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Вопрос № 256504 - Английский язык

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It may be assumed that a body consists of small particles or molecules, between which forces are acting. These molecular forces resist the change in the form of the body which external forces tend to produce. If such external forces are applied to the body, its particles are displaced and the mutual displacements continue until equilibrium is established between the external and internal forces. It is said in such a case that the body is in a state of deformation or strain. During deformation the external forces acting upon the body do work, and this work is transformed completely or partially into the potential energy of strain. An example of such an accumulation of potential energy in a strained body is the case of a watch spring. If the forces which produced the deformation of the body are now gradually diminished, the body returns wholly or partly to its original shape and during this reversed deformation the potential energy of strain, accumulated in the body, may be recovered in the form of external work.
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Molecular forces resist the change in the form of the body which external forces tend _________________.
Варианты ответов
  • to produce
  • to flow
  • to reduce
  • to pronounce
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Вопрос задал(а): Анонимный пользователь, 10 Ноябрь 2020 в 00:38
На вопрос ответил(а): Анастасия Степанова, 10 Ноябрь 2020 в 00:38

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Вопрос № 256505

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The property of bodies of returning, after unloading, to their initial form is called elasticity. It is said that the body is perfectly elastic if it recovers its original shape completely after unloading; it is partially elastic if the deformation, produced by the external forces, does not disappear completely after unloading. In the case of a perfectly elastic body, the work done by the external forces during deformation will be completely transformed into the potential energy of strain. In the case of a partially elastic body, part of the work done by the external forces during deformation will be dissipated in the form of heat which will be developed in the body during non-elastic deformation. Experiments show that such structural materials as steel, wood, and stone may be considered as perfectly elastic within certain limits.
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The body is perfectly elastic if it recovers its original shape completely _____________.
before loading
before unloading
after loading
after unloading

Вопрос № 256501

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A body possesses energy when due to its position or condition it is capable of doing work and the work it can do is a measure of its energy.
Energy is of two forms: potential energy and kinetic energy. The potential energy of a body is the energy possessed by the body thanks to its position or configuration. For example, a lifted weight has potential energy due to the higher position into which it has been lifted since it can do work as it falls under the action of gravity. The potential energy of the weight in its highest position is the same as its kinetic energy after it has fallen to its lowest position.
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The potential energy of a body is the energy possessed by the body thanks to its __________________.
position or component
colour or configuration
position or form
position or configuration

Другие вопросы по предмету Английский язык

Вопрос № 256505

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The property of bodies of returning, after unloading, to their initial form is called elasticity. It is said that the body is perfectly elastic if it recovers its original shape completely after unloading; it is partially elastic if the deformation, produced by the external forces, does not disappear completely after unloading. In the case of a perfectly elastic body, the work done by the external forces during deformation will be completely transformed into the potential energy of strain. In the case of a partially elastic body, part of the work done by the external forces during deformation will be dissipated in the form of heat which will be developed in the body during non-elastic deformation. Experiments show that such structural materials as steel, wood, and stone may be considered as perfectly elastic within certain limits.
Закончите предложение
The body is perfectly elastic if it recovers its original shape completely _____________.
before loading
before unloading
after loading
after unloading

Вопрос № 256506

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Thermodynamics is that branch of physics which deals with the conversion of mechanical energy into thermal energy and the reverse process of transforming heat into work.
The production of heat by mechanical means may be illustrated by the phenomenon of friction. For example, fire may be started while rubbing together two sticks of wood. Heat is developed when compressing a gas. The transformation of heat into work may be illustrated by operation of a steam or gas engine by means of which heat may be transformed into mechanical energy.
So a heat engine is a machine for transforming heat into mechanical energy, the most important of the practical heat engines being the steam engine and the internal combustion engines.
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The production of heat by mechanical means may be illustrated _____________.
by the phenomenon of freedom
by the datum of friction
by the phenomenon of energy
by the phenomenon of friction

Вопрос № 256507

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To transform energy from any of its numerous forms into heat is a comparatively simple process. To transform heat into work is a different matter. Experience shows that any actual physical process, as the change of state of a system, is irreversible and is accompanied by frictional effect. A strictly reversible frictionless process being an ideal, it may be approached but never attained. In the case of the ideal reversible process, there is no change in the quantity of available energy; but an actual irreversible process is always accompanied by a decrease of the amount of energy available for transformation. All transformations of energy are subject to two far-reaching laws:
1. The general law of conservation of energy
2. The law of degradation of energy.
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Experience shows that any actual physical process is irreversible and is accompanied ___________________.
by frictional phenomenon
by inner effect
by mechanical effect
by frictional effect

Вопрос № 256508

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The first law of thermodynamics is merely the law of conservation applied to the transformation of heat into work. It may be stated as follows: when work is expended in producing heat the quantity of heat generated is equivalent to the work done; and conversely, when heat is employed to do work, a quantity of heat precisely equivalent to the work done disappears.
The second law of thermodynamics is essentially the law of degradation of energy. Whereas the first law gives a relation that must be satisfied in any transformation of energy, it is the second law that gives information regarding the possibility of transformation and the availability of a given form of energy for transformation into work. A general statement of the second law is: “No change in a system of bodies that takes place of itself can increase the available energy of the system”.
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One of the laws of thermodynamics is the law of conservation applied to the transformation of _________________.
heat into energy
work into heat
heat into cold
heat into work
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