When two pieces of ice are pressed together, they stick together because of increased pressure, causing the melting point of ice to decrease. The correct option is [A]. When pressure is applied to ice, it lowers the melting point by disrupting the equilibrium between solid and liquid phases. This isRead more
When two pieces of ice are pressed together, they stick together because of increased pressure, causing the melting point of ice to decrease. The correct option is [A]. When pressure is applied to ice, it lowers the melting point by disrupting the equilibrium between solid and liquid phases. This is due to the pressure-induced stabilization of the liquid phase, which lowers the energy barrier for melting. Consequently, the ice molecules can overcome this barrier more easily, leading to melting even at temperatures below the normal melting point. This phenomenon is known as pressure melting. It’s crucial in various natural processes, such as glacier movement, and has practical applications in ice skating and ice climbing. Understanding pressure’s effect on the melting point of ice is essential in various scientific fields, including climatology and materials science.
The correct answer is [D] it can reduce pressure. These strips, known as sleepers or ties, are designed to distribute the weight of the train and reduce pressure impulses, ensuring a smoother ride and reducing the impact on the track and surrounding structures The purpose of shock mats and alternateRead more
The correct answer is [D] it can reduce pressure. These strips, known as sleepers or ties, are designed to distribute the weight of the train and reduce pressure impulses, ensuring a smoother ride and reducing the impact on the track and surrounding structures
The purpose of shock mats and alternate capping layers in railway tracks is to enhance stability, reduce vibrations, and mitigate track degradation. Shock mats, also known as under sleeper pads (USPs), are used to absorb impact forces, reduce strain (reduce pressure) on the ballast layer, and minimize vibrations transmitted to nearby structures.
Alternate capping layers, like elastometric soft pads, aim to create resilience, distribute impact energy, and decrease ballast degradation and sleeper cracking, ultimately improving track performance and longevity.
Sometimes in the mountains, people start bleeding from the nose and mouth because atmospheric pressure decreases with increase in altitude ; option [D]. As altitude increases, the air becomes less dense, leading to lower atmospheric pressure. However, blood pressure does not directly cause this phenRead more
Sometimes in the mountains, people start bleeding from the nose and mouth because atmospheric pressure decreases with increase in altitude ; option [D]. As altitude increases, the air becomes less dense, leading to lower atmospheric pressure. However, blood pressure does not directly cause this phenomenon. Instead, the decreased atmospheric pressure at higher elevations can cause blood vessels in the nose and mouth to rupture, resulting in bleeding.
Ink comes out from a fountain pen in an airplane because air pressure decreases with an increase in altitude ; option [A]. As the aircraft ascends to higher altitudes, the atmospheric pressure surrounding the pen decreases. However, the pressure inside the pen remains relatively constant due to theRead more
Ink comes out from a fountain pen in an airplane because air pressure decreases with an increase in altitude ; option [A]. As the aircraft ascends to higher altitudes, the atmospheric pressure surrounding the pen decreases. However, the pressure inside the pen remains relatively constant due to the sealed environment. This pressure disparity causes the air inside the pen to expand, creating a higher pressure inside than outside. Consequently, the increased pressure inside the pen forces ink out of the nib, leading to ink leakage. This phenomenon occurs because gases, like the air inside the pen, tend to expand when subjected to lower pressure environments. Therefore, the decreasing atmospheric pressure at higher altitudes allows the air inside the pen to expand, pushing the ink outward. As a result, passengers may experience ink leaks from fountain pens during flights, particularly during takeoff and ascent when the altitude rapidly increases, causing a significant drop in atmospheric pressure. Thus, the correct answer is [A] air pressure decreases with increase in altitude.
Option B: The value of 'g' at the surface of the Earth will increase by 2%. When the radius decreases by 1%, the acceleration due to gravity (g) at the surface increases because the gravitational force depends inversely on the square of the distance between two objects. Therefore, a smaller radius lRead more
Option B: The value of ‘g’ at the surface of the Earth will increase by 2%. When the radius decreases by 1%, the acceleration due to gravity (g) at the surface increases because the gravitational force depends inversely on the square of the distance between two objects. Therefore, a smaller radius leads to a stronger gravitational pull, resulting in a 2% increase in ‘g’.
When two pieces of ice are pressed together, the pieces stick together, because
When two pieces of ice are pressed together, they stick together because of increased pressure, causing the melting point of ice to decrease. The correct option is [A]. When pressure is applied to ice, it lowers the melting point by disrupting the equilibrium between solid and liquid phases. This isRead more
When two pieces of ice are pressed together, they stick together because of increased pressure, causing the melting point of ice to decrease. The correct option is [A]. When pressure is applied to ice, it lowers the melting point by disrupting the equilibrium between solid and liquid phases. This is due to the pressure-induced stabilization of the liquid phase, which lowers the energy barrier for melting. Consequently, the ice molecules can overcome this barrier more easily, leading to melting even at temperatures below the normal melting point. This phenomenon is known as pressure melting. It’s crucial in various natural processes, such as glacier movement, and has practical applications in ice skating and ice climbing. Understanding pressure’s effect on the melting point of ice is essential in various scientific fields, including climatology and materials science.
See lessWide strips of wood or concrete are placed under the railway track, so that
The correct answer is [D] it can reduce pressure. These strips, known as sleepers or ties, are designed to distribute the weight of the train and reduce pressure impulses, ensuring a smoother ride and reducing the impact on the track and surrounding structures The purpose of shock mats and alternateRead more
The correct answer is [D] it can reduce pressure. These strips, known as sleepers or ties, are designed to distribute the weight of the train and reduce pressure impulses, ensuring a smoother ride and reducing the impact on the track and surrounding structures
See lessThe purpose of shock mats and alternate capping layers in railway tracks is to enhance stability, reduce vibrations, and mitigate track degradation. Shock mats, also known as under sleeper pads (USPs), are used to absorb impact forces, reduce strain (reduce pressure) on the ballast layer, and minimize vibrations transmitted to nearby structures.
Alternate capping layers, like elastometric soft pads, aim to create resilience, distribute impact energy, and decrease ballast degradation and sleeper cracking, ultimately improving track performance and longevity.
Sometimes in the mountains, people start bleeding from the nose and mouth, because
Sometimes in the mountains, people start bleeding from the nose and mouth because atmospheric pressure decreases with increase in altitude ; option [D]. As altitude increases, the air becomes less dense, leading to lower atmospheric pressure. However, blood pressure does not directly cause this phenRead more
Sometimes in the mountains, people start bleeding from the nose and mouth because atmospheric pressure decreases with increase in altitude ; option [D]. As altitude increases, the air becomes less dense, leading to lower atmospheric pressure. However, blood pressure does not directly cause this phenomenon. Instead, the decreased atmospheric pressure at higher elevations can cause blood vessels in the nose and mouth to rupture, resulting in bleeding.
See lessInk comes out from a fountain pen in an aeroplane, because
Ink comes out from a fountain pen in an airplane because air pressure decreases with an increase in altitude ; option [A]. As the aircraft ascends to higher altitudes, the atmospheric pressure surrounding the pen decreases. However, the pressure inside the pen remains relatively constant due to theRead more
Ink comes out from a fountain pen in an airplane because air pressure decreases with an increase in altitude ; option [A]. As the aircraft ascends to higher altitudes, the atmospheric pressure surrounding the pen decreases. However, the pressure inside the pen remains relatively constant due to the sealed environment. This pressure disparity causes the air inside the pen to expand, creating a higher pressure inside than outside. Consequently, the increased pressure inside the pen forces ink out of the nib, leading to ink leakage. This phenomenon occurs because gases, like the air inside the pen, tend to expand when subjected to lower pressure environments. Therefore, the decreasing atmospheric pressure at higher altitudes allows the air inside the pen to expand, pushing the ink outward. As a result, passengers may experience ink leaks from fountain pens during flights, particularly during takeoff and ascent when the altitude rapidly increases, causing a significant drop in atmospheric pressure. Thus, the correct answer is [A] air pressure decreases with increase in altitude.
See lessIf the mass of the Earth remains the same and the radius decreases by 1%, then the value of g at the surface of the Earth will increase by
Option B: The value of 'g' at the surface of the Earth will increase by 2%. When the radius decreases by 1%, the acceleration due to gravity (g) at the surface increases because the gravitational force depends inversely on the square of the distance between two objects. Therefore, a smaller radius lRead more
Option B: The value of ‘g’ at the surface of the Earth will increase by 2%. When the radius decreases by 1%, the acceleration due to gravity (g) at the surface increases because the gravitational force depends inversely on the square of the distance between two objects. Therefore, a smaller radius leads to a stronger gravitational pull, resulting in a 2% increase in ‘g’.
See less