KhanAcademyExercises

Practice solving multi-step word problems. The numbers in these problems may be fractions, decimals, and percents.

Given two complex numbers in polar form, find their product or quotient.

Use the Pythagorean theorem to discover patterns in 30°-60°-90° and 45°-45°-90° triangles.

Analyze the behavior of graphs of functions using a graphing calculator and your knowledge about derivatives.

Let's practice some problems to better understand the basic features of Young's double-slit experiment.

Let's practice some problems to better understand the fringe pattern that forms when two different wavelengths of light are used together, as sources.

Let's practice some problems to better understand the factors on which the fringe width depends in Young's double-slit experiment.

Let's practice some problems to better understand how different light waves interfere when they cross paths with each other.

Let's practice some problems to better understand how the intensity of overlapping waves vary with the phase or path difference between the waves.

Morgan's experiments, linkage and recombination

All about the chromosome theory of inheritance

Differences between genes and chromosomes

Add and subtract lengths to solve word problems. All problems are in meters and centimeters. 

Test your understanding of life under slavery, the abolition movement, and the Compromise of 1850.

Check your understanding of number precision, overflow errors, and roundoff errors in computer programs, in this set of free practice questions designed for AP Computer Science Principles students.

cross product - find perpendicular vector, properties of vector product and area of parallelogram

Practice estimating the equation of a line of best fit through data points in a scatter plot. Then, use the equation to make a prediction.

Practice solving word problems by adding small numbers (numbers 10 or less).

Practice creating bar graphs (bar charts) from data sets.

Check your understanding of Brønsted-Lowry acids, bases, and conjugate acid-base pairs in this set of free practice questions designed for AP Chemistry students.