stemNRICH : Science, Technology, Engineering, Mathematics enriched  
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Welcome to the Advanced Scientific Mathematics section of stemNRICH . This contains a set of activities designed to develop the advanced applied mathematical skills needed to make the most of the study of the physical sciences or engineering at university. These problems
naturally follow on from the more elementary core scientific mathematics section of stemNRICH and are primarily intended for those who intend to study physics, engineering or applied mathematics at university.
Area of maths  Style  Question  Description 

Rates of change  Image

Maths Filler 2  Practise looking at rates of change as this vessel fills with water. 
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Immersion  Various solids are lowered into a beaker of water. How does the water level rise in each case?  
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Brimful  Rotate the curves to make some mathematical vessels.  
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Brimful 2  Which of these mathematical flasks will eventually fill up with water?  
Curves  Image

Curve Fitter  Use your skill to try to fit a cubic equation through these three points. 
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Curve Fitter 2  Can you make a cubic which has a certain distance between the turning points?  
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Implicitly  Can you find the shape of this implicity defined function?  
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Whose line graph is it anyway?  Which line graphs, processes and equations go together?  
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Can you sketch these difficult curves, which have uses in mathematical modelling?  
Calculus  Calculus is involved in many problems on stemNRICH. See the physNRICH and engNRICH pages for various particular examples.  
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Can you hit the target functions using a set of input function and a little calculus and algebra?  
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Integration Matcher  Which curves, integrals and differentials go together?  
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What functions can you make using the function machines RECIPROCAL and PRODUCT and the operator machines DIFF and INT?  
Differential equations  You will also find lots of differential equations problems in various sections on the physNRICH and engNRICH pages  
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Differential Equation Matcher  Match the descriptions of physical processes to these differential equations.  
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Explore the possible mathematical solutions to the nonlinear order of reaction equation from chemistry.  
Series and expansions  Image

Production Equation  Each week a company produces X units and sells p per cent of its stock. How should the company plan its warehouse space? 
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Stirling Work  See how enormously large quantities can cancel out to give a good approximation to the factorial function.  
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What Do Functions Do for Tiny x?  How do these familiar functions behave for very small values?  
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Get further into power series using the fascinating Bessel's equation.  
Powers, roots and logarithms  See also the Logarithms and pH problems on the chemNRICH pages  
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Power Match  Can you locate these values on this interactive logarithmic scale?  
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Debt Race  Who will be the first investor to pay off their debt?  
Probability and distributions  Image

pdf Matcher  What scientific stories can you match to these pdf curves? 
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Circle PDF  How can an arc of a circle be a pdf?  
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Scale Invariance  By exploring the concept of scale invariance, find the probability that a random piece of realworld data begins with a 1.  
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Into the Exponential Distribution  Get into the exponential distribution through an exploration of its pdf.  
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Into the Normal Distribution  Get into the normal distribution through an exploration of its pdf.  
Statistics  Image

Stats Statements  This question gives you 10 statistical statements. Develop your statistical intuition by asking yourself are they sometimes, always, nearly always, almost never or never true?' 
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Overbooking  Why do airlines overbook?  
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The Wrong Stats  Why MUST these statistical statements be at least a little bit wrong?  
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Aim High  How much wheat should this farmer plant to minimise his expected loss?  
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Time to Evolve 2  How would you model the time between your birth and that of your grandfather?  
Trigonometry  Image

Flight Path  Use simple trigonometry to calculate the distance along the flight path from London to Sydney. 
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Loch Ness  Draw graphs of the sine and modulus functions and explain the humps.  
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Spherical Triangles on Very Big Spheres  Find out about spherical triangles and decide if telecoms engineers need to know about such things.  
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Taking Trigonometry Seriesly  Look at the advanced way of viewing sin and cos through their power series.  
Complex numbers  Image

A nice introduction to complex numbers, including many exercises for the reader.  
More on the way  More on the way  
Vectors  Image

Spotting the Loophole  A visualisation problem in which you search for vectors which sum to zero from a jumble of arrows. Will your eyes be quicker than algebra? 
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Starting with two basic vector steps, which destinations can you reach on a vector walk?  
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Follow Ulaf, Vicky and Wilber on a vector walk to determine the locations nearest to the origin.  
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Air Routes  An application of vectors and scalar products in a very practical setting.  
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Explore the meaning of the scalar and vector products and see how the two are related  
Vectors and matrices  Image

What quadrilaterals can you transform this pair of squares into?  
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Explore the mathematics of matrix transformations with these 10 individual questions.  
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Explore the algebraic and geometric properties of matrices with these 5 individual questions.  
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Crystal Symmetry  Use vectors and matrices to explore the symmetry properties of Caesium Chloride.  
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Explore how matrices can fix vectors and vector directions.?  
Can you make matrices which will fix one lucky vector and crush another to zero?  
Numerical methods  Image

Root Hunter  In this short problem, try to find the location of the roots of some unusual functions by finding where they change sign. 
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Building Approximations for Sin(x)  Build up the concept of the Taylor series.  
Decision making and algorithms  Image

Testing Strategy  Investigate ways in which you could implement a scoring system for a multiple choice test. 
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