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In this course you will learn about:
- Properties of similar triangles.
- Conditions for similarity.
- Proving triangles similar.
In this course you will learn about:
In this lesson you will learn about:
What are simple machines? Simple machines are tools that make work easier. They have few or no moving parts. These machines use energy to do work with one movement. They make our work easier by letting us use less mechanical effort to move an object.
By the end of this unit you will be able to:
By the end of this unit you will be able to:
By the end of this unit you will be able to:
There are a few different ways to solve quadratics: factorising, using the quadratic formula or by completing the square. In this video we look at solving by factorising.
Speed necessary for the space station to stay in orbit.
Electric charge comes in two varieties, which we call positive and negative. Like charges repel each other, and unlike charges attract each other. Thus, two positive charges repel each other, as do two negative charges. A positive charge and a negative charge attract each other.
How do we know there are two types of electric charge? When various materials are rubbed together in controlled ways, certain combinations of materials always result in a net charge of one type on one material and a net charge of the opposite type on the other material. By convention, we call one type of charge positive and the other type negative.