KhanAcademyExercises

Practice identifying the characteristics of a longitudinal or transverse wave such as the wavelength, crest, and areas of compression. 

Practice comparing the magnitude and direction of the electric and gravitational forces between objects.

Find volumes of solids with a given base and a common shape for all cross sections. In this exercise, cross section shapes are either triangles or semicircles.

Let's practice word problems involving spherical mirrors using the mirror and the magnification formulas together.

Find absolute minimum/maximum points of continuous functions over closed intervals.

Practice what you have learned about identifying externalities and using graphs to identify both market equilibrium and socially optimal outcomes in this exercise.

Practice what you've learned about how to calculate the consumer price index and the rate of inflation, as well as the limitations of the CPI in this exercise.

Practice what you've learned about real GDP, nominal GDP, and the GDP deflator in this exercise.

Check your understanding of Moore's law, open access, citizen science, and volunteer computing in this set of free practice questions designed for AP Computer Science Principles students.

Use estimation to solve two-step word problems involving addition, subtraction, multiplication, and division.  

Practice using a displacement graph and wave speed to find the frequency and wavelength of a wave. 

Solve word problems that involve general triangles using trigonometry.

Practice what you've learned about differences in real interest rates affect the movement of financial capital between countries. In this exercise, you'll get practice synthesizing many of the models you have seen so far to better understand the chain of events that occurs when different countries have different relative real interest rates.

Test your knowledge on the economic causes and effects of settlement of the West.

Solve missing triangle measures using the law of sines.

Practice predicting the motion of an object using the center of mass of the system. 

Test your knowledge of cellular respiration!

Practice what you've learned about the limitations of GDP in this exercise.

Practice what you have learned about the things that shift the supply of a currency or the demand for a currency in the foreign exchange market.

Practice discovering and explaining patterns in multiplication tables.