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Questions and Answers
What unit is mass typically measured in?
What unit is mass typically measured in?
- Meters
- Grams (correct)
- Cubic centimeters
- Liters
A cubic centimeter is equal to one millimeter cubed.
A cubic centimeter is equal to one millimeter cubed.
False (B)
What is the formula to calculate density?
What is the formula to calculate density?
D = M / V
If a substance has a mass of 500g and a volume of 100cm³, its density is _____ g/cm³.
If a substance has a mass of 500g and a volume of 100cm³, its density is _____ g/cm³.
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Match the following substances with their density:
Match the following substances with their density:
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Study Notes
Mass
- Mass measures the number of particles or the amount of matter in a substance.
- Units of mass include grams (g) and kilograms (kg).
- Conversion: grams = kilograms × 1000.
- Mass can be measured using a scale.
Volume
- Volume refers to the space occupied by matter.
- Units of volume include cubic millimeters (mm³) and cubic centimeters (cm³).
- Conversion: 1 cm³ = 1000 mm³.
- Volume can be determined using the displacement method or geometric formulas.
- Example: Volume of a rectangular dish with dimensions 8 cm × 5 cm × 3 cm is 120 cm³.
Density
- Density is the mass of a substance relative to its volume.
- Units for density are grams per cubic centimeter (g/cm³) or grams per milliliter (g/mL).
- Density formula: D = M / V, where M is mass and V is volume.
- Ensure mass is in grams and volume is in cm³ or mL for accurate density calculations.
Understanding Density
- Different materials can have the same mass but differ significantly in volume.
- Example: 1 kg of gold has a volume of approximately 52 cm³, while 1 kg of feathers occupies about 15,000 cm³.
- Gold density: 19.2 g/cm³; Feather density: 0.05 g/cm³.
- Higher density indicates more particles packed into a given space.
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