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4 Sep 2001: Design a test to rank various materials in order of their wear resistance. ... Tip: use a very strong material to slide against your test materials.

4 Sep 2001: Devise a test to compare the impact resistance of different polymers like polystyrene foam, PMMA (also known as Perspex) and polyethylene.

4 Sep 2001: Design a test to see how long polymers can be held above their maximum service temperature.

4 Sep 2001: Devise a test for comparing the tear resistance of different fabrics.

4 Sep 2001: 1,140. 616. Alloy Steel. 210. 7,800. 1,330. Collect samples of many different types of rubber bands and test the amount of elongation before failure.

4 Sep 2001: It is not economic to use standard processes such as turning - so another approach is needed.

5 Sep 2001: Devising simple material tests is an important aspect of appreciating which properties are important in a design, and the challenges in obtaining meaningful, relevant material data.

5 Sep 2001: important and could be assessed by a tensile test to measure elastic deformation before failure. ... supported beam of the test material (un-notched, or notched underneath on the tensile edge) – by.

7 Sep 2001: Simple Questions. Why is it economic to recycle aluminium cans but less so for steel ones? ... Why will new reserves of minerals/oil which are not now economic to mine become economic in the future?

7 Sep 2001: it is the same whatever the size of the test-piece. Many applications require stiff materials, e.g.