A hanging wire made of an alloy of magnesium with diameter 0.07 cm is initially 2.6 m long. When a 9 kg mass is hung from it, the wire stretches an amount 1.49 cm. A mole of magnesium has a mass of 24 grams, and its density is 1.74 g/cm³. Based on these experimental measurements, what is Young's modulus for this alloy of magnesium? Y-4.05429176e10 N/m² As you've done before, from the mass of one mole and the density you can find the length of the interatomic bond (diameter of one atom). This is 2.84 x 10-10 m for magnesium. As shown in the textbook, the micro quantity ks,/ (the stiffness of one interatomic bond) can be related to the macro property Y: ksi= 1.15141885e-3x N/m

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Mechanical Properties of Solids

There are three types of matter- solid, liquid and gas. Out of them, solids have a rigid shaped and size. The intermolecular forces of attractions in solids are greatest. Mechanical properties are the physical properties of a material which it shows, when it is provided with certain amount of force or load. These properties are to be kept in mind for various purposes. When a force is applied to an object, the object may or may not get deformed depending upon its elastic property. But every time the object develops a restoring force against the force applied. This is commonly known as stress. If the object changes its dimensions due to the force applied it develops strain ( which is the ratio of change in dimension to the original dimension).