When a force acts at right angles to the direction of motion, no work is done on the object. This is because the force and the displacement vectors are perpendicular to each other, and the cosine of 90 degrees is zero. Therefore, according to the formula for work done: W = F · d cos …
Weight is a measure of the force of gravity acting on an object. It is a vector quantity, meaning it has both magnitude and direction. The weight of an object is proportional to its mass, and is given by the formula: Weight = (Mass) X (Gravitational Acceleration) where, gravitational acceleration is the acceleration due to …
Wave Motion refers to the transfer of energy through a medium by the propagation of disturbances or oscillations in the medium. Waves can be classified into two broad categories: mechanical waves and electromagnetic waves. Mechanical waves Mechanical waves require a medium in order to propagate, and include waves such as sound waves, water waves, and …
Heat is a form of energy that is transferred between two objects or systems due to a temperature difference. Heat can be measured in several units, including: Joules (J): Joules is the standard unit of energy in the International System of Units (SI). Heat can be measured in joules, which are equal to the work …
There are several important gases present in the atmosphere that play significant roles in our daily lives and the functioning of the Earth’s ecosystems. Here are a few of the most important gases around us: Oxygen Oxygen is a vital component of life and has diverse industrial applications. In biology, it is essential for respiration, …
What is Weightlessness? Weightlessness is a phenomenon that occurs when an object or a person is in free fall or in orbit around a celestial body. In this state, the object or person experiences a sensation of weightlessness, even though they still have mass and are subject to gravity. Weightlessness occurs because objects or persons …
Question: Describe the work of a farmer with 1 hectare of land. Solution: A farmer with 1 hectare of land will cultivate it with wheat, rice, or other crops depending on the soil type, weather conditions, and irrigation facilities. The farmer will be using seeds, pesticides, and fertilizers. The farmer may not use machines like …
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Introduction Agriculture is the backbone of our civilization as it provides food and raw materials for various industries. It is the science and practice of cultivating crops and raising livestock for human consumption or industrial use. Organic farming is a type of agriculture that emphasizes the use of natural inputs and processes to grow crops …
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Agriculture is an ancient practice that involves the cultivation of crops and raising animals for food, fuel, and other products. It is a basic requirement for all living beings to sustain life. The art of cultivation of crops is called agriculture, and it began with ancient men who cultivated food in small areas and used …
What are Agricultural Implements? Agricultural implements are tools or machines used in farming activities to increase agricultural productivity and efficiency. These implements are designed to make the process of farming easier, faster, and more accurate. Some examples of agricultural implements include plows, cultivators, harrows, seed drills, planters, sprayers, and harvesters. With the advent of technology, …
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