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What is a median in math?

What is a median in math? The median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average. Median is the middle number in a sorted list of numbers. To determine the median value in a sequence of numbers, the numbers must first be sorted, or arranged, in value order from lowest to highest or highest to lowest. If there is an odd amount of numbers, the median value is the number that is in the middle, with the same amount of numbers below and above. If there is an even amount of numbers in the list, the middle pair must be determined, added together, and divided by two to find the median value. The median is sometimes used as opposed to the mean when there are outliers in the sequence that might skew the average of the values.  You may like What is manifesting? What is electric Charge? What is Binary? What is physics? What is pH scale? What is quantum mechanics?

Heat and Temperature

Heat and Temperature

Heat is a kind of energy. We have seen that energy can do work. By applying force it is possible to displace a body in the direction of the force, for example, heat is produced by burning fuel oil in a train or a car and this produced energy creates motion in the train or car. So this new form of energy is called heat energy like electricity or kinetic energy.

It is interesting that if we could see on the molecular level i.e, looking at any substance if we see its molecules, we should call it "kinetic energy" instead of the "heat energy".

We may regard heat as the physical cause of the sensation of hotness, coldness, and temperature as the degree of hotness or coldness. We know that a liquid flows only from higher to a lower level until a common level is attained, irrespective we the quantity of liquid at two levels. We replace the quantity of heat liquid with the quantity of heat and its level of temperature. We have heat flow from a body at a higher temperature to one at a lower temperature irrespective of the quantities of heat in the two bodies. This heat flow continues until the two bodies attain a common temperature. Therefore, heat can be defined as energy in transit.

The temperature of a system can be defined as the property that determines whether or not the body is in thermal equilibrium with the neighboring systems. If a number of systems are in thermal equilibrium, this common property of the system can be represented by a single numerical value called the temperature. It means that if two systems are not in thermal equilibrium, they are at different temperatures.

Measurement of temperature of a body accurately is one of the important branches of heat in physics. It also becomes necessary to measure high temperatures and low temperatures. To make this measurement possible, it is necessary to construct a suitable scale of temperature. The scale chosen must be precise and consistent and the temperatures measured on this scale must be accurate. Assessing the temperature of a body by the mere sense of touch or comparing the degree of hotness of a body with respect to another body does not help in measuring the temperature quantitatively and accurately.

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