The Term Strength

The essential reason for these different appearances is the internal strength described in Section 6.4, the cohesion of the materials, due to their differing atomic or molecule structure. 

a certain force F is required. In the second test, a wire with a cross-section of 2 mm2 is tom apart, which requires twice the force, thus 2 F. But is this wire therefore twice as strong as the wire with a cross-section of 1 mm This is certainly not the case, since twice the force is only required, because the cross-section is twice as large. It is clear to see that the force required and the strength are not the same. The force necessary for tearing the sample apart depends on the cross-section of the latter. 

Applied Adhesive Bonding A Practical Guide for Flawless Results. Gerd Habenicht Copyright 2009 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 978-3-527-32014-1 

According to an international agreement, force is measured in a determined unit, called the Newton , in remembrance of the English physicist Isaac Newton (1643-1727). The abbreviation is N . 

Referring to the same cross-section, both wires require the same force to be torn apart. From this, the term strength can be deduced. It represents the tensile strength at break required for the cross-section of a material of 1 mm2  

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Probably the most basic information about a material that we need to know is its strength. But what precisely do we mean by the term strength In practice, the answer that engineers give to this question is to define the strength of a material as the force experienced at the point where it fractures. This topic is one that is complex from a theoretical point of view, largely because fracture is a point of discontinuity, and hence cannot readily be interpreted in terms of events leading up to it. 

A quantitative determination of the strength of Lewis acids to establish similar scales (Ho) as discussed in the case of protic (Br0nsted-type) superacids would be most useful. However, to establish such a scale is extremely difficult. Whereas the Brpnsted acid-base interaction invariably involves a proton transfer reaction that allows meaningful comparison, in the Lewis acid-base interaction, involving for example Lewis acids with widely different electronic and steric donating substituents, there is no such common denominator.25,26 Hence despite various attempts, the term strength of Lewis acid has no well-defined meaning. 

Contrast the term strength applied to absorption and to bonds. A stronger absorption is a more intense absorption—i.e. one with a big peak, A strong bond on the other hand has a higher frequency absorption (other things being equal). 

Differentiate between the terms strength and concentration as they apply to acids and bases. When is HC1 strong Weak Concentrated Dilute Answer the same questions for ammonia. 

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