What conditions or environmental factors are important design considerations for ships?

It is not well known how far back in time that ships were invented. Despite this, some archaeological remains were found dating back to 6300 B.C. Based on that period, research and development were carried out on this subject based on different economical conditions and factors like trading and colonizing. Thus, from this early period, Egyptians, Greeks, Roman and Vikings showed clear improvements in ship line designs, and propulsion systems, like oars and sails.

P18 -  (5 questions)

What properties make aluminium a good material for aircraft?

Aluminum seems to be king in aircraft construction, though in recent years some new alloys have been applied. These super alloys are still quite expensive for the aircraft homebuilder. With its good strength to weight and cost ratio, aluminum is still used very widely in the industry.

What is a typical Young's modulus of aluminium alloy?

Tensile Modulus - Young's Modulus or Modulus of Elasticity - is a measure of stiffness of an elastic material. It is used to describe the elastic properties of objects like wires, rods or columns when they are stretched or compressed.

What property protects aluminium from corrosion?

Aluminum corrodes almost immediately forming an oxide layer that will protect it from further corrosion. For example: Place an aircraft in a salty environment near the ocean and the unprotected aluminum corrodes to a white powder if not handled properly.

Name three properties that make aluminium a good material for soft drinks cans?

It's the commonest metal in Earth's crust, the third most plentiful chemical element on our planet (only oxygen and silicon exist in greater quantity), and the second most popular metal for making things (after iron/steel). We all see and use aluminum every day without even thinking about it. Disposable drinks cans are made from it and so is cooking foil. You can find this ghostly gray-white metal in some pretty amazing places, from jet engines in airplanes to the hulls of hi-tech warships. What makes aluminum such a brilliantly useful material? Let's take a closer look!
P20 - (2 questions)

How do shapes relate to engineering?
Shapes are used in most fields of engineering. Engineers use them to understand how to design and build everything.

What different shapes do engineers use to construct buildings?

Much earlier they used only a few basic shapes such as circle, rectangle and triangle. Nowadays they use all geometric shapes to construct buildings.