtons equation for gravitational force. F=GMm/r 2 .1 AU is the mean distance at which the Earth orbits the Sun, taken to be: 1.49x10 11 m.Substituting in the numbers we find the magnitude of the for...
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Answered by Rory C. • Physics tutor
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