There is no atmosphere on the Moon because its escape velocity is less than the root mean square velocity of atoms; option [D]. This means that gas molecules on the Moon can easily escape into space due to insufficient gravitational pull. Consequently, over time, the Moon lost its atmosphere, resultRead more
There is no atmosphere on the Moon because its escape velocity is less than the root mean square velocity of atoms; option [D]. This means that gas molecules on the Moon can easily escape into space due to insufficient gravitational pull. Consequently, over time, the Moon lost its atmosphere, resulting in its current lack of significant atmospheric gases. This phenomenon contrasts with Earth, which has a sufficiently strong gravitational pull to retain its atmosphere. The Moon’s proximity to the Earth or its revolution around the Sun doesn’t directly affect its lack of atmosphere. While sunlight does reach the Moon, the absence of a significant atmosphere prevents it from creating conditions conducive to atmospheric processes like those on Earth. Therefore, the correct option is [D] Here the escape velocity of atoms is less than their root mean square velocity, elucidating the fundamental reason for the Moon’s lack of atmosphere.
One Horse Power (H.P) is equal to 746 watts; option [C]. This conversion factor is crucial in engineering and physics, especially in determining the power output of engines, motors, and other mechanical devices. It originates from the work of James Watt, who developed the concept of horsepower to coRead more
One Horse Power (H.P) is equal to 746 watts; option [C]. This conversion factor is crucial in engineering and physics, especially in determining the power output of engines, motors, and other mechanical devices. It originates from the work of James Watt, who developed the concept of horsepower to compare the power of steam engines to that of draft horses. Over time, it became a standard unit of power measurement globally. Option [C] 746 watts accurately represents this conversion factor, highlighting the significant relationship between horsepower and watts in quantifying mechanical power. This conversion facilitates efficient communication and calculation in various fields, ensuring consistency and accuracy in power measurements across different systems and applications.
A runner runs for some distance before taking a long jump because the inertia of his body helps him cover more distance during the jump; option [C]. Running increases the momentum of his body, enabling him to generate more force and velocity, which translates into greater distance during the jump. TRead more
A runner runs for some distance before taking a long jump because the inertia of his body helps him cover more distance during the jump; option [C]. Running increases the momentum of his body, enabling him to generate more force and velocity, which translates into greater distance during the jump. Therefore, the correct option is [C] While jumping, the inertia of his body helps him to cover more distance. This strategy is commonly employed in long jump events to maximize the distance achieved, utilizing the momentum gained from running to propel the body further through the air during the jump. It optimizes the athlete’s performance by harnessing the principles of physics, specifically inertia, to enhance the effectiveness of the jump and achieve greater distances.
When two stones of different masses are dropped simultaneously from the top of a building, both stones reach the ground together; option [C]. This phenomenon occurs due to the absence of significant air resistance, and according to the principle of universal gravitation, all objects fall at the sameRead more
When two stones of different masses are dropped simultaneously from the top of a building, both stones reach the ground together; option [C]. This phenomenon occurs due to the absence of significant air resistance, and according to the principle of universal gravitation, all objects fall at the same rate regardless of their mass. Therefore, neither the smaller nor the larger stone reaches the ground before the other. The composition of the stone does not affect this outcome. This concept is a fundamental principle in physics known as the equivalence principle, which states that in a vacuum, all objects experience the same acceleration due to gravity regardless of their mass. Thus, the correct option is [C] Both the stones reach the ground together, illustrating a fundamental aspect of gravitational physics.
Mercury has the lowest density among the listed liquids; option [D]. Mercury's density is approximately 13.6 grams per cubic centimeter (g/cm³), making it much denser than the other options. Clean water typically has a density around 1 g/cm³, while salty water, which contains dissolved salts, may haRead more
Mercury has the lowest density among the listed liquids; option [D]. Mercury’s density is approximately 13.6 grams per cubic centimeter (g/cm³), making it much denser than the other options. Clean water typically has a density around 1 g/cm³, while salty water, which contains dissolved salts, may have a slightly higher density due to the added solutes. Petrol, a liquid hydrocarbon mixture used as fuel, has a density generally lower than water but higher than mercury. However, even petrol’s density is significantly higher than that of mercury. Mercury’s low density is attributed to its atomic structure, consisting of relatively large and heavy atoms closely packed together. This density difference is why mercury sinks when mixed with water, as water has a lower density. Therefore, when comparing the densities of clean water, salty water, petrol, and mercury, mercury has the lowest density, making it unique among the options provided. Thus, the correct option is [D] Mercury.
There is no atmosphere on the Moon, because
There is no atmosphere on the Moon because its escape velocity is less than the root mean square velocity of atoms; option [D]. This means that gas molecules on the Moon can easily escape into space due to insufficient gravitational pull. Consequently, over time, the Moon lost its atmosphere, resultRead more
There is no atmosphere on the Moon because its escape velocity is less than the root mean square velocity of atoms; option [D]. This means that gas molecules on the Moon can easily escape into space due to insufficient gravitational pull. Consequently, over time, the Moon lost its atmosphere, resulting in its current lack of significant atmospheric gases. This phenomenon contrasts with Earth, which has a sufficiently strong gravitational pull to retain its atmosphere. The Moon’s proximity to the Earth or its revolution around the Sun doesn’t directly affect its lack of atmosphere. While sunlight does reach the Moon, the absence of a significant atmosphere prevents it from creating conditions conducive to atmospheric processes like those on Earth. Therefore, the correct option is [D] Here the escape velocity of atoms is less than their root mean square velocity, elucidating the fundamental reason for the Moon’s lack of atmosphere.
See lessOne Horse Power (H.P) is equal to how many watts?
One Horse Power (H.P) is equal to 746 watts; option [C]. This conversion factor is crucial in engineering and physics, especially in determining the power output of engines, motors, and other mechanical devices. It originates from the work of James Watt, who developed the concept of horsepower to coRead more
One Horse Power (H.P) is equal to 746 watts; option [C]. This conversion factor is crucial in engineering and physics, especially in determining the power output of engines, motors, and other mechanical devices. It originates from the work of James Watt, who developed the concept of horsepower to compare the power of steam engines to that of draft horses. Over time, it became a standard unit of power measurement globally. Option [C] 746 watts accurately represents this conversion factor, highlighting the significant relationship between horsepower and watts in quantifying mechanical power. This conversion facilitates efficient communication and calculation in various fields, ensuring consistency and accuracy in power measurements across different systems and applications.
See lessA runner runs for some distance before taking a long jump, because
A runner runs for some distance before taking a long jump because the inertia of his body helps him cover more distance during the jump; option [C]. Running increases the momentum of his body, enabling him to generate more force and velocity, which translates into greater distance during the jump. TRead more
A runner runs for some distance before taking a long jump because the inertia of his body helps him cover more distance during the jump; option [C]. Running increases the momentum of his body, enabling him to generate more force and velocity, which translates into greater distance during the jump. Therefore, the correct option is [C] While jumping, the inertia of his body helps him to cover more distance. This strategy is commonly employed in long jump events to maximize the distance achieved, utilizing the momentum gained from running to propel the body further through the air during the jump. It optimizes the athlete’s performance by harnessing the principles of physics, specifically inertia, to enhance the effectiveness of the jump and achieve greater distances.
See lessTwo stones of different masses are dropped simultaneously from the top of a building
When two stones of different masses are dropped simultaneously from the top of a building, both stones reach the ground together; option [C]. This phenomenon occurs due to the absence of significant air resistance, and according to the principle of universal gravitation, all objects fall at the sameRead more
When two stones of different masses are dropped simultaneously from the top of a building, both stones reach the ground together; option [C]. This phenomenon occurs due to the absence of significant air resistance, and according to the principle of universal gravitation, all objects fall at the same rate regardless of their mass. Therefore, neither the smaller nor the larger stone reaches the ground before the other. The composition of the stone does not affect this outcome. This concept is a fundamental principle in physics known as the equivalence principle, which states that in a vacuum, all objects experience the same acceleration due to gravity regardless of their mass. Thus, the correct option is [C] Both the stones reach the ground together, illustrating a fundamental aspect of gravitational physics.
See lessWhich of the following liquids has the lowest density?
Mercury has the lowest density among the listed liquids; option [D]. Mercury's density is approximately 13.6 grams per cubic centimeter (g/cm³), making it much denser than the other options. Clean water typically has a density around 1 g/cm³, while salty water, which contains dissolved salts, may haRead more
Mercury has the lowest density among the listed liquids; option [D]. Mercury’s density is approximately 13.6 grams per cubic centimeter (g/cm³), making it much denser than the other options. Clean water typically has a density around 1 g/cm³, while salty water, which contains dissolved salts, may have a slightly higher density due to the added solutes. Petrol, a liquid hydrocarbon mixture used as fuel, has a density generally lower than water but higher than mercury. However, even petrol’s density is significantly higher than that of mercury. Mercury’s low density is attributed to its atomic structure, consisting of relatively large and heavy atoms closely packed together. This density difference is why mercury sinks when mixed with water, as water has a lower density. Therefore, when comparing the densities of clean water, salty water, petrol, and mercury, mercury has the lowest density, making it unique among the options provided. Thus, the correct option is [D] Mercury.
See less