A sphere of radius mm moves at m s⁻¹ through oil of viscosity Pa s. Calculate the viscous drag in mN.
Salam Academy Original Practice · Proposed mark scheme
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12 questions
A ball of volume m³ is fully submerged in water ( kg m⁻³). Calculate the upthrust in N. ( N kg⁻¹)
Salam Academy Original Practice · Proposed mark scheme
In laminar flow
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As a liquid such as oil is heated, its viscosity
Salam Academy Original Practice · Proposed mark scheme
At terminal velocity, a sphere falling through a liquid has
Salam Academy Original Practice · Proposed mark scheme
A sphere of radius mm moves at m s⁻¹ through a liquid of viscosity Pa s. Calculate the viscous drag in mN.
Salam Academy Original Practice · Proposed mark scheme
Turbulent flow is characterised by
Salam Academy Original Practice · Proposed mark scheme
Two spheres of the same material fall through the same liquid. One has twice the radius. State the ratio of their terminal velocities (larger : smaller).
Salam Academy Original Practice · Proposed mark scheme
Calculate the weight, in mN, of a steel ball of radius mm and density kg m⁻³. ( N kg⁻¹)
Salam Academy Original Practice · Proposed mark scheme
A sphere's radius is tripled (same material, same liquid). State the factor by which its terminal velocity changes.
Salam Academy Original Practice · Proposed mark scheme
A steel ball of radius mm and density kg m⁻³ falls through glycerol of density kg m⁻³ and viscosity Pa s. Calculate its terminal velocity in cm s⁻¹.
Salam Academy Original Practice · Proposed mark scheme
A ball of radius mm and density kg m⁻³ falls at a terminal velocity of m s⁻¹ through oil of density kg m⁻³. Calculate the viscosity of the oil in Pa s.
Salam Academy Original Practice · Proposed mark scheme