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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

What is price discrimination?

What is Price Discrimination? Price discrimination is a selling strategy that charges customers different prices for the same product or service based on what the seller thinks they can get the customer to agree to. In pure price discrimination, the seller charges each customer the maximum price they will pay. In a more common form of price discrimination, the seller places customers in groups based on certain attributes and charges each group a different price. Types of Price Discrimination There are three types of price discrimination. They are - a) First-degree or perfect price discrimination, b) Second-degree and c) Third-degree. You May Like 👉    What is management? 👉    What is E-commerce? 👉    What is Radioactivity?  

ILLITERACY

ILLITERACY Illiteracy is a curse. It is the root cause of the ignorance that frustrates all development efforts of the government and the community. No development efforts can succeed unless illiteracy is eradicated. Eradication of illiteracy in a country like Bangladesh with so vast a population is undoubtedly a gigantic task. No individual, community, or organization, not even the government is capable of solving this huge problem single-handed. It is the social responsibility of all the literate people, men, and women, to make some concerted efforts to remove illiteracy from society. The Government of Bangladesh has already undertaken some important programs in this regard. To provide primary education for at least 70 percent of the children of six to ten years of age by the end of 1990, the Government has launched a program called the Universal Primary Education (UDE) Project. The objectives are to increase enrolment, especially of girls, reduce dropouts and retain them at school t

Environmental Pollution

Environmental Pollution Human activities directly or indirectly affect the environment adversely. A stone crusher adds a lot of suspended particulate matter and noise into the atmosphere. Automobiles emit from their tailpipes oxides of nitrogen, sulfur dioxide, carbon dioxide, carbon monoxide, and a complex mixture of unburnt hydrocarbons and black soot which pollute the atmosphere. Domestic sewage and runoff from agricultural fields, laden with pesticides and fertilizers, pollute water bodies. Effluents from tanneries contain many harmful chemicals and emit foul smells. These are only a few examples that show how human activities pollute the environment. Pollution may be defined as the addition of undesirable material into the environment as a result of human activities. The agents which cause environmental pollution are called pollutants. A pollutant may be defined as a physical, chemical, or biological substance unintentionally released into the environment which is directly or indi

Valency of Oxygen

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What is the Valency of Oxygen? The valency of oxygen is 2. This means oxygen needs to gain or share two electrons for stability. To complete an octet requires 2 more electrons, hence the combining capacity or valency of oxygen is 2. Electronic configuration  of Oxygen The capacity of bonding of an atom with another atom of an element while forming a molecule is called valency. The valency of an element is determined by the number of atoms of H or Cl can be bond with one of its atoms. Electronic configuration of Oxygen For non-metal elements, the number of outermost odd electrons of an element is called valency. From the electronic configuration of Oxygen, we can see there is two odd electrons of its outermost energy level. So, the valency of oxygen is 2. You May Like 👉    What is green chemistry? 👉    What is salt bridge? 👉    Why chemistry is called the key science? 👉    Since when chemistry is being practiced? 👉    What is Al-Chemi?  

What is sham bedding?

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What is sham bedding? A sham in bedding is used as a protective and decorative cover for a pillow, which keeps unsightly stains, dust, and debris out of sight. Additionally, shams are decorative on the front and back, usually with a pattern or design that matches a duvet for a bedroom set. Pillow can be covered with a sham and arranged at the head of a bed so that a bedroom has a delightful and aesthetically pleasing presentation. When it is time to retire for bed, the shams can be removed from the pillows. Sham Bedding A sham is a decorative pillowcase that transforms normal-sized pillow fills into useful accessories for one's bedding set. You May Like 👉    What is green chemistry? 👉    What is salt bridge? 👉    Why chemistry is called the key science? 👉    Since when chemistry is being practiced? 👉    What is Al-Chemi?  

What is management?

What is management? Management is regarded as the most important of all human activities. It may be called the practice of consciously and continually shaping organizations. Each and every organization has people who are entrusted with the responsibility of helping the organization achieve its goals. Those people are called managers. No organization can carry on its business without management, which is in turn supervised by managers. Managing is essential to ensure the coordination of individual efforts within an organization. It is exciting because it deals with setting, seeking, and reaching the objectives of an organization. Each and every one of us is a manager and the practice of management is found in every facet of human endeavor- educational institutions, business, government or non-government organizations, associations, mosques, and families. Whatever may be the type of endeavor and/or organization, the managerial hurdles to overcome for setting and achieving objectives ar

Assignment SSC 2021 English Version

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Assignment SSC 2021 English Version Physics Assignment SSC 2021 Physics Assignment no. 1: Download link Physics Assignment no. 2:  Download link Physics Assignment no. 3: Download link Physics Assignment no. 4: Download link Physics Assignment no. 5: Download link Physics Assignment no. 6: Download link Physics Assignment no. 7: Download link Physics Assignment no. 8: Download link Chemistry Assignment SSC 2021 Chemistry Assignment no. 1: Download link Chemistry Assignment no. 2: Chemistry Assignment no. 3: Download link Chemistry Assignment no. 4: Download link Chemistry Assignment no. 5: Download link Chemistry Assignment no. 6: Download link Chemistry Assignment no. 7: Download link Chemistry Assignment no. 8: Download link Biology Assignment SSC 2021 Biology Assignment no. 1:  Biology Assignment no. 2: Biology Assignment no. 3: Download link Biology Assignment no. 4: Download link Biology Assignment no. 5: Download link Biology Assignment no. 6: Download link Biology Assignme

Human Bodies and Machines

Human Bodies and Machines In our daily life, we use many different types of devices. To travel we use cars, to preserve the food we keep them in the refrigerator, for comfort on hot days we turn on the electric fan, to learn news we watch the television, etc. This list is very long and for that reason, we can understand what a machine or device means. We know that the human body cannot be called a machine. A complete human being is created from just a single cell. There is no machine in this world that starts from a small unit and then transforms into a complete machine on its own. If any malfunction arises within the body, an automatic repair mechanism gets initiated, but no machine can do such a thing. But, still, to compare with the known world or to describe the functions of the different organs of the body, we often compare the human body with machines. For example, it can be said that our heart is an automatic pump that circulates blood spontaneously without any external stim

Contributions of Jagadish Chandra Bose

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Contributions of Jagadish Chandra Bose Acharya Sir Jagadish Chandra Bose was a renowned physicist, as well as a successful biologist. He was the first internationally recognized scientist of this subcontinent. The forefathers of Jagadishchandra Bose lived at the village of Rarikhal of Bikrampur in Dhaka district. He was born in 1858 in Mymensingh. His father, Bhagaban Chandra Bose, was a deputy magistrate of the Faridpur district. Acharya Sir Jagadish Chandra Bose His education started in a rural school in Faridpur. Later he completed his studies at Hare School and Saint Xavier School and College in Kolkata. After passing his B.A. in 1880, he went to England, and from 1880 - 1884 he completed his honors with BA in Physics from Cambridge University and then acquired a B.Sc. degree from London University. Returning to his motherland in 1885, he became a professor of physics in Presidency College. At that time was not enough scopes for research in that colleges, but he continued his res

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