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 Physical Quantities and Measurement 40 Flashcards |
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What is the formula for density? |
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Density (d) = Mass (M) ÷ Volume (V) |
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Which of the following units represents density? A) kg/m³ B) m² C) s/m D) J/kg |
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A) kg/m³ |
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True or False: The density of a substance changes with its shape or size. |
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False. The density of a substance does not change with its shape or size. |
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Fill in the blank: The density of water is maximum at ______ degrees Celsius. |
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4°C |
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Riddle: I float on water, but I'm not a fish. My density is less than that of water. What am I? |
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Cork |
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What happens to the density of a substance when it is heated? |
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The density decreases because its volume increases. |
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Which method is used to measure the volume of an irregular solid? |
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Displacement method |
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True or False: A density bottle can only measure the density of solids. |
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False. A density bottle is used to measure the density of liquids. |
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Fill in the blank: The relative density of a substance is defined as the ratio of the ______ of the substance to the density of water. |
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Density |
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What is the relationship between mass and volume when determining density? |
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Density is mass per unit volume. |
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Which of the following statements is true about buoyant force? A) It always pulls objects down B) It acts upwards on submerged objects C) It is equal to the weight of the object D) It is irrelevant to density |
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B) It acts upwards on submerged objects |
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Fill in the blank: A ship made of iron can float because it has a lot of ______ inside. |
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Empty space |
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Riddle: I am a liquid that can make you float, my density is 1 g/cm³, what am I? |
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Water |
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What is the unit of relative density? |
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Relative density is dimensionless and has no unit. |
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True or False: Ice floats on water because its density is more than water's density. |
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False. Ice floats on water because its density is less than water's density. |
Card: 30 / 40 |
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What determines whether an object will float or sink in a liquid? |
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The object's density compared to the liquid's density. |
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Fill in the blank: When a body is submerged, the buoyant force acting on it is equal to the weight of the ______ displaced. |
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Liquid |
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Riddle: I am a state of matter where particles are far apart, and I can fill any container. What am I? |
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Gas |
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How does the density of a gas change with temperature? |
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Density decreases when the temperature increases. |
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Which vessel is commonly used to measure the volume of liquids? |
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Measuring cylinder |
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