Density, pressure and Archimedes' principle

Question 1 of 10

Archimedes' principle states that when a body is immersed in a fluid, it experiences an upthrust equal to

Question 2 of 10

A force of 200 N acts on an area of 10 m². The pressure is ___ Pa.

Question 3 of 10

A sharp knife cuts better than a blunt one because

Question 4 of 10

A solid weighs 6 N in air, 4.5 N in water and 4.8 N in a liquid. (a) State Archimedes' principle. (b) Find the upthrust in water and in the liquid. (c) Find the relative density of the solid. (d) Find the relative density of the liquid.

Question 5 of 10

Pressure in a liquid depends on

Question 6 of 10

In a hydraulic press, a force of 20 N is applied to a piston of area 0.01 m². Find the force on a piston of area 2 m².

Question 7 of 10

Relative density has the unit kg/m³.

Question 8 of 10

In a hydraulic press, a force of 20 N is applied to a piston of area 0.05 m². Find the force on a piston of area 2 m².

Question 9 of 10

Find the pressure due to a column of liquid of density 1,000 kg/m³ at a depth of 20 m. (g = 10 m/s²)

Question 10 of 10

A solid weighs 12 N in air, 9 N in water and 9.6 N in a liquid. (a) State Archimedes' principle. (b) Find the upthrust in water and in the liquid. (c) Find the relative density of the solid. (d) Find the relative density of the liquid.