Density and upthrust Quiz
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5 questions, one answer each
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1. A block has mass 0.60 kg and volume 2.0 × 10⁻⁴ m³. What is its density?
- A. 1.2 × 10⁻⁴ kg m⁻³
- B. 3.0 × 10³ kg m⁻³
- C. 1.2 × 10² kg m⁻³
- D. 3.3 × 10⁻⁴ kg m⁻³
2. Which statement is Archimedes' principle?
- A. Upthrust equals the weight of the object
- B. Upthrust equals the volume of fluid displaced
- C. Upthrust equals the weight of fluid displaced
- D. Upthrust equals the density of the fluid
3. An object of volume 3.0 × 10⁻⁴ m³ is fully submerged in water (1000 kg m⁻³). What is the upthrust? (g = 9.81 N kg⁻¹)
- A. 2.9 N
- B. 0.30 N
- C. 29 N
- D. 2.9 × 10⁻³ N
4. A floating boat has a weight of 8.0 kN. What is the weight of water it displaces?
- A. Less than 8.0 kN
- B. More than 8.0 kN
- C. 8.0 kN
- D. It depends on the boat's volume only
5. A solid of density 2000 kg m⁻³ is placed in water. Why does it sink?
- A. Its weight is greater than the maximum upthrust, even fully submerged
- B. Water exerts no upthrust on dense objects
- C. Its mass is large
- D. The upthrust is greater than its weight