When a bucket of water is rotated very fast in a vertical circle, the water does not fall from the bucket even at its highest position due to centrifugal force; option [A]. Centrifugal force is an apparent force that acts outward from the center of rotation. As the bucket spins, centrifugal force puRead more
When a bucket of water is rotated very fast in a vertical circle, the water does not fall from the bucket even at its highest position due to centrifugal force; option [A]. Centrifugal force is an apparent force that acts outward from the center of rotation. As the bucket spins, centrifugal force pushes the water outward, counteracting the gravitational force pulling the water downward. At the highest point of the bucket’s rotation, the centrifugal force is greater than the gravitational force, preventing the water from falling out. Option A correctly identifies this scenario: centrifugal force exceeds the weight of the water. This balance between centrifugal force and gravity keeps the water contained within the bucket throughout the circular motion. However, it is essential to note that this equilibrium is fragile, and if the rotational speed decreases or the centrifugal force weakens, the water may spill out due to gravitational pull. Therefore, centrifugal force’s dominance over gravity is crucial in maintaining the water’s position within the bucket during vertical circular motion.
The working principle of a washing machine is centrifugation; option [A]. During the spin cycle, the machine rapidly rotates the drum, creating centrifugal force. This force pushes water and detergent outwards from the clothes, effectively removing dirt and stains. The centrifugal motion also helpsRead more
The working principle of a washing machine is centrifugation; option [A]. During the spin cycle, the machine rapidly rotates the drum, creating centrifugal force. This force pushes water and detergent outwards from the clothes, effectively removing dirt and stains. The centrifugal motion also helps separate the water and detergent solution from the fabric, allowing it to be drained away. This process aids in the efficient cleaning of laundry by expelling dirt and soapy water from the clothing fibers. Option A, centrifugation, accurately represents this fundamental mechanism of washing machines, emphasizing the role of centrifugal force in achieving thorough cleaning results. By harnessing centrifugation, washing machines provide a practical and effective solution for household laundry needs, ensuring that clothes are cleaned efficiently and thoroughly. The application of centrifugal force enables washing machines to achieve high-performance cleaning, making them indispensable appliances in modern households worldwide. Therefore, centrifugation stands as the primary working principle behind the operation of washing machines, ensuring optimal cleanliness and hygiene for laundered items.
The reason for there being no atmosphere on the Moon is; option [D]. The escape velocity of gas molecules on it is less than their root mean square velocity. This means that gas molecules on the Moon can attain speeds greater than the escape velocity, allowing them to escape into space rather than rRead more
The reason for there being no atmosphere on the Moon is; option [D]. The escape velocity of gas molecules on it is less than their root mean square velocity. This means that gas molecules on the Moon can attain speeds greater than the escape velocity, allowing them to escape into space rather than remain bound by lunar gravity. As a result, the Moon lacks a significant atmosphere, unlike Earth, where the escape velocity is higher, allowing the atmosphere to be retained. Other factors such as proximity to Earth (option A), receiving sunlight (option B), and orbiting the Earth (option C) do not directly determine the presence or absence of an atmosphere on the Moon.
Jet engines work on the principle of conservation of linear momentum, which is; option [C]. According to Newton's third law, for every action, there is an equal and opposite reaction. In a jet engine, fuel combustion generates high-speed exhaust gases expelled backwards, imparting momentum to the enRead more
Jet engines work on the principle of conservation of linear momentum, which is; option [C]. According to Newton’s third law, for every action, there is an equal and opposite reaction. In a jet engine, fuel combustion generates high-speed exhaust gases expelled backwards, imparting momentum to the engine in the forward direction. This action-reaction pair conserves linear momentum. The engine accelerates forward due to the expulsion of exhaust gases, propelling the aircraft forward. This principle underpins the operation of jet engines, allowing them to generate thrust efficiently for propulsion. While conservation of energy (option A) and mass (option B) are also fundamental principles in physics, they do not directly govern the operation of jet engines. Similarly, conservation of angular momentum (option D) is not relevant to the linear motion of jet engines, which primarily rely on conservation of linear momentum for propulsion.
The minimum velocity required for a rocket to overcome Earth's gravity and go into space when launched from the Earth's surface is 11.2 km/s, which is; option [A]. This velocity is known as the escape velocity. It represents the speed needed for an object to break free from Earth's gravitational pulRead more
The minimum velocity required for a rocket to overcome Earth’s gravity and go into space when launched from the Earth’s surface is 11.2 km/s, which is; option [A]. This velocity is known as the escape velocity. It represents the speed needed for an object to break free from Earth’s gravitational pull and enter space. Achieving this velocity allows the rocket to counteract the gravitational force pulling it towards the Earth, enabling it to travel beyond Earth’s atmosphere and into space. Option A accurately identifies this critical velocity required for space travel, highlighting the significance of understanding escape velocity in aerospace engineering and space exploration. Rockets must reach or exceed this velocity to successfully achieve orbit or travel to other celestial bodies, illustrating its crucial role in enabling human spaceflight and the exploration of the cosmos.
When a bucket of water is rotated very fast in a vertical circle, then the water does not fall from the bucket even from its highest position, because
When a bucket of water is rotated very fast in a vertical circle, the water does not fall from the bucket even at its highest position due to centrifugal force; option [A]. Centrifugal force is an apparent force that acts outward from the center of rotation. As the bucket spins, centrifugal force puRead more
When a bucket of water is rotated very fast in a vertical circle, the water does not fall from the bucket even at its highest position due to centrifugal force; option [A]. Centrifugal force is an apparent force that acts outward from the center of rotation. As the bucket spins, centrifugal force pushes the water outward, counteracting the gravitational force pulling the water downward. At the highest point of the bucket’s rotation, the centrifugal force is greater than the gravitational force, preventing the water from falling out. Option A correctly identifies this scenario: centrifugal force exceeds the weight of the water. This balance between centrifugal force and gravity keeps the water contained within the bucket throughout the circular motion. However, it is essential to note that this equilibrium is fragile, and if the rotational speed decreases or the centrifugal force weakens, the water may spill out due to gravitational pull. Therefore, centrifugal force’s dominance over gravity is crucial in maintaining the water’s position within the bucket during vertical circular motion.
See lessThe working principle of a washing machine is
The working principle of a washing machine is centrifugation; option [A]. During the spin cycle, the machine rapidly rotates the drum, creating centrifugal force. This force pushes water and detergent outwards from the clothes, effectively removing dirt and stains. The centrifugal motion also helpsRead more
The working principle of a washing machine is centrifugation; option [A]. During the spin cycle, the machine rapidly rotates the drum, creating centrifugal force. This force pushes water and detergent outwards from the clothes, effectively removing dirt and stains. The centrifugal motion also helps separate the water and detergent solution from the fabric, allowing it to be drained away. This process aids in the efficient cleaning of laundry by expelling dirt and soapy water from the clothing fibers. Option A, centrifugation, accurately represents this fundamental mechanism of washing machines, emphasizing the role of centrifugal force in achieving thorough cleaning results. By harnessing centrifugation, washing machines provide a practical and effective solution for household laundry needs, ensuring that clothes are cleaned efficiently and thoroughly. The application of centrifugal force enables washing machines to achieve high-performance cleaning, making them indispensable appliances in modern households worldwide. Therefore, centrifugation stands as the primary working principle behind the operation of washing machines, ensuring optimal cleanliness and hygiene for laundered items.
See lessWhat is the reason for there being no atmosphere on the Moon?
The reason for there being no atmosphere on the Moon is; option [D]. The escape velocity of gas molecules on it is less than their root mean square velocity. This means that gas molecules on the Moon can attain speeds greater than the escape velocity, allowing them to escape into space rather than rRead more
The reason for there being no atmosphere on the Moon is; option [D]. The escape velocity of gas molecules on it is less than their root mean square velocity. This means that gas molecules on the Moon can attain speeds greater than the escape velocity, allowing them to escape into space rather than remain bound by lunar gravity. As a result, the Moon lacks a significant atmosphere, unlike Earth, where the escape velocity is higher, allowing the atmosphere to be retained. Other factors such as proximity to Earth (option A), receiving sunlight (option B), and orbiting the Earth (option C) do not directly determine the presence or absence of an atmosphere on the Moon.
See lessJet engine works on the principle of conservation of what?
Jet engines work on the principle of conservation of linear momentum, which is; option [C]. According to Newton's third law, for every action, there is an equal and opposite reaction. In a jet engine, fuel combustion generates high-speed exhaust gases expelled backwards, imparting momentum to the enRead more
Jet engines work on the principle of conservation of linear momentum, which is; option [C]. According to Newton’s third law, for every action, there is an equal and opposite reaction. In a jet engine, fuel combustion generates high-speed exhaust gases expelled backwards, imparting momentum to the engine in the forward direction. This action-reaction pair conserves linear momentum. The engine accelerates forward due to the expulsion of exhaust gases, propelling the aircraft forward. This principle underpins the operation of jet engines, allowing them to generate thrust efficiently for propulsion. While conservation of energy (option A) and mass (option B) are also fundamental principles in physics, they do not directly govern the operation of jet engines. Similarly, conservation of angular momentum (option D) is not relevant to the linear motion of jet engines, which primarily rely on conservation of linear momentum for propulsion.
See lessWith what minimum velocity will a rocket overcome the Earth’s gravity and go into space when launched from the Earth’s surface?
The minimum velocity required for a rocket to overcome Earth's gravity and go into space when launched from the Earth's surface is 11.2 km/s, which is; option [A]. This velocity is known as the escape velocity. It represents the speed needed for an object to break free from Earth's gravitational pulRead more
The minimum velocity required for a rocket to overcome Earth’s gravity and go into space when launched from the Earth’s surface is 11.2 km/s, which is; option [A]. This velocity is known as the escape velocity. It represents the speed needed for an object to break free from Earth’s gravitational pull and enter space. Achieving this velocity allows the rocket to counteract the gravitational force pulling it towards the Earth, enabling it to travel beyond Earth’s atmosphere and into space. Option A accurately identifies this critical velocity required for space travel, highlighting the significance of understanding escape velocity in aerospace engineering and space exploration. Rockets must reach or exceed this velocity to successfully achieve orbit or travel to other celestial bodies, illustrating its crucial role in enabling human spaceflight and the exploration of the cosmos.
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