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Buoyancy. Chapter 1: Lesson 2. Aim. Why did the Titanic Sink?. Objectives. Students will be able to define buoyancy. Students will be able to explain why some objects sink while others float. Students will be able to explain what happened to the Titanic when it hit the iceberg. Buoyancy.

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buoyancy

Buoyancy

Chapter 1: Lesson 2

slide2
Aim

Why did the Titanic Sink?

objectives
Objectives
  • Students will be able to define buoyancy.
  • Students will be able to explain why some objects sink while others float.
  • Students will be able to explain what happened to the Titanic when it hit the iceberg.
buoyancy1
Buoyancy

Why do some objects float, while other objects sink?

A coin sinks because it weighs more than the water it displaces.

The aluminum ball floats because it contains air within its folds.

Air weighs less than water, so the ball weighs less than the water it displaces.

buoyancy2
Buoyancy
  • Archimedes was an ancient Greek scientist who discovered that floating objects are supported by an upward force called buoyancy. ( P.S.- he discovered this while taking a bath, and decided to run through the streets shouting out “Eureka, Eureka!”)
  • Buoyant force is equal to the weight of the liquid that the force displaces.
  • The theory concerning buoyancy is called Archimedes Principle.
why did the titanic sink
Why did the Titanic Sink?
  • After it hit the iceberg, water began to fill the air filled compartments on the ship.
  • The added weight of the water, combined with the weight of the ship became greater than the buoyant force supporting the ship.
  • We all know what happened after that!
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HW
  • Answer chapter review questions on pages 9-12 on page 24.
  • Read pages 7-10 (top of page).
  • Answer section review questions 1-3 on page 10.