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What is thermometry?

Thermometry The branch of heat relating to the measurement of the temperature of a body is called thermometry. The thermometer is an instrument used to measure the temperature of a body. The essential requisites of a thermometer are given as under:  1) Construction, 2) Calibration, and 3) Sensitiveness. For the construction of a thermometer, the proper choice of a substance, whose physical property varies uniformly with rising in temperature, is essential. 1) Construction The physical property of a substance plays an important role in the construction of a thermometer. In a mercury thermometer, the principle of expansion of mercury with rising temperature is used. The platinum resistance thermometer is based on the principle of the change in resistance with a change in temperature. The gas thermometer is based on the principle of change in volume or pressure with a change in temperature. 2) Calibration  When a thermometer is constructed, it should be properly calibrated. The standa

Heat and Temperature

Heat and Temperature What is heat? What is 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

Kingdom Animalia

Kingdom Animalia Characteristics: They are eukaryotic and multicellular animals. Their cells do not have nonliving cell walls, plastids, or vacuoles in them. As there are no plastids cells, they are heterotrophs, and so they depend on other organisms for their food. After ingestion, they digest their food. They have advanced and complex tissue systems. Sexual reproduction is their usual way of reproduction. Haploid gametes are usually produced in the reproductive organs of mature and diploid males and females. Embryonic layers are developed at the time of their embryonic development. Examples: The entire invertebrate and vertebrate animals except for protozoan. Thomas Cavlier-Smith from Oxford University divided the kingdom Protista of the living world into two groups, protozoa and chromista, and renamed the kingdom Monera as the Kingdom of Bacteria in 2004. In this way, he grouped the living world into six kingdoms.  You may like What do you mean by hierarchy? Why blue green

What is revolution?

What is revolution? Revolution has been central to the formation of the modern world. The word itself refers to radical, transformative change and has many generic uses describing phenomena from the "industrial revolution" to the "sexual revolution". As a historical process, "revolution" refers to a movement, often violent, to overthrow an old regime and effect complete change in the fundamental institutions of society.  After the French Revolution of the 18th century which deposed the monarchy and attempted to refashion society from top to bottom, revolution became synonymous with the radical overcoming of the past. Modernity, many came to believe, could only be achieved through such violent and total transformation. The inspiration for many 20th century revolutions was the Russian Revolution of 1917 led by Vladimir Lenin and inspired by the ideas of Marxist Communism. Marx believed that revolution was necessary to move societies from one historical s

What is considered a fever?

What is considered a fever? You probably always heard that the average human body temperature is 98.6°F. But the reality is that a "normal" body temperature can fall within a wide range, from 97°F to 99°F. Thermometer The 98.6°F standard dates to the mid - the 1800s. German doctor Carl Wunderlich measured the armpit temperatures of about 25,000 people and came up with an average of 98.6°F. Despite the new research, doctors don't consider you to have a fever until your temperature is at or above 100.4°F. But you can be sick if it's lower than that. Measuring body temperature by a digital thermometer You may like Hydrotherapy - Physiological Effects of Water Kidney Infection Symptoms  What is autism? Physics of Diagnostic X-rays What are the function of blood?

Objectives of Physical Education

Objectives of Physical Education Generally, we do not the difference between an aim and an objective in most cases. We often use them interchangeably. But these two terms are not synonymous. There are differences between them. The aim is the final goal whereas an objective is a short and specific step towards the goal. For example, in the case of your climbing the stairs to reach the roof, the roof is the aim and every stem of the stairs is an objective. An aim exists in human imagination which can not be depicted in reality. But an objective is real. Man can achieve the objective and even it is possible to measure. Physical educationists have mentioned several interims measures to attain the aims. These measures are known as the objectives of physical education. According to Williams, the aim of physical education is the all-around development of personality through the development of physical, social, and other areas of an individual. Book Walters states that the aim of physical

What is physical education?

What is physical education? To say something about physical education or to define it first we need to know what education is. Physical education is an integral part of the total education process. Without physical education, education remains incomplete. A definition of education will make it easy for us to understand what physical education is. Different scholars have defined education in different ways, which are related to different situations. Education is not only intellectual development, it also includes physical, social, and emotional, and all-around development of other areas. Education is not limited to a specific point of time in individual life but it takes place throughout life. Education is not confined to the boundary of a school but it may be acquired from family, society, playground, and so on. A few relevant definitions of education - According to Plato - "Education helps in the body and soul of the pupil all the beauty and all the perfection he is capable of

What is PanSexual?

What is PanSexual? Pansexuality is a term that refers to people who are attracted to others no matter the other person's gender identity. That includes men, women, and anyone who falls outside of the gender binary.  Pansexuality is not just limited to sexual attraction but can also involve a romantic or emotional attraction. The "pan" is pansexual is Greek for "all". So, the term pansexual describes individuals whose romantic or sexual attraction to people is not limited by biological sex, gender identity, or sexual orientation. Read more What is rape? Verbal Abuse, Emotional Abuse and Mental Abuse What is autism?


We pass our day-to-day life through various odds and problems. Happiness and sorrows are everyday phenomena of human life. When a baby is born into a family, everybody becomes happy and excited. Parents keep planning so many things for the bright future of the newborn. One of the issues of their planning is the healthy and normal development of the child. The physical, psycho-social, and intellectual development of a child takes place in a certain way but there are some exceptions in this respect. Parents get worried when they see that their child is behaving differently from other normal children or not following normal rules of development or lagging behind its age group. Gradually there prevails despair and frustration in the family. At first, parents have to struggle with their own minds to accept the difference in their child. At the same time, parents have to face many odds due to the negative attitudes of society and family members towards the baby. Normal development of a

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