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High School (11–12) · Experimental Skills
You will write four functions for the optics experiments and the meters. They follow the lesson. The idea. For a real image, f = (uv)/(u + v). For a slab, n = ( i)/( r). For a prism at the least deviation, n = ((A + δ…
StemPy LabHigh School (11–12) · Principles Related to Practical Chemistry
You will finish a calculation of the percentage purity of a sample of Mohr's salt from a permanganate titration. The sample of 1.960 g was made up to 100.0 mL. A portion of 10.0 mL was titrated with permanganate of co…
High School (9–10) · Statistics
You will write a function for the mean of a table with one unknown frequency. Then you will search for the value that gives a target mean, and check whether an answer exists. The idea. The mean is (Σ fx)/(N) with both…
High School (11–12) · Structural Organisation in Animals
You will count the eggs of a female cockroach, find the adults that you expect, and follow the length of a nymph through its moults. The idea. The eggs are the oothecae times the eggs in each. A nymph grows by a facto…
Fit a noisy sine Python Programming
High School (11–12), High School (9–10), Undergraduate, General · Trigonometry and Waves by Computer
You will fit a sine to 60 noisy readings of a swinging spring, with a first guess from the FFT. The idea. The FFT finds the main frequency to within one bar. curve_fit then refines the amplitude, the frequency and the…
The summary machine Statistics & Data Science
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode, Spread of Data, Probability and Chance
You will build a function that summarises any list of numbers: how many, the mean, the median, the range and a chance. Then it summarises the month, and the definition of a hot day is yours to choose. The idea. A summ…
High School (11–12) · Experimental Skills
You will write four functions for the metre bridge and the potentiometer. They follow the lesson. The idea. On a metre bridge, (R)/(S) = (l)/(100 - l). The percentage error in R from an error Δ l in the balance point…
High School (11–12) · Principles Related to Practical Chemistry
You will write three small functions that turn burette readings into a concentration. Readings are in millilitres. The idea. A titre is the final reading minus the initial reading. Two titres that agree within 0.10 mL…
High School (9–10) · Statistics
You will write functions that build the less than and the more than cumulative frequencies of a table, and one that reads a curve. The idea. The less than total at the upper limit of a class is the running total. The…
High School (11–12) · Structural Organisation in Animals
You will place the parts of the alimentary canal in their regions, add the times that food spends in the parts, and find the part where the food stays longest. The idea. The alimentary canal has a foregut, a midgut an…
A wave and its speed Python Programming
High School (11–12), High School (9–10), Undergraduate, General · Trigonometry and Waves by Computer
You will draw a wave of wavelength 3.0 m and frequency 4.0 Hz at two times, find its first crest each time, and work out its speed. The idea. The crest of y = A(kx - ω t) moves at the speed v = fλ. You find where the…
Graph the month Statistics & Data Science
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode, Spread of Data, Probability and Chance
The month of 30 days is in two lists: the temperatures and the rainy days. You will split the temperatures into rainy and dry days, and count how many days had each temperature. Then the program draws a line graph wit…
High School (11–12) · Experimental Skills
You will write four functions for the experiments on heat and sound. They follow the lesson. The idea. In the method of mixtures, the heat lost by the hot block equals the heat gained by the liquid and the calorimeter…
High School (11–12) · Principles Related to Practical Chemistry
You will finish a small program for the cation group scheme. A dictionary gives the group of each cation. A mixture is a list of cations. The idea. Each group reagent takes out the cations of one group. The cations th…
High School (9–10) · Statistics
You will write a function for the mode of grouped data. Then you will use the rule of thumb and measure how far it is from the formula. The idea. The mode of grouped data is l + (f_1 - f_0)/(2f_1 - f_0 - f_2) × h for…
High School (11–12) · Structural Organisation in Animals
You will time an impulse along a nerve fibre, choose the speed for a kind of fibre, and compare two fibres. The idea. Time is distance divided by speed. A large myelinated fibre conducts at about 100 m/s, and an unmye…
An identity checker Python Programming
High School (11–12), High School (9–10), Undergraduate, General · Trigonometry and Waves by Computer
You will write three small functions that check a claimed identity on many angles: one finds the worst miss between the two sides, one says whether the identity holds, and one finds an angle where it fails. The idea.…
Two dice: simulation against exact Statistics & Data Science
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Probability and Chance
You will find the exact probability of each sum of two dice by listing the 36 pairs, then roll two dice 3,600 times and compare. The program draws both side by side. The idea. The exact probability counts equally like…
High School (11–12) · Experimental Skills
You will write four functions for Searle's experiment. They follow the lesson. The idea. For a wire of diameter d and length L, Y = (4MgL)/(π d^2 Δ L). A line through the origin fitted to the extension against the loa…
High School (11–12) · Principles Related to Practical Chemistry
You will write three functions that name an anion from what is seen. The observations are stored in a dictionary with three keys. The key "dilute" holds the gas with dilute sulphuric acid ("CO2", "H2S", "SO2", "NO2",…
High School (9–10) · Statistics
You will write functions that build the cumulative frequencies of a table and find its median. The idea. The cumulative frequency is a running total. The median class is the first class whose total reaches (N)/(2), an…
High School (11–12) · Structural Organisation in Animals
You will find the blood pumped in a minute, count the beats in some minutes, and name a muscle from its features. The idea. Cardiac output is the heart rate times the stroke volume. One litre is 1000 mL. Your tasks. F…
An angle toolkit Python Programming
High School (11–12), High School (9–10), Undergraduate, General · Trigonometry and Waves by Computer
You will write three small functions for angles: one that converts degrees to radians without math.radians, one that finds the quadrant of an angle, and one that returns the point of the unit circle at an angle. The i…
The long run of a coin Statistics & Data Science
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Probability and Chance
You will toss a coin 500 times in a program, keep the share of heads after every toss, and draw how that share moves. Then you see how close the last share comes to 0.5. The idea. The share of heads jumps about in a s…
High School (11–12) · Experimental Skills
You will write four functions for the pendulum and the straight-line graph. They follow the least-squares formulas of the lesson. The idea. The line y = mx + c through the points has the slope m = (nΣ xy - Σ xΣ y)/(nΣ…