The measurement of the rate and direction of change in position of an object is: ответ на тест 20918 - Английский язык

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Heat is a form of energy that transfers from one object or body to another if there is a difference in temperature between the two. When you are hot, for example, and the air outside your body is cooler, you lose heat to the air. A change in a body’s level of heat results in a change in the energy of its molecules. This gives rise to a temperature change, which may in turn lead to a change of state.

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Heat is a form of energy that transfers from one object or body to another if there is a difference in temperature between the two. When you are hot, for example, and the air outside your body is cooler, you lose heat to the air. A change in a body’s level of heat results in a change in the energy of its molecules. This gives rise to a temperature change, which may in turn lead to a change of state.

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Hostess: «Your bag is 3 kilos overweight. You have to pay excess luggage charge».
Passenger: «_______________».

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Light
1. The form of energy that illuminates our world is called light. It usually comes from hot objects, like the sun or fire, but it is also produced by electricity and some chemical reactions. Light is the only part of the electromagnetic spectrum (which includes microwaves, ultraviolet rays, and X-rays) that is invisible to the human eye. It travels at 186,000 miles (300,000 km) per second, and nothing can travel faster. Like other forms of energy, light travels in waves, but it can also travel in packets of energy called quanta. This enables it to travel through a vacuum.
2. Light rays are reflected when they hit a shiny or silvered surface, such as a still pool of water or a mirror. Reflection involves two light rays: the incoming ray and the reflected ray which bounces off the reflecting surface. The two rays are at identical angles to the reflecting surface on either side of an imaginary line.
3. Refraction is a property of all types of energy that travel in waves, including light. Light waves normally travel in straight lines, but when they pass from one transparent material to another, they usually refract, or bend. Refraction occurs because light travels at different speeds in different materials. As light from a material with a low density, such as air, enters a material with a high density, such as water, its speed is reduced. This causes it to bend (except when it enters a material at a right angle).
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Unlike all other kinds of electromagnetic radiation light …

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Vacuum
1. Evangelista Torricelli produced the first laboratory vacuum in 1643, and other experimental techniques were developed as a result of his theories of atmospheric pressure. A torricellian vacuum is created by filling a tall glass container closed at one end with mercury and then inverting the container into a bowl to contain the mercury.
2. The quality of a vacuum refers to how closely it approaches a perfect vacuum. Residual gas pressure is a primary indicator of quality, and is most commonly measured in units called torr, even in metric contexts. Lower pressures indicate higher quality, although other variables must also be taken into account.
3. Vacuum became a valuable industrial tool in the 20th century with the introduction of incandescent light bulbs and vacuum tubes, and a wide array of vacuum technology has since become available. The recent development of human spaceflight has raised interest in the impact of vacuum on human health, and on life forms in general.
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Sсhool psychology
1. School psychologists deal largely with psychological testing and student consultation in elementary and secondary schools. Psychological testing is the systematic use of tests to quantify psychological behaviour, abilities, and problems and to make predictions about psychological performance. Tests fall into three general categories.
2. An aptitude test is to measure one’s level of intelligence. An intelligence quotient (IQ) test is a good example of this type. By measuring an individual’s IQ, the test-giver hopes to predict the subject’s future ability to learn and reason. A second category is the achievement test, which assesses the subject’s present level of academic or intellectual accomplishment. Tests of personality form the third general category. A personality test is to reveal a person’s moods, attitudes, opinions, motivations, and style of thinking, speaking, and acting. Personality tests are used by mental health clinics and psychiatric to help diagnose mental disorders.
3. Counseling is the process of helping a student discover and develop his educational, vocational, and psychological potentialities and thereby to achieve an optimal level of personal happiness and social usefulness. The counselor`s goal is generally to orient the student toward opportunities that can best guarantee fulfillment of his personal needs and aspirations. The counselor usually attempts to clarify the student`s own thinking rather than to solve his problems.
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