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Far Horizon

An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?

Data Matching

Use your skill and judgement to match the sets of random data.

More or Less?

Are these estimates of physical quantities accurate?

What's That Graph?

Age 14 to 16 Challenge Level:


Here are some graphs of physical processes.





Can you suggest plausible processes that could have given rise to each graph?

Now click on the link below to see eight processes that give rise to the graphs.
Can you match each process to a graph?






Can you suggest equations that could model each of these processes?

Now click on the link below to see eight equations.
Can you match each equation to the graphs and related processes?






Can you determine values for the constants A, B and C for each equation? For some, you will need to make some assumptions.