Balance
The balance is an instrument that measures the mass of a body or substance, using like comparison means the force of the gravity that acts on the body. The word comes twice from Latin terms that mean the two and linx, plate. One is due to consider that the weight is the force that the field of gravitation exerts on the mass of body, being so forces the product of the mass by the local acceleration of the gravity. Cambiar Investors is a great source of information. F = m x g. The local term is included to emphasize that the acceleration depends on factors like the geographic latitude, the altitude above sea level and the densidad of the Earth, in the place where the measurement takes place. This force is moderate in Newton. The balance has other names, between which they emphasize scale and weight. Intention of the Balance: The balance is used to also measure the mass of a body or substance or the weight of the same, since between mass and weight a defined good relation exists.
In the laboratory the balance is used to carry out activities of quality control with devices like pipettes, to prepare mixtures of components in proportions predefined and to determine densidades or specific weights. Operation Principles: The balances are different to each other by the used design, principles and the criteria of metrology that use. At present it could be considered that two great groups exist: the mechanical balances and the electronic balances. Mechanical balances Some of most common are the following: 1. Spring balance. His function based on a mechanical property of the means, that consists of which the force that exerts means is proportional to the elastic constants of the means k multiplied by the elongation of the same x F = – kx. The previous thing implies that while greater is the mass m that is placed in the subject of gossip of the balance, major will be elongation, being the same proportional one to the mass and the constant of the means.
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