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Chemistry. Biology. Mathematical modelling. Visualising. Sine, cosine, tangent. Optimisation. Regular polygons and circles. Physics. Differentiation. Real world.There are 69 results
Broad Topics > Using, Applying and Reasoning about Mathematics > Mathematical modelling
Population Dynamics
Age 16 to 18 Challenge Level:
This problem opens a major sequence of activities on the mathematics of population dynamics for advanced students.
Ramping it Up
Age 16 to 18 Challenge Level:
Look at the calculus behind the simple act of a car going over a step.
Chemnrich
Age 14 to 18 Challenge Level:
chemNRICH is the area of the stemNRICH site devoted to the mathematics underlying the study of chemistry, designed to help develop the mathematics required to get the most from your study. . . .
Branching Processes and Extinction
Age 16 to 18 Challenge Level:
An advanced mathematical exploration supporting our series of articles on population dynamics for advanced students.
Population Dynamics - Part 2
Age 16 to 18 Challenge Level:
Second in our series of problems on population dynamics for advanced students.
Population Dynamics - Part 3
Age 16 to 18 Challenge Level:
Third in our series of problems on population dynamics for advanced students.
Population Dynamics - Part 4
Age 16 to 18 Challenge Level:
Fourth in our series of problems on population dynamics for advanced students.
Predator - Prey Systems
Age 16 to 18 Challenge Level:
See how differential equations might be used to make a realistic model of a system containing predators and their prey.
Population Dynamics - Part 5
Age 16 to 18 Challenge Level:
Fifth in our series of problems on population dynamics for advanced students.
Population Dynamics - Part 6
Age 16 to 18 Challenge Level:
Sixth in our series of problems on population dynamics for advanced students.
Population Ecology Using Probability
Age 16 to 18 Challenge Level:
An advanced mathematical exploration supporting our series of articles on population dynamics for advanced students.
Population Dynamics Collection
Age 16 to 18 Challenge Level:
This is our collection of tasks on the mathematical theme of 'Population Dynamics' for advanced students and those interested in mathematical modelling.
Maximum Flow
Age 16 to 18 Challenge Level:
Given the graph of a supply network and the maximum capacity for flow in each section find the maximum flow across the network.
Bionrich
Age 14 to 18 Challenge Level:
bioNRICH is the area of the stemNRICH site devoted to the mathematics underlying the study of the biological sciences, designed to help develop the mathematics required to get the most from your. . . .
Physnrich
Age 14 to 18 Challenge Level:
PhysNRICH is the area of the StemNRICH site devoted to the mathematics underlying the study of physics
Bird-brained
Age 16 to 18 Challenge Level:
How many eggs should a bird lay to maximise the number of chicks that will hatch? An introduction to optimisation.
Stemnrich - the Physical World
Age 11 to 16 Challenge Level:
PhysNRICH is the area of the StemNRICH site devoted to the mathematics underlying the study of physics
Ball Bearings
Age 16 to 18 Challenge Level:
If a is the radius of the axle, b the radius of each ball-bearing, and c the radius of the hub, why does the number of ball bearings n determine the ratio c/a? Find a formula for c/a in terms of n.
Designing Table Mats
Age 11 to 16 Challenge Level:
Formulate and investigate a simple mathematical model for the design of a table mat.
Stonehenge
Age 16 to 18 Challenge Level:
Explain why, when moving heavy objects on rollers, the object moves twice as fast as the rollers. Try a similar experiment yourself.
The Not-so-simple Pendulum 1
Age 16 to 18 Challenge Level:
See how the motion of the simple pendulum is not-so-simple after all.
Big and Small Numbers in Physics - Group Task
Age 16 to 18 Challenge Level:
Work in groups to try to create the best approximations to these physical quantities.
Engnrich
Age 16 to 18 Challenge Level:
engNRICH is the area of the stemNRICH Advanced site devoted to the mathematics underlying the study of engineering
Guessing the Graph
Age 14 to 16 Challenge Level:
Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?
Population Dynamics - Part 1
Age 16 to 18 Challenge Level:
First in our series of problems on population dynamics for advanced students.
Rocking Chairs, Railway Games and Rayboxes
Age 5 to 18
In this article for teachers, Alan Parr looks at ways that mathematics teaching and learning can start from the useful and interesting things can we do with the subject, including. . . .
Advanced Scientific Mathematics
Age 16 to 18 Challenge Level:
This is the section of stemNRICH devoted to the advanced applied mathematics underlying the study of the sciences at higher levels
Modelling Assumptions in Mechanics
Age 16 to 18
An article demonstrating mathematically how various physical modelling assumptions affect the solution to the seemingly simple problem of the projectile.
The Wrong Stats
Age 16 to 18 Challenge Level:
Why MUST these statistical statements probably be at least a little bit wrong?
Model Solutions
Age 16 to 18 Challenge Level:
How do these modelling assumption affect the solutions?
Stringing it Out
Age 14 to 16 Challenge Level:
Explore the transformations and comment on what you find.
The Legacy
Age 14 to 16 Challenge Level:
Your school has been left a million pounds in the will of an ex- pupil. What model of investment and spending would you use in order to ensure the best return on the money?
In Constantly Passing
Age 14 to 16 Challenge Level:
A car is travelling along a dual carriageway at constant speed. Every 3 minutes a bus passes going in the opposite direction, while every 6 minutes a bus passes the car travelling in the same. . . .
Spot the Card
Age 14 to 16 Challenge Level:
It is possible to identify a particular card out of a pack of 15 with the use of some mathematical reasoning. What is this reasoning and can it be applied to other numbers of cards?
Shaping the Universe III - to Infinity and Beyond
Age 11 to 16
The third installment in our series on the shape of astronomical systems, this article explores galaxies and the universe beyond our solar system.
Drawing Doodles and Naming Knots
Age 7 to 18
This article for students introduces the idea of naming knots using numbers. You'll need some paper and something to write with handy!
What's a Knot?
Age 7 to 16 Challenge Level:
A brief video explaining the idea of a mathematical knot.
Snooker
Age 16 to 18 Challenge Level:
A player has probability 0.4 of winning a single game. What is his probability of winning a 'best of 15 games' tournament?
Problem Solving, Using and Applying and Functional Mathematics
Age 5 to 18 Challenge Level:
Problem solving is at the heart of the NRICH site. All the problems give learners opportunities to learn, develop or use mathematical concepts and skills. Read here for more information.
Escalator
Age 14 to 16 Challenge Level:
At Holborn underground station there is a very long escalator. Two people are in a hurry and so climb the escalator as it is moving upwards, thus adding their speed to that of the moving steps. . . .
Concrete Calculation
Age 14 to 16 Challenge Level:
The builders have dug a hole in the ground to be filled with concrete for the foundations of our garage. How many cubic metres of ready-mix concrete should the builders order to fill this hole to. . . .
Over-booking
Age 16 to 18 Challenge Level:
The probability that a passenger books a flight and does not turn up is 0.05. For an aeroplane with 400 seats how many tickets can be sold so that only 1% of flights are over-booked?
Overarch 2
Age 16 to 18 Challenge Level:
Bricks are 20cm long and 10cm high. How high could an arch be built without mortar on a flat horizontal surface, to overhang by 1 metre? How big an overhang is it possible to make like this?
Where to Land
Age 14 to 16 Challenge Level:
Chris is enjoying a swim but needs to get back for lunch. If she can swim at 3 m/s and run at 7m/sec, how far along the bank should she land in order to get back as quickly as possible?
Chocolate 2010
Age 14 to 16 Challenge Level:
First of all, pick the number of times a week that you would like to eat chocolate. Multiply this number by 2...
The Mean Game
Age 16 to 18
Edward Wallace based his A Level Statistics Project on The Mean Game. Each picks 2 numbers. The winner is the player who picks a number closest to the mean of all the numbers picked.
Dam Busters 1
Age 16 to 18 Challenge Level:
At what positions and speeds can the bomb be dropped to destroy the dam?
Shaping the Universe II - the Solar System
Age 11 to 16
The second in a series of articles on visualising and modelling shapes in the history of astronomy.
Shaping the Universe I - Planet Earth
Age 11 to 16
This article explores ths history of theories about the shape of our planet. It is the first in a series of articles looking at the significance of geometric shapes in the history of astronomy.
Pdf Stories
Age 16 to 18 Challenge Level:
Invent scenarios which would give rise to these probability density functions.
NRICH is part of the family of activities in the Millennium Mathematics Project.