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The amount of effort saved when using machines is called mechanical advantage (MA). Simple machines use mechanical advantage as a key property to their functionality, helping humans perform tasks that would require more force than a person could produce. We will use the lever as an example of a simple machine to illustrate the concept of mechanical advantage.

An interactive lesson discussing congruent triangles.

Outcomes

In this course you will learn about:

1. Conditions for congruency.
2. Proving congruent triangles.

In this lesson you will learn that:

• Circuit diagrams are used to show how electrical components are connected in a circuit.
• Individual circuit components are represented using circuit symbols.
• Current is the flow of electrons around a circuit.
• Ammeters are used to measure the current flowing through components. 
• Components in a circuit resist current flow.
• Voltmeters are used to measure the potential difference across components.

By the end of this unit you will be able to:

• Understand when to use Venn diagrams.
• Draw Venn diagrams.
• Interpret Venn diagrams.

The Earth behaves like a giant bar magnet and as such there is a magnetic field present around it. The Earth’s magnetic field is thought to be caused by flowing liquid metals in the outer core of the planet which causes electric currents and a magnetic field.

Outcomes:

• Design a diet and exercise regimen.
• Estimate the number of calories required for basic survival.
• Estimate the number of calories burned by exercise.
• Explain how heart health depends on diet and exercise.
• Explain how Body Mass Index (BMI) depends on weight and height.

This YouTube video delves into the impact that tourism can have on a country's economy.

Outcomes

In this unit you will learn about:

• The concept of elasticity
• Understand the relationship between tension and extension

In this lesson you will learn about:

• The concept of elasticity
• Understand the relationship between tension and extension