Other tags that relate to Cobalt Decay
Exponential growth and decay. STEM - physical world. Biology. Physics. Simultaneous equations. Investigations. Engineering. Estimating and approximating. Maths Supporting SET. Chemistry.There are 59 results
Broad Topics > Applications > Biology
Approximately Certain
Age 14 to 18 Challenge Level:
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
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.
Bigger or Smaller?
Age 14 to 16 Challenge Level:
When you change the units, do the numbers get bigger or smaller?
Core Scientific Mathematics
Age 14 to 18 Challenge Level:
This is the area of the advanced stemNRICH site devoted to the core applied mathematics underlying the sciences.
Drug Stabiliser
Age 16 to 18 Challenge Level:
How does the half-life of a drug affect the build up of medication in the body over time?
Choose Your Units
Age 14 to 16 Challenge Level:
Which units would you choose best to fit these situations?
A Question of Scale
Age 14 to 16 Challenge Level:
Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?
Whose Line Graph Is it Anyway?
Age 16 to 18 Challenge Level:
Which line graph, equations and physical processes go together?
Genetic Intrigue
Age 16 to 18
Dip your toe into the fascinating topic of genetics. From Mendel's theories to some cutting edge experimental techniques, this article gives an insight into some of the processes underlying. . . .
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 1
Age 16 to 18 Challenge Level:
First 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.
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.
Population Dynamics - Part 2
Age 16 to 18 Challenge Level:
Second in our series of problems on population dynamics for advanced students.
Reaction Types
Age 16 to 18 Challenge Level:
Explore the rates of growth of the sorts of simple polynomials often used in mathematical modelling.
Investigating the Dilution Series
Age 14 to 16 Challenge Level:
Which dilutions can you make using only 10ml pipettes?
Extreme Dissociation
Age 16 to 18 Challenge Level:
In this question we push the pH formula to its theoretical limits.
Blood Buffers
Age 16 to 18 Challenge Level:
Investigate the mathematics behind blood buffers and derive the form of a titration curve.
Chi-squared Faker
Age 16 to 18 Challenge Level:
How would you massage the data in this Chi-squared test to both accept and reject the hypothesis?
Mixed up Mixture
Age 14 to 16 Challenge Level:
Can you fill in the mixed up numbers in this dilution calculation?
Fitting Flat Shapes
Age 16 to 18 Challenge Level:
How efficiently can various flat shapes be fitted together?
Packing 3D Shapes
Age 14 to 16 Challenge Level:
What 3D shapes occur in nature. How efficiently can you pack these shapes together?
Catalyse That!
Age 16 to 18 Challenge Level:
Can you work out how to produce the right amount of chemical in a temperature-dependent reaction?
Exact Dilutions
Age 14 to 16 Challenge Level:
Which exact dilution ratios can you make using only 2 dilutions?
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.
Alternative Record Book
Age 14 to 18 Challenge Level:
In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.
Dilution Series Calculator
Age 14 to 16 Challenge Level:
Which dilutions can you make using 10ml pipettes and 100ml measuring cylinders?
Stats Statements
Age 16 to 18 Challenge Level:
Are these statistical statements sometimes, always or never true? Or it is impossible to say?
Robot Camera
Age 14 to 16 Challenge Level:
Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?
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. . . .
Why Multiply When You're about to Divide?
Age 16 to 18 Challenge Level:
A brief introduction to PCR and restriction mapping, with relevant calculations...
Real-life Equations
Age 16 to 18 Challenge Level:
Here are several equations from real life. Can you work out which measurements are possible from each equation?
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.
Is Your DNA Unique?
Age 16 to 18 Challenge Level:
Use combinatoric probabilities to work out the probability that you are genetically unique!
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. . . .
The Genes of Gilgamesh
Age 14 to 16 Challenge Level:
Can you work out the parentage of the ancient hero Gilgamesh?
Ratios and Dilutions
Age 14 to 16 Challenge Level:
Scientists often require solutions which are diluted to a particular concentration. In this problem, you can explore the mathematics of simple dilutions
Graphic Biology
Age 16 to 18 Challenge Level:
Several graphs of the sort occurring commonly in biology are given. How many processes can you map to each graph?
Mathematical Issues for Biologists
Age 16 to 18 Challenge Level:
STEM students at university often encounter mathematical difficulties. This articles highlights the 8 key problems for biologists.
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.
NRICH is part of the family of activities in the Millennium Mathematics Project.