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What is the acceleration due to gravity at the space station.

By the end of this section, you will be able to:

• Add or subtract fractions with a common denominator
• Add or subtract fractions with different denominators
• Use the order of operations to simplify complex fractions
• Evaluate variable expressions with fractions

Part 1: Adding and subtracting fractions
Part 2: Examples of adding and subtracting fractions
Part 3: Common mistakes made when adding and subtracting fractions

Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity.

Outcomes

In this course you will learn about:

1. Expanding brackets.
2. Factorising by grouping.
3. Factorising by finding the difference of two squares.
4. Factorising trinomials.
5. Simplifying algebraic fractions

This video explains the angles of elevation and depression.

Applying Newton's first law to answer some true/false statements about why objects move (or not).

Outcomes

In this course you will learn about:

1. Archimedes discovery.
2. Why some objects float and others sink.
3. Buoyant force.
4. Archimedes principle.

Solving a word problem to find average velocity and speed of an object in one-dimension.

Patterns and processes of evolution. How evolution and natural selection are reflected in the similarities and differences of organisms.