Density & Pressure Quiz
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5 questions, one answer each
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1. What is the equation for density?
- A. ρ = m × V
- B. ρ = m / V
- C. ρ = V / m
- D. ρ = m + V
2. A liquid has a mass of 800 g and a volume of 1000 cm³. What is its density in kg/m³?
- A. 0.8 kg/m³
- B. 8 kg/m³
- C. 800 kg/m³
- D. 80 kg/m³
3. Why does a sharp knife cut more easily than a blunt one, for the same applied force?
- A. The sharp knife has a larger area, reducing pressure
- B. The sharp knife has a smaller area, increasing pressure
- C. The sharp knife weighs less
- D. Sharpness has no effect on pressure
4. How does pressure act at a point within a liquid at rest?
- A. Only downwards, due to gravity
- B. Only upwards, due to buoyancy
- C. Equally in all directions
- D. Only sideways, along the container walls
5. What is the pressure due to a column of oil 4 m deep, if the oil has a density of 800 kg/m³ and g = 10 N/kg?
- A. 3200 Pa
- B. 32,000 Pa
- C. 320 Pa
- D. 0.32 Pa