1. Automatic wrist watches get energy from the various movements of our hand, as indicated by option [D]. Inside the watch, there's a component called a rotor, which rotates with the motion of the wearer's wrist. As the rotor moves, it winds the mainspring, which stores potential energy. This energy isRead more

    Automatic wrist watches get energy from the various movements of our hand, as indicated by option [D]. Inside the watch, there’s a component called a rotor, which rotates with the motion of the wearer’s wrist. As the rotor moves, it winds the mainspring, which stores potential energy. This energy is then gradually released to power the watch’s movement and functions. The winding of the mainspring is what eliminates the need for a battery in automatic watches. This ingenious mechanism harnesses the kinetic energy produced by the wearer’s everyday activities, such as walking or moving the wrist, and converts it into the mechanical energy needed to keep the watch running. This process demonstrates the principle of energy conversion, where one form of energy (kinetic energy from movement) is transformed into another form (potential energy stored in the mainspring), allowing the watch to function autonomously without external power sources. Therefore, the energy source for automatic wrist watches lies in the natural movements of the wearer’s hand, making them self-sustaining and environmentally friendly timepieces.

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  2. A geostationary satellite moves continuously in its orbit due to the gravity applied by the Earth on the satellite, corresponding to option [B]. Gravity keeps the satellite in orbit, and the centrifugal force generated by its motion balances this gravitational pull, allowing the satellite to maintaiRead more

    A geostationary satellite moves continuously in its orbit due to the gravity applied by the Earth on the satellite, corresponding to option [B]. Gravity keeps the satellite in orbit, and the centrifugal force generated by its motion balances this gravitational pull, allowing the satellite to maintain its position above a fixed point on Earth. The satellite’s orbit is synchronized with the Earth’s rotation, resulting in the appearance of a stationary position relative to an observer on the ground. This balance of gravitational and centrifugal forces enables the satellite to orbit Earth at a constant speed, providing consistent coverage for communication, weather monitoring, and other applications. The satellite’s motion is not dependent on rocket engines, nor is it significantly influenced by the gravity of the Sun or the gravitational effect of the satellite on the Earth.

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  3. Cusec, short for cubic feet per second, measures the flow rate of water, corresponding to option [C]. It quantifies the volume of water passing a particular point in a watercourse per unit of time. Cusec is commonly used to assess river flow, irrigation water supply, and water discharge from dams orRead more

    Cusec, short for cubic feet per second, measures the flow rate of water, corresponding to option [C]. It quantifies the volume of water passing a particular point in a watercourse per unit of time. Cusec is commonly used to assess river flow, irrigation water supply, and water discharge from dams or reservoirs. Understanding flow rates is crucial in hydrology, agriculture, civil engineering, and environmental monitoring. For example, in irrigation, cusec helps determine the volume of water needed to irrigate crops efficiently. In hydroelectric power generation, cusec aids in evaluating the potential energy production of a river. By measuring water flow, cusec provides valuable information for water resource management, flood control, and ecosystem preservation efforts. Accurate measurement and interpretation of cusec data enable informed decision-making and sustainable utilization of water resources in various sectors, contributing to efficient water management and environmental stewardship.

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  4. 1 kg/cm² pressure is equivalent to 10.0 bar, denoted by option [C]. Bar is a unit of pressure equal to 100,000 pascals, while 1 kg/cm² is equal to 10,000 pascals. Therefore, to convert from kg/cm² to bar, divide by 1,000, resulting in 10.0 bar. This conversion is essential in various applications, iRead more

    1 kg/cm² pressure is equivalent to 10.0 bar, denoted by option [C]. Bar is a unit of pressure equal to 100,000 pascals, while 1 kg/cm² is equal to 10,000 pascals. Therefore, to convert from kg/cm² to bar, divide by 1,000, resulting in 10.0 bar. This conversion is essential in various applications, including engineering, meteorology, and industrial processes, where pressure measurements are commonly expressed in different units for different purposes. Understanding such conversions ensures accurate communication and interpretation of pressure data across different contexts, facilitating efficient problem-solving and decision-making in relevant fields.

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  5. Pascal is the unit of pressure, corresponding to option [B]. Named after the French mathematician and physicist Blaise Pascal, it is defined as one newton per square meter (N/m²). Pressure measures the force applied perpendicular to the surface of an object per unit area. Pascal is commonly used inRead more

    Pascal is the unit of pressure, corresponding to option [B]. Named after the French mathematician and physicist Blaise Pascal, it is defined as one newton per square meter (N/m²). Pressure measures the force applied perpendicular to the surface of an object per unit area. Pascal is commonly used in various fields, including physics, engineering, meteorology, and fluid dynamics, to quantify pressure in different contexts. In meteorology, for example, atmospheric pressure is often measured in pascals to understand weather patterns and predict changes in atmospheric conditions. In engineering, pascals are used to determine stress and strain in materials under different loads. Understanding pressure is essential for numerous applications, from designing structures that withstand external forces to maintaining optimal conditions in industrial processes. Pascal’s unit provides a standardized and universal measure for quantifying pressure across diverse scientific and engineering disciplines.

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