An iron nail floats in mercury, whereas it sinks in water because the density of iron is more than that of water and less than that of mercury (C). Density is the mass of a substance per unit volume. Iron has a higher density than water but a lower density than mercury. Therefore, when placed in merRead more
An iron nail floats in mercury, whereas it sinks in water because the density of iron is more than that of water and less than that of mercury (C). Density is the mass of a substance per unit volume. Iron has a higher density than water but a lower density than mercury. Therefore, when placed in mercury, which is denser than water, the iron nail displaces less mercury than its own weight, allowing it to float. In water, however, the iron nail displaces less water than its own weight, causing it to sink. Options (A) and (D) are incorrect because they do not explain the phenomenon of flotation based on density. Option (B) is also incorrect because it focuses solely on weight, disregarding the role of density. Therefore, the correct option is (C) The density of iron is more than that of water and less than that of mercury.
When a solid body is immersed in water, its weight decreases. This loss is equal to the weight of displaced water (A). Archimedes' principle states that the buoyant force acting on a submerged object is equal to the weight of the displaced fluid. Therefore, the weight loss of the solid body when immRead more
When a solid body is immersed in water, its weight decreases. This loss is equal to the weight of displaced water (A). Archimedes’ principle states that the buoyant force acting on a submerged object is equal to the weight of the displaced fluid. Therefore, the weight loss of the solid body when immersed in water is precisely equal to the weight of the water it displaces. This principle applies regardless of the shape or material of the submerged object. Options (B), (C), and (D) are incorrect because they do not align with Archimedes’ principle, which clearly establishes the relationship between the weight loss of a submerged object and the weight of the displaced water. Therefore, the correct option is (A) Equal to the weight of displaced water.
Ice floats in water, but sinks in alcohol because ice is lighter than water and heavier than alcohol (D). This phenomenon is governed by Archimedes' principle, which states that a floating object displaces a volume of fluid equal to its own weight. Ice has a lower density than water, so it displacesRead more
Ice floats in water, but sinks in alcohol because ice is lighter than water and heavier than alcohol (D). This phenomenon is governed by Archimedes’ principle, which states that a floating object displaces a volume of fluid equal to its own weight. Ice has a lower density than water, so it displaces its weight in water, causing it to float. In contrast, ice has a higher density than alcohol, so it cannot displace its weight in alcohol, causing it to sink. Options (A), (B), and (C) are unrelated to the buoyancy of ice in water and alcohol and do not explain the observed phenomenon. Therefore, the correct option is (D) Ice is lighter than water and heavier than alcohol, as it accurately describes the density relationship responsible for the behavior of ice in different liquids.
The density of water is maximum at 4 °C (A). At this temperature, water molecules arrange themselves in a highly ordered structure due to hydrogen bonding. This arrangement allows for the closest packing of molecules, resulting in the highest density. As the temperature deviates from 4 °C, the densiRead more
The density of water is maximum at 4 °C (A). At this temperature, water molecules arrange themselves in a highly ordered structure due to hydrogen bonding. This arrangement allows for the closest packing of molecules, resulting in the highest density. As the temperature deviates from 4 °C, the density of water decreases. Options (B), (C), and (D) are incorrect. Kelvin temperature (K) is an absolute scale, where 4 K is equivalent to -269.15 °C, far below the maximum density temperature of water. Fahrenheit temperature (°F) is a different scale, not relevant to the maximum density of water. Option (D) represents a negative temperature, which is not meaningful in this context. Therefore, the correct option is (A) 4 °C, as it corresponds to the temperature at which water exhibits its maximum density due to the specific arrangement of its molecules.
A swimmer finds it easier to swim in seawater than in a river because the density of seawater is higher than that of ordinary water (C). Higher density in seawater provides more buoyant force, allowing the swimmer to float more easily and requiring less effort to stay afloat. This increased buoyancyRead more
A swimmer finds it easier to swim in seawater than in a river because the density of seawater is higher than that of ordinary water (C). Higher density in seawater provides more buoyant force, allowing the swimmer to float more easily and requiring less effort to stay afloat. This increased buoyancy aids in maintaining proper body positioning and reduces the risk of sinking. Additionally, the salt content in seawater contributes to increased buoyancy compared to freshwater. Options (A), (B), and (D) are irrelevant to the ease of swimming in seawater and do not address the specific physical properties that make swimming easier, such as buoyancy. Therefore, the correct option is (C) The density of seawater is higher than that of ordinary water.
Why does an iron nail float in mercury, whereas it sinks in water?
An iron nail floats in mercury, whereas it sinks in water because the density of iron is more than that of water and less than that of mercury (C). Density is the mass of a substance per unit volume. Iron has a higher density than water but a lower density than mercury. Therefore, when placed in merRead more
An iron nail floats in mercury, whereas it sinks in water because the density of iron is more than that of water and less than that of mercury (C). Density is the mass of a substance per unit volume. Iron has a higher density than water but a lower density than mercury. Therefore, when placed in mercury, which is denser than water, the iron nail displaces less mercury than its own weight, allowing it to float. In water, however, the iron nail displaces less water than its own weight, causing it to sink. Options (A) and (D) are incorrect because they do not explain the phenomenon of flotation based on density. Option (B) is also incorrect because it focuses solely on weight, disregarding the role of density. Therefore, the correct option is (C) The density of iron is more than that of water and less than that of mercury.
See lessWhen a solid body is immersed in water, its weight decreases. How much is this loss?
When a solid body is immersed in water, its weight decreases. This loss is equal to the weight of displaced water (A). Archimedes' principle states that the buoyant force acting on a submerged object is equal to the weight of the displaced fluid. Therefore, the weight loss of the solid body when immRead more
When a solid body is immersed in water, its weight decreases. This loss is equal to the weight of displaced water (A). Archimedes’ principle states that the buoyant force acting on a submerged object is equal to the weight of the displaced fluid. Therefore, the weight loss of the solid body when immersed in water is precisely equal to the weight of the water it displaces. This principle applies regardless of the shape or material of the submerged object. Options (B), (C), and (D) are incorrect because they do not align with Archimedes’ principle, which clearly establishes the relationship between the weight loss of a submerged object and the weight of the displaced water. Therefore, the correct option is (A) Equal to the weight of displaced water.
See lessIce floats in water, but sinks in alcohol. Because
Ice floats in water, but sinks in alcohol because ice is lighter than water and heavier than alcohol (D). This phenomenon is governed by Archimedes' principle, which states that a floating object displaces a volume of fluid equal to its own weight. Ice has a lower density than water, so it displacesRead more
Ice floats in water, but sinks in alcohol because ice is lighter than water and heavier than alcohol (D). This phenomenon is governed by Archimedes’ principle, which states that a floating object displaces a volume of fluid equal to its own weight. Ice has a lower density than water, so it displaces its weight in water, causing it to float. In contrast, ice has a higher density than alcohol, so it cannot displace its weight in alcohol, causing it to sink. Options (A), (B), and (C) are unrelated to the buoyancy of ice in water and alcohol and do not explain the observed phenomenon. Therefore, the correct option is (D) Ice is lighter than water and heavier than alcohol, as it accurately describes the density relationship responsible for the behavior of ice in different liquids.
See lessThe density of water is maximum at
The density of water is maximum at 4 °C (A). At this temperature, water molecules arrange themselves in a highly ordered structure due to hydrogen bonding. This arrangement allows for the closest packing of molecules, resulting in the highest density. As the temperature deviates from 4 °C, the densiRead more
The density of water is maximum at 4 °C (A). At this temperature, water molecules arrange themselves in a highly ordered structure due to hydrogen bonding. This arrangement allows for the closest packing of molecules, resulting in the highest density. As the temperature deviates from 4 °C, the density of water decreases. Options (B), (C), and (D) are incorrect. Kelvin temperature (K) is an absolute scale, where 4 K is equivalent to -269.15 °C, far below the maximum density temperature of water. Fahrenheit temperature (°F) is a different scale, not relevant to the maximum density of water. Option (D) represents a negative temperature, which is not meaningful in this context. Therefore, the correct option is (A) 4 °C, as it corresponds to the temperature at which water exhibits its maximum density due to the specific arrangement of its molecules.
See lessWhy does a swimmer find it easier to swim in sea water than in river?
A swimmer finds it easier to swim in seawater than in a river because the density of seawater is higher than that of ordinary water (C). Higher density in seawater provides more buoyant force, allowing the swimmer to float more easily and requiring less effort to stay afloat. This increased buoyancyRead more
A swimmer finds it easier to swim in seawater than in a river because the density of seawater is higher than that of ordinary water (C). Higher density in seawater provides more buoyant force, allowing the swimmer to float more easily and requiring less effort to stay afloat. This increased buoyancy aids in maintaining proper body positioning and reduces the risk of sinking. Additionally, the salt content in seawater contributes to increased buoyancy compared to freshwater. Options (A), (B), and (D) are irrelevant to the ease of swimming in seawater and do not address the specific physical properties that make swimming easier, such as buoyancy. Therefore, the correct option is (C) The density of seawater is higher than that of ordinary water.
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