The reason for the floating of clouds in the atmosphere is density (D). Clouds consist of tiny water droplets or ice crystals that are less dense than the surrounding air. This lower density causes the clouds to float or remain suspended in the atmosphere. Temperature (A), velocity (B), and pressureRead more
The reason for the floating of clouds in the atmosphere is density (D). Clouds consist of tiny water droplets or ice crystals that are less dense than the surrounding air. This lower density causes the clouds to float or remain suspended in the atmosphere. Temperature (A), velocity (B), and pressure (C) can influence cloud formation and movement but are not the primary reasons for their floating. Density, on the other hand, directly affects the buoyancy of clouds, as they rise and fall within the atmosphere based on changes in temperature and pressure gradients. Thus, clouds float due to their lower density compared to the surrounding air, making option (D) the correct choice for explaining the phenomenon of cloud floating in the atmosphere.
Approximately 1/10 part of an iceberg floating in the sea remains above the surface of the sea (B). This is due to Archimedes' principle, which states that the buoyant force acting on a submerged object is equal to the weight of the fluid displaced by the object. Icebergs are made of freshwater ice,Read more
Approximately 1/10 part of an iceberg floating in the sea remains above the surface of the sea (B). This is due to Archimedes’ principle, which states that the buoyant force acting on a submerged object is equal to the weight of the fluid displaced by the object. Icebergs are made of freshwater ice, which has a density of about 0.92 g/cm³, while seawater has a density of about 1.025 g/cm³. Because the density of ice is lower than that of seawater, only about 1/10 of the iceberg’s volume is above the surface, while the rest is submerged. This ratio can vary depending on factors such as the iceberg’s shape and density distribution. Option (B) 1/10 accurately represents this fraction, making it the correct answer.
The wall below the dam is made thick because the pressure of the fluid increases with increasing depth (A). This is due to the weight of the fluid above exerting a force on the lower levels. A thicker wall is needed to withstand the greater force exerted by the fluid against it as the depth increaseRead more
The wall below the dam is made thick because the pressure of the fluid increases with increasing depth (A). This is due to the weight of the fluid above exerting a force on the lower levels. A thicker wall is needed to withstand the greater force exerted by the fluid against it as the depth increases. This principle is described by Pascal’s law, which states that pressure applied to a fluid in a confined space is transmitted undiminished throughout the fluid. Therefore, as the depth below the dam increases, the pressure exerted by the water against the wall also increases. Option (A) accurately reflects this relationship between pressure and depth, making it the correct choice for explaining the necessity of a thick wall below the dam.
Skating on ice shows that on increasing the pressure, the melting point of ice decreases (B). When pressure is applied by the skater's weight, it lowers the melting point of the ice underneath the skate blades. This occurs because pressure causes the ice molecules to come closer together, making itRead more
Skating on ice shows that on increasing the pressure, the melting point of ice decreases (B). When pressure is applied by the skater’s weight, it lowers the melting point of the ice underneath the skate blades. This occurs because pressure causes the ice molecules to come closer together, making it harder for them to maintain their solid structure. As a result, the ice briefly melts, forming a thin layer of water between the skate blades and the ice surface. This reduced melting point allows for easier gliding of the skates on the ice. Option (B) accurately reflects this phenomenon, indicating that the melting point of ice decreases under increased pressure, making it the correct choice to explain the observation of skating on ice.
The ball keeps dancing in the water spray at intersections because due to higher velocity of water, pressure becomes higher (B). As the water exits the nozzle at high speed, its kinetic energy increases, resulting in an increase in pressure according to Bernoulli's principle. This higher pressure arRead more
The ball keeps dancing in the water spray at intersections because due to higher velocity of water, pressure becomes higher (B). As the water exits the nozzle at high speed, its kinetic energy increases, resulting in an increase in pressure according to Bernoulli’s principle. This higher pressure around the ball creates a force that propels it and causes it to dance in the spray. Options (A), (C), and (D) are not relevant to the phenomenon described. Surface tension (C) typically refers to the cohesive forces between liquid molecules at the surface, not applicable to the situation. Viscosity (D) relates to a fluid’s resistance to flow, which does not directly influence the ball’s dancing behavior. Therefore, option (B) accurately explains the mechanism behind the ball’s movement in the water spray at intersections.
The reason for floating of clouds in the atmosphere is
The reason for the floating of clouds in the atmosphere is density (D). Clouds consist of tiny water droplets or ice crystals that are less dense than the surrounding air. This lower density causes the clouds to float or remain suspended in the atmosphere. Temperature (A), velocity (B), and pressureRead more
The reason for the floating of clouds in the atmosphere is density (D). Clouds consist of tiny water droplets or ice crystals that are less dense than the surrounding air. This lower density causes the clouds to float or remain suspended in the atmosphere. Temperature (A), velocity (B), and pressure (C) can influence cloud formation and movement but are not the primary reasons for their floating. Density, on the other hand, directly affects the buoyancy of clouds, as they rise and fall within the atmosphere based on changes in temperature and pressure gradients. Thus, clouds float due to their lower density compared to the surrounding air, making option (D) the correct choice for explaining the phenomenon of cloud floating in the atmosphere.
See lessHow much part of the iceberg floating in the sea remains above the surface of the sea?
Approximately 1/10 part of an iceberg floating in the sea remains above the surface of the sea (B). This is due to Archimedes' principle, which states that the buoyant force acting on a submerged object is equal to the weight of the fluid displaced by the object. Icebergs are made of freshwater ice,Read more
Approximately 1/10 part of an iceberg floating in the sea remains above the surface of the sea (B). This is due to Archimedes’ principle, which states that the buoyant force acting on a submerged object is equal to the weight of the fluid displaced by the object. Icebergs are made of freshwater ice, which has a density of about 0.92 g/cm³, while seawater has a density of about 1.025 g/cm³. Because the density of ice is lower than that of seawater, only about 1/10 of the iceberg’s volume is above the surface, while the rest is submerged. This ratio can vary depending on factors such as the iceberg’s shape and density distribution. Option (B) 1/10 accurately represents this fraction, making it the correct answer.
See lessThe wall below the dam is made thick because
The wall below the dam is made thick because the pressure of the fluid increases with increasing depth (A). This is due to the weight of the fluid above exerting a force on the lower levels. A thicker wall is needed to withstand the greater force exerted by the fluid against it as the depth increaseRead more
The wall below the dam is made thick because the pressure of the fluid increases with increasing depth (A). This is due to the weight of the fluid above exerting a force on the lower levels. A thicker wall is needed to withstand the greater force exerted by the fluid against it as the depth increases. This principle is described by Pascal’s law, which states that pressure applied to a fluid in a confined space is transmitted undiminished throughout the fluid. Therefore, as the depth below the dam increases, the pressure exerted by the water against the wall also increases. Option (A) accurately reflects this relationship between pressure and depth, making it the correct choice for explaining the necessity of a thick wall below the dam.
See lessSkating on ice shows that on increasing the pressure the melting point of ice
Skating on ice shows that on increasing the pressure, the melting point of ice decreases (B). When pressure is applied by the skater's weight, it lowers the melting point of the ice underneath the skate blades. This occurs because pressure causes the ice molecules to come closer together, making itRead more
Skating on ice shows that on increasing the pressure, the melting point of ice decreases (B). When pressure is applied by the skater’s weight, it lowers the melting point of the ice underneath the skate blades. This occurs because pressure causes the ice molecules to come closer together, making it harder for them to maintain their solid structure. As a result, the ice briefly melts, forming a thin layer of water between the skate blades and the ice surface. This reduced melting point allows for easier gliding of the skates on the ice. Option (B) accurately reflects this phenomenon, indicating that the melting point of ice decreases under increased pressure, making it the correct choice to explain the observation of skating on ice.
See lessThe ball keeps dancing in the water spray at intersections because
The ball keeps dancing in the water spray at intersections because due to higher velocity of water, pressure becomes higher (B). As the water exits the nozzle at high speed, its kinetic energy increases, resulting in an increase in pressure according to Bernoulli's principle. This higher pressure arRead more
The ball keeps dancing in the water spray at intersections because due to higher velocity of water, pressure becomes higher (B). As the water exits the nozzle at high speed, its kinetic energy increases, resulting in an increase in pressure according to Bernoulli’s principle. This higher pressure around the ball creates a force that propels it and causes it to dance in the spray. Options (A), (C), and (D) are not relevant to the phenomenon described. Surface tension (C) typically refers to the cohesive forces between liquid molecules at the surface, not applicable to the situation. Viscosity (D) relates to a fluid’s resistance to flow, which does not directly influence the ball’s dancing behavior. Therefore, option (B) accurately explains the mechanism behind the ball’s movement in the water spray at intersections.
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