Find the rectangular (scalar) components of a force for two coordinates systems.

Application of differentitaion in geology. A projectile problem.

A demo of the matrix entry part and its options.

A few questions which show off the new matrix entry part.

Demonstrates how to display a plot generated in R.

match different variables to either: 'nominal','ordinal','interval','ratio'

Using Mohr's Circle to calculate principal stresses in plane stress 2D case.

Calculate the von Mises stress at the base of a post subject to axial compression, bending and torsion.

Determine the principal stresses for a 3D stress state (with null third invariant).

Calculate invariants and von Mises stress for a general 3D stress state.

Determine maximum pressure in a closed thin-walled cylindrical pressure vessel before yield.

Work backwards from hoop strain measurement to calculate prior gauge pressure in a drinks can.

Calculate direct and shear stress in an axially loaded bar in the XY plane.

Entering numbers and algebraic symbols  in Numbas. (German translation)

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This is a test only

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Find the missing whole number power in an equation.

Calculating with indices.

Eenvoudige berekening van korting en BTW

Rationalise the denominator with increasingly difficult examples involving compound denominators. 

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Multiplication and addition of complex numbers. Four parts.

Exercises for HELM Book 2.7.1

For the graphs in HELM Book 2 Figure 30, identify which are one-to-one, and which are many-to-one.

Identify whether or not an expression is a polynomial. From HELM Book 2.7.1.

Unmarked question, with advice.

Write down an example of a polynomial of given degree and given variable.

Write down a non-polynomial function.

Explain why a polynomial with a fractional index is not a polynomial.