Answer:
A simple machine consisting of an axle to which a wheel is fastened so that torque applied to the wheel winds a rope or chain onto the axle, yielding a mechanical advantage equal to the ratio of the diameter of the wheel to that of the axle.
Both the effects (l<span>engthening of the transmitted signal's wavelength and decrease in its frequency) indicates that the object is moving away from the observer, and this phenomenon is called Doppler effect.
In fact, when the object is moving away from the observer, the relative distance between two consecutive crests of the wave emitted by the object increases to the observer eyes, since he's moving away. This means that the wavelength appears larger, and since the frequency is inversely proportional to the wavelength, the frequency appears smaller.</span>
There are always new questions to answer and new problems to solve in this area. The correct option is D.
<h3>Why is problem solving essential in business?</h3>
It is a necessary skill for supervisors and other senior positions. Individuals who have excellent problem-solving skills are a precious and considered reliable attribute in any team.
They are the ones who come up with new ideas, better ways of operating, make things easier to understand, or help customers save time and money.
Before attempting to solve a problem, ascertain whether it is truly a problem. In addition to you, but additionally to those who are affected.
In this line of work, there are always fresh questions to answer and problems to solve.
Thus, the correct option is D.
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Answer:
Melting tin and then cooling it into a mold
Explanation:
When you melt something, and when it cools it returns to its physical state, therefore the physical changes are reversible. For example, take chocolate. When chocolate melts its liquid, then when it's in a colder situation it becomes solid again and so on, the changes are reversible.
